SU1730466A1 - Directional valve - Google Patents

Abstract

Use: transfer of the coolant from the primary circulation loop to the secondary loop, located on the working underground horizon of the mine during conditioning of mine air. SUMMARY OF THE INVENTION: the hydraulic distributor comprises a housing within which a sealed container is formed and two partitions are placed, and a partition is divided into three cavities. The internal cavity is connected by pipelines to the return lines of the primary and secondary circuits. The device also contains a spool-type switch, one pair of opposite passage channels of which is connected to the supply lines of the primary and secondary circuits, and the other pair to the supply line of the primary circuit with a check valve and to the external cavities of the hermetic vessel. 1 il. (L

Description

The invention relates to mining and can be used for conditioning mine air, in particular for transferring coolant from the primary circuit of the system to the secondary.

A hydraulic valve with two containers is known, each of which contains an internal partition in the form of a piston. A spool switch with springs and a piston pusher is installed between the containers. The spool switch and vessels are connected by pipelines to each other and to the primary and secondary circuits of the coolant.

The drawbacks of the device are the low life and low operational reliability associated with unsatisfactory operating conditions of the sealing rings of the pistons.

Closest to the present invention is a hydraulic distributor, including sealed containers in the form of cylinders with lids, separated by freely movable pistons, spool flow distributors, valves with a stem and impulse pipes, and pipelines for supplying high and low pressure energy carriers.

The disadvantages of the prototype are low reliability and increased operating costs associated with the small resource of the spool devices in conditions of increased contamination of the coolant.

The purpose of the invention is to increase reliability and reduce operating costs by improving the operating conditions of the seal.

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The goal is achieved by the fact that the sealed container is equipped with an additional internal movable partition, which forms three cavities with the same partition and case of the container, while the internal cavity is connected via pipelines to the primary and secondary circuit return lines, and the switch is connected with supply lines of the primary and secondary circuits, and the other pair - with the supply line of the primary circuit through the pipeline with the return with a valve and with external cavities of the tank through a branched pipeline.

The drawing shows the proposed device.

The pressure reducer includes an airtight container 1 with two movable partitions 2 and 3, made in the form of pistons with sealing rings 4 and 5. In the middle part of the container 1 there is a protrusion 6 fixing one of the extreme positions of the pistons. The hermetic tank has two external 7 and 8 and one internal 9 cavity, which vary in volume during operation. On the outer side, an extensive pipeline 10, 11, is connected to the external cavity 7, 8, and internal pipelines 12 and 13 are connected to the internal cavity. A non-return valve 14 is located on the pipe 12, and a non-return valve 15 is located on the pipe 13. The external cavities 7 and 8 of the hermetic container 1 are connected to pipelines 10 and 11 to the passageway 16 of the flow switch 17, which has three more passageways

18, 19 and 20. Inside the case of the switch 17 there is a cone tube 21 rotating from an independent drive (not shown). The flow switch 17 has semiring channels 22, 23 separated by a partition 24. A pipe 25 with a check valve 26 is connected to a channel 19, a pipe 12 is connected to the return pipe 27 of the primary circuit, and the circulation pipes 25 and 28 through channels

19,20 are connected to the flow line 29 of this circuit. The pipeline 30 connects the channel 18 with the supply line 31 of the secondary circuit, and the pipe 13 connects the return pipe 32 of the secondary circuit with the internal cavity 9 of the tank 1.

The valve works as follows.

In a sealed container, pipeline 13, equipped with a check valve 15, supplies warm water from the secondary circuit return pipe 32, in which the pump maintains a pressure greater than the pressure in the supply line. Under the pressure of water entering the internal cavity 9, the pistons 2.3 are moved apart and the cooled coolant located in the external cavities 7, 8 — water is forced out of them into the branched pipelines 10, 11 and further along channel 16,

a semi-annular cavity 22 of the cone tube 21, a switch body 18, the conduit 30 is directed to the secondary circuit 31. The pressure reducer is connected to the secondary circuit. At this time, the primary circuit is operating in idle mode with the movement of coolant from the supply line 29 through the pipeline 28, channel 20, semicircular cavity 23 of the conical tube

21, to the channel 19, through the open non-return valve 26 on the line 25 to the main line 29. At this time, the pipeline 12 is closed by the check valve 14, since the pressure in the pipes of the primary circuit considerably exceeds the pressure of the coolant in the secondary circuit.

After displacing the coolant from the external cavities 7, 8 by turning the partition of the conical tube 90 ° connect

to the primary contour, as a result of which the semi-circular cavity 23 closes the channels 16, 20, and the semi-circular cavity 22 - channels 18, 19 of the conical plug 17. At this position of the plug, the coolant of the primary

the circuit is supplied from line 29 through channel 20, cavity 23, channel 16 and branched pipelines 10, 11 to external cavities 7, 8. Pistons 2, 3 will move towards the center towards the protrusion 6, and the heated liquid

from the cavity 9 will be pushed through the pipeline 12, the check valve 14 into the return line of the primary circuit. The pipelines 13, 25 and 30 are then closed under high pressure by

check valves 15, 26.

Coolant overflows between the inner 9 and outer cavities 7, 8 are prevented by sealing rings 4

and 5.

This ensures that the heated coolant is dispensed to the return line 27 of the primary circuit, through which it is sent for cooling. A uniform rotation of the conical tube provides for the repetition of cycles.

The application of the proposed device allows to obtain an economic effect by reducing repair work.

Claims (1)

Claims of the Invention Hydrodistributor including a sealed container with a movable partition placed inside it, supply and return lines of the primary and secondary circuits, flow switch and check valve, characterized in that, in order to increase reliability and reduce operating costs, the hermetic tank is equipped with an additional partition installed inside it with the possibility of axial 0 movement for the formation of internal and external cavities, while the internal cavity between the walls communicates with the return lines of the primary and secondary circuits, and the flow switch is made in the form of a conical tube with two pairs of channels, one of which communicates with the supply lines of the primary and secondary circuits and the other pair is connected to the external cavities of the tank and to the flow line of the primary circuit through a check valve. # 1Z / 1 zj J Ja / F: 5 6 18 25 26 21 21  g fSfff / B4 p i