SU1312291A1 - Trilinear valve distributor - Google Patents

Abstract

The invention relates to the field of mechanical engineering and is intended to change the direction of flow of the working medium in pneumatic and hydraulic control systems. The aim of the invention is to enhance the functionality of the distributor by increasing the number of distributor positions. On the pusher 8 of the actuator 7 is installed shut-off body 10, which overlaps the communicating channel 2 and the drain 6 of the cavity 5 of the piston 4 with the formation of the drain valve. When the piston 4 is moved simultaneously with the closing of the check valve placed between the working 2 and the pressure 3 cavities, the drain valve closes. 3 il. (L s / 11 H 5 W W 8 1 G7. With to yu with Figure 1

Description

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The invention relates to mechanical engineering and is intended to change the direction of flow of the working medium in pneumatic and hydraulic control systems.

The purpose of the invention is to expand the functionality of the distributor by increasing the number of positions.

Figure 1 shows the valve in the position when the non-return valve is open, section; figure 2 is the same, the check and drain valves are closed; on fig.Z - the same, the drain valve is open.

The distributor includes a housing I, a check valve located between the operating 2 and the pressure 3 cavities of the housing 1, mounted to move and act on the non-return valve, a sensitive element, made in the form of a piston 4 with a valve 5, communicating the working 2 and drain 6 cavities of the housing 1, and reciprocating, for example, a screw drive 7 with a pusher 8 acting on the piston 4. In the case 1 in the drain cavity 6 a shoulder 9 is made, limiting the movement of the piston 4 towards the pusher 8.

On the pusher 8 of the actuator 7 is installed stop valve GO, blocking the channel 5 of the piston 4 with the formation of a drain valve when moving this piston 4.

The check valve is formed by a spring-loaded fungal valve 11 with an elastic ring and a saddle 12, made on the partition 13 of the housing 1.

In housing 1, channels 14-16 are completed, each of which is connected to the corresponding cavity (2, 3, and 6) of housing 1.

The distributor works as follows.

In the position shown in figure 1, the check valve formed by the valve 11 and the Saddle 12, due to the influence of the piston 4 is open, and the drain valve is closed.

When this working medium from the line through, the valve enters the working cavity 2 and through the channel 15 to the consumer.

By rotating the actuator 7, it is injected into a specific amount.

5 Herewith, due to the excessive pressure acting on the piston 4 from the side of the working cavity 2, the piston 4 remains constantly pressed against the locking member 10, ensuring

0 closed position of the drain valve. The shutter 11 of the check valve under the action of the spring i 7 fits the seat 12, closing this valve. The distributor is located in an intermediate position, in which the check and drain valves are closed (Fig. 2).

Upon further rotation of the actuator in the direction of threading, the piston 4 moves to the thrust collar 9 and the actuator 7 stops and together with it the stop valve 10 of the drain valve continues to move, thus opening the drain valve. The working cavity 2, and consequently, the consumer also communicates with the drain through the channel 16. When screwing in the actuator 7, the distributor switches sequentially in the reverse direction.

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Formula FROM; O. bratis

A three-way valve distributor, comprising a housing, a check valve, located between the working and pressure cavities of the housing, mounted to move and act on a check valve

sensing element with a channel

communicating the working and drain cavity of the housing, and the reciprocating actuator with a pusher acting on the sensitive element, and

The housing is provided with a collar limiting the movement of the sensing element towards the pusher, characterized in that, in order to expand the functionality of the distributor by increasing the number of positions, a shut-off member is installed on the actuator pusher that overlaps the channel in the sensing element when the element is moved.

Fig.d

Claims (1)

Claim A three-line valve distributor comprising a housing, a check valve located between the working and pressure cavities of the housing; a sensing element installed with the ability to move and act on the check valve with a channel communicating the working and drain cavities of the housing, and a reciprocating drive with a pusher acting on the sensing element, and a collar is made in the housing restricting the movement of the sensitive element towards the pusher, characterized in that, in order to expand the functionality of the distributor by increasing the number of positions, a shut-off element is installed on the drive plunger that blocks the channel sensing element by moving the element. '' Compiled by A. Biryukova