RU2693947C1 - Quick-detachable connection of pipelines - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to split joints of pipelines and can be used in various hydraulic systems of self-propelled machines. Quick-fit connection of pipelines consists of male and female half-couplings and device for their connection and disconnection. Each of half-couplings is made of nozzle with means for connection of pipelines for supply of working fluid, symmetrical axes of half-couplings arranged in channel spring-loaded valve and sealing rings arranged inside housing. In order to eliminate leakage of liquid drops outside during coupling-disconnection of half-couplings in each half-clutch between the union and housing there is a sealing ring, and inside male coupling half sleeve is installed with holes for working fluid passage, with located in it spring, one end of which rests against inner surface of valve. Latter is made with shank, end part of which enters inner hole of sleeve, and other end of spring enters inner hole of sleeve. In housing of female half-coupling there is holder with holes for liquid passage, in which rod with groove for sealing ring is fixed with possibility of detachment, besides, spring-loaded sleeve and spring-loaded barrel are installed inside the housing of half-coupling, which is movably installed inside the holder. On the outer side of the body of the female half-coupling there is a device for connection and disconnection of the half-couplings, resting on the sleeve, as well as a retainer, a return spring and a locking ring.

EFFECT: proposed is a quick-detachable connection of pipelines.

5 cl, 3 dwg

Description

The present invention relates to the field of engineering, for detachable connections of pipelines and can be used in various hydraulic systems of self-propelled machines, for example in the lubrication systems, cooling, connecting additional machines and mechanisms.

Known "Quick coupling" RU 2118734 C1 (application 97105908 from 04.04.1997, publ. 10.09.1998, the IPC F16L 37/28), containing coupling halves, valve with drive unit and mechanism for locking the coupling halves, including a set of balls located in separator and grooves and pursed spring. The valve actuator assembly is made in the form of rods installed on both sides of the valve in the guides, a spring placed on one of the rods on the side of the coupling half, designed to connect to a pressure source, and a flow divider installed in the counter coupling and supported at the end of the other stem. This spring mechanism for locking the coupling half is made in the form of a tape split ring.

The closest in technical essence is the “Quick disconnect connection of pipelines” RU 2343332 C1 (application 2007115722 of April 25, 2007, published on January 10, 2009, IPC F16L 37/00), which includes the male and female coupling halves and the device for connecting and disconnecting them , and each of the coupling halves is provided with a means for connecting the pipeline, a channel for supplying the working fluid symmetrical to the axis of the coupling half, and cylindrical and conical bores of the housing placed in the channel, a spring-loaded valve with side windows for the passage of the working fluid, and a conical closure member whose shape corresponds to the shape of the housing tapered bore, and with a sealing ring placed in a groove in the zone of abutment of the closure member to the conical bore of the body and the valve stroke limiter. The valve is made in the form of a hollow sleeve with a stepped one with a decrease in the diameter of the steps in the direction of the conical bore of the housing with an external surface. The stage with the largest diameter is located in the cylindrical bore of the housing with a transverse wall provided with a central hole with a cylindrical bore on the side of the conical closure element, in which the diameter and depth are taken from the condition that the sealing ring can be located inside the bore cavity and communicated with the cavity of the cylindrical bore of the housing. The shutter element is provided with a guide shank mounted in the central hole of the transverse wall with the possibility of axial movement relative to the sleeve. Side windows are made in the area of the sleeve adjacent to its transverse wall. They are also communicated with an annular gap between the inner surface of the cylindrical bore of the housing and the outer surface of the hub stage connected to the conical bore of the housing. In the cavity of the sleeve, coaxially with it, a cap washer is installed with a central hole in the bottom in which the end of the guide shank is placed, with one end of the said spring resting on the cap washer in which openings are made to communicate the cavity of the cylindrical bore of the housing with the side windows of the sleeve. The ratio of the bore depth of the sleeve to the magnitude of its stroke is 1.3 ... 1.5. The sleeve stroke stop is made in the form of an annular shoulder of a cylindrical bore to the body of the coupling half.

