RU2700314C1 - Bypass valve device - Google Patents

Abstract

FIELD: valves.

SUBSTANCE: invention relates to valve devices and can be used in designs of hydraulic shock absorbers: impact stoppers and elements of support-suspended pipeline protection systems against external dynamic effects. Bypass valve device includes a spring-loaded valve and a valve support with a through hole, equipped with a seat in the form of a circular collar for valve seating, is characterized by that it includes a cylindrical bushing, which is equipped in the middle of the support with two seats for seating of two displaceable valves made in the sleeve, each of which is equipped with 6–10 holes made at angle of 20–60° to landing seats plane, and central conical guide, wherein between valves there is a spring, and valves are installed on different sides of support so that central cone guides were directed towards each other.

EFFECT: invention provides displacement speed of locking rod of hydraulic shock absorber 2–6 mm/s at external dynamic actions with force of 18–1,000 kN acting in opposite directions.

1 cl, 1 dwg

Description

The invention relates to hydraulic valve devices and may find application in the designs of hydraulic shock absorbers: shock stops and elements of support and suspension systems for protecting pipelines from external dynamic influences.

A hydraulic shock absorber is known comprising a working cylinder with a bottom insert, a rod with a piston placed therein, throttle disks mounted on the last and bottom insert, and rebound and compression valves having each locking element located in a corresponding hole, increasing in cross section direction with a locking head, characterized in that the part of the locking element facing the saddle, at least the rebound valve, is made in the form of a cylinder mounted with a radial throttle clearance core conjugate with variable cross-section part of the locking member and the locking head, and the ratio of the height h of the cylinder to the height K variable cross-section portion of the locking member is equal to O <h / K≅0,25.

((RU 2020310, F16F 5/00, published 09/30/1994)

The closest in technical essence is a hydraulic vibration damper containing a valve device, which is located in the cylindrical piston cavity between the supravalve and piston cylinder cavities and includes a support with passage holes provided with saddles in the form of annular collars for fitting the inlet valve made in in the form of a spring-loaded disk, while the safety valve is made in the form of elastic plates pressed against the passage through holes of the support from the sub rhoid cavity.

(RU 80208, F16F 5/00, published 01/27/2009)

A disadvantage of the known bypass valve devices used in devices for damping vibration loads of vehicles is the inability to use them in hydraulic shock absorbers for damping dynamic effects of the opposite direction.

The objective and technical result of the invention is the creation of a bypass valve device for use in the design of hydraulic shock absorbers (shock stoppers and elements of support and suspension systems for protecting pipelines), providing a locking speed of the hydraulic shock absorber rod 2-6 mm / s with external dynamic forces of 18-1000 kN, acting in opposite directions.

The technical result is achieved in that the bypass valve device includes a spring-loaded valve and a valve support with a bore, provided with a seat in the form of an annular collar for seating the valve, characterized in that it includes a cylindrical sleeve, which is provided in the middle with a support with two seats for seating two the ability to move inside the valve sleeve in the form of discs, each of which is equipped with 6-10 holes made at an angle of 20-60 ° to the plane of the seat seats, and a central conical guide, moreover, a spring is placed between the valves, and the valves are installed on opposite sides of the support so that the central conical guides are directed towards each other.

The technical result is also achieved by the fact that in the transfer device the movement of the valves is limited by stops.

The invention can be illustrated by an example using the drawing, where:

1 - bypass valve device;

2 - a cylindrical sleeve;

3 - support with two saddles landing;

4 - valves with central conical guides;

5 - the angle of inclination of the valve openings to the plane of the seats;

6 - spring;

7 - holes in the valves;

8 - valve stop;

9- working cylinder;

The bypass valve device 1 according to the invention (see drawing) contains a cylindrical sleeve 2, inside of which an annular support 3 is provided, provided with two annular seats for seating two valves 4: A (left) and B (right). The valves 4 have the ability to move inside the sleeve 2 and are made in the form of disks, each of which is equipped with 6-10 holes 7 made at an angle 5 equal to 20-60 ° to the plane of the seat seats, and a central conical guide.

Between the valves 4, a spring 6 is placed, and the valves 4 are installed on opposite sides of the support 3 so that the central conical guides are directed towards each other. The valve guides provide a fixed arrangement of the spring 6 between the valves 4. In the assembled neutral position of the device 1, the spring 6 unclenches the valves 4 until they are pressed against the stops 8, providing free flow of fluid from left to right or from right to left through openings 7 and the passage through hole of support 3. Stops 8 can have a different design, for example, can be made in the form of a split thrust ring.

The design of the valve device according to the invention works as follows. With a slow increase in fluid pressure in the volume to the left of valve 4A, the bypass valve device according to the invention does not work, since the liquid has time to flow into the volume to the right of valve B through the openings 7 and the bore of the support 3. With a sufficiently sharp increase in pressure in the volume to the left of valve A, this the valve overcomes the force of the spring 6, sits on the seat and closes the passage hole of the support. Valve 4A will block the bore of the support until the difference in fluid pressure to the left of valve 4A and to the right of valve 4B reaches a value sufficient to press spring 6 of valve 4A from the seat seat. The flow of liquid for pressure equalization occurs through holes 7 made at an angle 5 equal to 20-60 ° to the plane of the seat seats, and the discontinuity of valve 4A on the seat. With the final equalization of fluid pressures to the left and to the right of the valve device, the valves 4 occupy the initial position.

Similarly, the valve device of the invention is triggered by a sharp increase in fluid pressure to the right of valve 4B.

The overflow valve device according to the invention in the designs of hydraulic shock absorbers (shock stoppers and elements of supporting suspension systems for protecting pipelines) provides a locking speed of the hydraulic shock absorber rod 2-6 mm / s with external dynamic forces of 18-1000 kN, acting in opposite directions.

Claims (2)

1. The bypass valve device, comprising a spring-loaded valve and a valve support with a bore, provided with a seat in the form of an annular collar for seating the valve, characterized in that it includes a cylindrical sleeve, which is provided in the middle of the support with two seats for seating two made with the possibility of movement inside valve sleeves in the form of discs, each of which is equipped with 6-10 holes made at an angle of 20-60 ° to the plane of the seat seats, and a central conical guide, moreover, between the valves Jin, and valves are mounted on opposite sides of the support so that the central guiding cone were directed toward each other. 2. The device according to p. 1, characterized in that the movement of the valves is limited by stops.

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