SU1333921A1 - Non-return valve - Google Patents

Description

1133

This invention relates to pipe fittings.

Known check valve to shut off the flow of the working medium, comprising a housing with a shut-off member and a forced drive in the form of a screw engine, designed

to open the valve, for example, in

when stuck or stuck. 2

body in the seat 11. The valve includes a housing 1 with a seat

The disadvantage of this valve is the owner - 2. In the case on the rotary axis 3 a rotary locking member 4 is mounted. On axis 3 one of the 15 is rigidly fixed

thats

that the interaction of the locking organ with the pusher is possible only in the closed position. In addition, the screw plunger must be returned to its original position to allow the device to function as a check valve.

The closest to the proposed technical entity is a check valve that contains a rotatable locking element installed in the housing, a forced actuator pusher and a lever mounted obliquely to the axis of the saddle, one arm of which is fixed to the axis of rotation of the locking organ 2 J.

A disadvantage of the known valve is the impossibility of using it with a remote control, which could ensure the operation of the valve in both automatic and controlled modes.

The purpose of the invention is to expand the functionality by creating a check valve design with the possibility of independent control of the shut-off valve, both with the working medium and with a remote actuator acting on the shut-off member in the Open and Closed position.

The goal is achieved by the fact that in a check valve containing a rotary locking body installed in the housing, a push actuator pusher and a lever mounted obliquely to the axis of the saddle, one arm of which is fixed on the rotation axis of the locking body, a slit is made in the pusher in the plane perpendicular the axis of rotation of the locking member, and in it is placed the second arm of the lever, and in the pusher there is a groove in which there is an elastically loaded stop in the direction of the saddle.

20

thirty

35

its arms lever .. 5, installed at an angle to the axis of the pipeline. Drive unit

6 is mounted on the housing 1 and is provided with a pusher 7, in which a slot 8 is made, in which the lever arm 5 is placed. At the bottom of the pushers

7, a transverse groove 9 is provided in which the abutment 10 is placed, made in the form of a cylindrical pin mounted perpendicular to the axis of the rotary shaft. Emphasis 1U is held in its extreme position by the spring 11.

The valve works as follows

During the passage of the medium in the destroyed direction (in FIG. 1, indicated by an arrow), the locking member 4 rotates around axis 3; The lever 5 rotates freely in the slot 8, regardless of the pusher 7 of the actuator 6, since the slot length is longer than the stroke of the lever. In the event of a change in the direction of movement of the medium, the locking member 4 turns and presses against the saddle 2, preventing the movement of the medium. In the absence of jamming, sticking, etc. The valve operates as indicated.

In the case of jamming of the locking member 4 in the Closed position, the actuator 6 is turned on, the pusher 7 starts moving upward. The stop 10, acting on the lever arm 5, causes the axis 3 to rotate and the locking member 4 secured thereto counterclockwise. The opening of the valve begins. At the end of the stroke, the lever 5 occupies a position in which the stop 10, moving along it, overcoming the resistance of the spring 11, moves into the groove 9 and slides off the lever 5. The spring 11 returns the stop 10 to its original position, while the stop 10 slides over the lever 5 The valve is open, and the stop 10 is not an obstruction 40

45

50

55

Said stop is made in the form of a finger mounted perpendicular to the axis of the pusher with the possibility of rotation,

FIG. 1 schematically depicts a check valve; in fig. 2 - the same, view from the side of the connecting flange-, FIG. 3 - section A-A on

2. In the case on the rotary axis 3 a rotary locking member is mounted 4. On axis 3, one of the

0

0

five

its arms lever .. 5, installed at an angle to the axis of the pipeline. Drive unit

6 is mounted on the housing 1 and is provided with a pusher 7, in which a slot 8 is made, in which the lever arm 5 is placed. At the bottom of the pushers

7, a transverse groove 9 is provided in which the stop 10 is arranged, made in the form of a cylindrical pin mounted perpendicular to the axis of the tiller so that it can rotate. Emphasis 1U is held in its extreme position by the spring 11.

The valve operates as follows.

During the passage of the medium in the destroyed direction (in FIG. 1, indicated by an arrow), the locking member 4 rotates around axis 3; The lever 5 rotates freely in the slot 8, regardless of the pusher 7 of the actuator 6, since the slot length is longer than the stroke of the lever. In the event of a change in the direction of movement of the medium, the locking member 4 turns and presses against the saddle 2, preventing the movement of the medium. In the absence of jamming, sticking, etc. The valve operates as indicated.

In the case of jamming of the locking member 4 in the Closed position, the actuator 6 is turned on, the pusher 7 starts moving upward. The stop 10, acting on the lever arm 5, causes the axis 3 to rotate and the locking member 4 secured thereto counterclockwise. The opening of the valve begins. At the end of the stroke, the lever 5 occupies a position in which the stop 10, moving along it, overcoming the resistance of the spring 11, moves into the groove 9 and slides off the lever 5. The spring 11 returns the stop 10 to its original position, while the stop 10 slides over the lever 5 The valve is open, and the stop 10 is not obstructed

five

0

five

there is no spontaneous closure of the closure member 4 in the event that the medium enters in the direction opposite to the permitted one (opposite the arrow, fig. O,

In case of closure of the locking member 4 in the Open position, the actuator 6 is activated, the pusher 7 starts to move down. The stop 10, acting on the lever arm 5, causes the axis 3 to rotate and the locking member 4 secured thereto clockwise. The closing of the valve begins. At the end of the stroke, the lever 5 occupies a position (Fig. 1) at which the stop 10, moving along it, overcoming the resistance of the spring 11, moves in the groove 9 and slides off the growl

ha 5. The spring 11 returns the anvil 10 to its original position, with the anvil 10 being under the lever 5 (Fig. 1). The valve is closed, and the stop 10 does not prevent the spontaneous opening of the locking member 4 in the event of medium flow in the permitted direction (in the direction of the arrow).

Such an embodiment of the check valve allows extending its functionality by ensuring the valve operates both automatically (of the pressure of the working medium) and from the forced actuator at any working position of the locking member.

FIG. 2

Fi.Z

Editor M.Dshyn

Compiled by G.Ivanov

Tehred M. Dvdyk Proofreader S. Cherni

Order 3943/34 Circulation 811 Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

m-and ".-.". ".".

Production and printing company, Uzhgorod, st. Project, 4

Claims (2)

1. A CHECK VALVE, comprising a rotary locking member installed in the housing, a forced drive pusher and a lever mounted obliquely to the seat axis, one shoulder of which is fixed to the axis of rotation of the locking member, characterized in that, in order to expand the functionality, the slot is made in the plane perpendicular to the axis of rotation of the locking element, and the second lever arm is placed in it, moreover, a groove is made in the push rod, in which an emphasis is placed elastically loaded in the direction of the saddle. 2. Valve according to π. 1, which is due to the fact that the emphasis is made in the form of a pylz mounted perpendicular to the axis of the pusher with the possibility of rotation. fig 1