The cavity of the bore of the sleeve communicates with the cavity of the cylindrical bore of the housing through holes made in the transverse wall of the sleeve. In addition, the cavity of the bore sleeve is communicated with the cavity of the cylindrical bore of the housing by means of longitudinal grooves made on the guide shaft. The housing of each coupling half from the side of the said cylindrical bore is provided with an additional cylindrical boring of smaller diameter adjacent to it with the formation of a shoulder serving as a support for the other end of the spring.

The disadvantages of the known devices are the flow of fluid during the separation of the coupling halves. The reason for this is the presence of a cavity in the inner part of the half-coupling covering, which leads to the accumulation of fluid until the coupling halves are completely separated. The sagging of the locking balls in the inner part of the female coupling reduces the speed of adhesion. The reduction in the speed of separation occurs due to the fact that in the process of separation of the two coupling halves two springs participate, and the shutter elements of the coupling halves have a small area of contact.

The technical result of the invention is the elimination of the flow of liquid droplets out during the docking-disconnection of the coupling halves.

The essence of the proposed quick-coupling pipelines consists of a covered and covering coupling halves and devices for connecting and disconnecting them, and each coupling half is made of a choke with means for connecting pipelines for supplying the working fluid, symmetrical axes of coupling half, placed in a channel with a spring-loaded valve and sealing rings placed inside the case.

New in the proposed device is the implementation in each coupling half between the fitting and the housing has an O-ring, and inside the covered coupling half is installed a sleeve with holes for the passage of working fluid, with a spring located in it, one of the ends of which rests against the inner surface of the valve, made with a shank, the end of which enters the inner hole of the sleeve. The other end of the spring enters the inner bore of the sleeve. Inside the housing of the half-coupling, there is a holder with holes for the passage of fluid, in which a rod with a groove for the sealing ring is fastened with the possibility of a connector, and a spring-loaded sleeve and a spring-loaded cup, which is movably mounted inside the holder, are installed inside the housing of the half-coupling. A device for connecting and disconnecting the coupling halves is installed on the outside of the housing enclosing the coupling half.

The device for connecting and disconnecting the coupling halves is made in the form of a housing with conical holes, in which there are balls supported on the sleeve, as well as a clamp, a return spring and a retaining ring.

In the undocked state, the inner end surfaces of the coupling halves form an outer closed plane.

In addition, the valve of the male coupling contains a safety device, and the stem of the sleeve has a blind hole for the safety device.

FIG. 1 shows a general sectional view of the quick coupling in the connected state.

FIG. 2 shows the covered coupling half.

FIG. 3 - covering the coupling half.

A quick coupling, an example of which is shown in FIG. 1, contains liquid or air connections installed at the ends of the lines — pipelines, hoses (not shown), concentric to each other, spanning 1 and encompassing 2 coupling halves and a sealing ring 3 between their mating surfaces. The means for connecting and disconnecting the coupling halves is made in the form of a ball locking device containing a clamp 4 with a spring 5, a retaining ring 6 and balls 7 that are placed in the conical holes of the clamp 4 and the groove of the male coupling half 1 (not shown in Fig. 1) in the connected state .

The covered half coupling (Fig. 2) contains a fitting 8, equipped with a connecting part for liquid or air communication lines 9. The fitting is made in the form of a body of rotation, the outer surfaces of which contain a hexagon for screwing with a wrench (not indicated). The inner part of the nozzle contains cylindrical stepped cavities to accommodate the elements of the coupling half and the flow of working fluid or air.

The fitting 8 is screwed along the thread with the housing 10, between them is installed a sealing ring coupling half 11. The housing 10 is made in the form of a rotating body with internal cylindrical stepped cavities to accommodate the elements of the coupling half and the flow of working fluid or air. Also, the housing 10 has a turnkey hexagon, similar to fitting 8, on the outer surface. The side of the housing 10, opposite the threaded part for screwing with the fitting 8, on the outside contains a circular hemispherical groove 12 for coupling with the female coupling half. The sealing ring 3 is installed in the internal groove of the housing.

Inside the coupling half, a sleeve 13 with holes 14 is installed, as well as with a central hole 15, which are intended for the passage of fluid or air. In the inner part of the sleeve, concentric, set the spring 16, which at one end rests on the bottom of the sleeve 13. At the other end, the spring 16 rests on the valve 17, with a cylindrical locking element of the coupling half. The valve 17 is pressed into the shank 18, also entering the inner bore of the sleeve 13. It is designed to prevent axial displacement of the valve 17. The outer end side of the valve 17 is equipped with a safety device 19, designed for ease of connecting the two coupling halves.

The female half coupling (FIG. 3) contains a fitting 20 provided with a connecting part for fluid or air communication lines 9. The fitting is made in the form of a rotating body, the outer surfaces of which contain a hexagon for screwing with a wrench (not indicated). The inner part of the nozzle contains cylindrical stepped cavities to accommodate the elements of the coupling half and the flow of working fluid or air. The holder 21 in the form of a stepped rotational body with internal cavities and a sealing ring 22 installed in the end groove adjoins the inner flat part of the fitting 20. On the opposite side of the holder there is a radial groove into which the sealing ring 23 is installed. The holder has holes 24 radially located which are designed for the passage of fluid or air. Also, on the holder, there is a protrusion with a hole 25 for fastening the means for securing the self-unscrewing of the rod 26, which is screwed into the axial threaded hole of the holder (not indicated). The rod 26 has openings 27 for the means of preventing self-unscrewing from the side facing the holder 21. On the opposite side, the rod has a thickening, on the outer side of which there is a groove with an installed sealing ring 28. In the thickening of the rod, there is a blind hole 29 for the safety device at the end. 19. The fitting 20 is screwed with the housing 30, made in the form of a body of rotation, one end of which, when screwed, presses on the holder 21, which thereby fits tightly to the fitting 20, sealing the coupling half through the seals Yelnia ring 22. The housing 30 comprises an outer hexagon wrench for screwing (not indicated). The outer side of the case also contains a groove with a retaining ring 6 installed and an emphasis for the return spring 5. On the outer side of the case there are radially arranged conical holes 31. for placing balls 7 in them. A sleeve 32 is inserted into the inner part of the case, one end of which spring 33. The second end of the spring 33 abuts against the far protrusion (not marked) of the holder 21. The sleeve is designed to hold the balls and close the outer part of the coupling half. The inner part of the holder 21 includes a cup 34 with an abutment 35, to which a spring 36 adjoins, the other end of which rests against the proximal protrusion (not indicated) of the holder 21. One end of the glass is held in the holder 21 through the sealing ring 23, the other goes to the sealing ring 28, located on the core thickening. A sliding latch 4 is put on the outer part of the body 30, held on the body 30 by a retaining ring 6 and having a return spring 5, which with one end abuts against the internal tide of the latch 4 and the other - at the shoulder (not indicated) of the body 30. The latch has a radial trapezoid groove 37 for placing balls 7 in it.

The inner end surfaces of both coupling halves in the undock state of the quick disconnect connection of the pipelines form closed planes 38.

The operation of the coupling.

Working fluid or air is supplied to the coupling halves through pipes or hoses to which the coupling halves are attached. In the undocked state, both coupling halves are closed, the working fluid or the air inside the coupling half does not come out.

At the same time, in the male coupling half, the sealing ring 11 does not allow the working fluid or air to leak from the internal volume of the coupling half to the outside, as the fitting 8 and the housing 10 are tightly screwed. The valve 17 under the action of the spring 16 is in the extreme position in the sealing ring 3 (see Fig. 2). Thus, the coupling half protects against loss of working fluid or air in the undocked state.

In the surrounding half coupling in the undocked state (see Fig. 3), the sealing ring 22 does not allow the working fluid or air to leak from the internal volume of the half coupling to the outside when the fitting 20 and the housing 30 are tightly screwed and press the holder 21 to the fitting 20. The glass 34 under the influence of the spring 36 is in the extreme position on the sealing ring 28 of the rod 26. The second end of the glass 34 enters the holder 21 and is covered by the sealing ring 23. Thus, the coupling half prevents loss of the working fluid or air in the joint th state. The sleeve 32 under the action of the spring 33 is in the leftmost position (see Fig. 3) without allowing the balls 7 to descend from the radial trapezoidal groove 37 below into the conical holes 31. Also, this position of the sleeve eliminates the parasitic cavity for filling with the working fluid when disconnecting the coupling half and protects the inside of the coupling half from the ingress of dirt and small foreign objects. The latch 4, which is part of the ball locking mechanism, under the influence of the spring 5 is in the leftmost position (see Fig. 3) and is kept from jumping off the body 30 by a retaining ring 6.

When connecting the two coupling halves (see Fig. 1), the safety valve 19 of the valve 17 enters the blind hole 29, simplifying centering for correct alignment of the two coupling halves. The housing 10 produces a shift of the sleeve 32 inside the covered coupling half. The balls 7 fall into the circular hemispherical groove 12, the radial trapezoid groove 37 of the retainer 4 moves forward. The balls 7, at the same time, are locked with a cylindrical part (not indicated) of the latch 4. Thus, the ball locking device is activated and, accordingly, the clutch leads to the fixation of two connected coupling halves. The rod 26 pushes the valve 17, opening the channel for the flow of working fluid or air in the male coupling half, the shank 18 of the valve 17 enters the sleeve 13. The valve 17 moves almost to touch the sleeve 13. At the same time, the housing 10 enters the internal cavity of the housing 30 and with its end part it pushes the sleeve 32 towards the holder 21. The inner part of the housing 10 containing the sealing ring 3 covers the cup 34. The sleeve 32, driven by the housing 10 when joining two coupling halves, pushes the cup 34. The glass 34 comes off the seal body ring 28, opening the channel for the flow of fluid in the female coupling half between the rod 26 and the glass 34.

To disconnect the coupling halves, the latch 4 is moved towards the fitting 20. The radial trapezoid groove 37 is exactly above the balls 7, freeing the possibility of the balls returning to the initial state. Under the action of the springs, there is a mutual repulsion of the two coupling halves and the reverse movement of all the component parts of the coupling halves. All parts return to the state prior to the connection of the two coupling halves. Due to the elasticity of the springs, the channel is immediately closed with the working fluid of both coupling halves by means of sealing rings.

Thus, the proposed design of the quick coupling of pipelines eliminates the flow of working fluid during disconnection.

Claims (5)

1. A quick disconnect connection of pipelines, consisting of male and female couplings and devices for connecting and disconnecting them, and each of the coupling halves is made of a fitting with means for connecting pipelines for supplying the working fluid, symmetrical to the axes of the coupling halves, placed in the channel with a spring-loaded valve and sealing rings, placed inside the housing, characterized in that in each coupling half between the nozzle and the housing there is a sealing ring, and inside the male coupling half there is a sleeve with the holes for the passage of the working fluid, located in her spring, one of the ends of which abuts against the inner surface of the valve, made with a shank, the end of which enters the inner bore hole, and the other end of the spring enters the inner bore hole, inside the housing half-coupling installed a holder with openings for the passage of fluid, in which a rod with a groove for a sealing ring is fastened with the possibility of a connector; besides, inside the housing enclosing the coupling half Tanovlena spring-loaded sleeve and spring-loaded glass, which is movably installed inside the holder, a device for connecting and disconnecting the coupling half is installed on the outside of the housing covering the coupling half. 2. Quick disconnect connection of pipelines according to claim 1, characterized in that the device for connecting and disconnecting the coupling half is made in the form of a housing with conical holes in which the balls are located, as well as a retainer, a return spring and a retaining ring. 3. Quick disconnect connection of pipelines according to claim 1 or 2, characterized in that the balls rest on the sleeve. 4. The quick-disconnect connection of pipelines under item 1, characterized in that, in the undocked state, the inner end surfaces of the coupling halves form an outer closed plane. 5. The quick disconnect connection of pipelines under item 1, characterized in that the valve of the male coupling contains a safety device, and the stem of the female sleeve contains a blind hole for the safety device.

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