CS197537B1 - Facility for distribution of the pressure medium - Google Patents

Description

The prior art devices use hydraulic spool valves for the distribution of the pressure medium, which, however, have a number of disadvantages: high purchase price, frequent leakage of the medium due to existing leaks and are irreparable after wear.

These drawbacks are overcome by a device that uses logical hydraulic elements, ie controlled valves. Their arrangement in switchgear is known in cases of use of reversible hydrogen generators, but it is very large, especially with regard to the necessity to install two non-return valves connecting both pressure branches to the safety valve.

From a production point of view, the block comprising the above hydraulic elements is demanding and expensive.

These disadvantages are overcome by a device according to the invention consisting of at least one pair of valve hydraulic logic elements, two non-return valves, a safety valve and actuators, the principle being that the pair of valve hydraulic elements is housed in a block along a longitudinal axis and interconnected with simultaneous connection to one control. It is a further object of the invention that a pair of non-return valves provided with a common spring are mounted in a block along a longitudinal axis, the spaces behind the plug facing each other and interconnected, communicating with the safety valve.

197 537

197 537 valve. The device may comprise any number of pairs of valve hydraulic elements arranged in layers.

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A further benefit of the device according to the invention is the reduction of hydraulic pressure losses and the associated undesired warming of the hydraulic circuits. The device according to the invention also enables quick control of each hydraulic motor by one control element, while in other cases two control elements would have to be used.

The device according to the invention is cheaper on the one hand by using two pieces of non-return valves and one piece of safety valve instead of two pieces of safety valves and, on the other hand, the lapping required so far.

1 is a schematic representation of a pressure medium distribution device, FIG. 2 shows one layer of valve hydraulic logic elements embedded in a block, and FIG. 3 shows the position of the check valves.

The reversing pump 1 is connected to the branches 2, to the branch 2 there are connected the spaces 4, in front of the plug of the uniform valves of pairs, placed in individual layers; whereas the spaces 6, 7 in front of the plug of the remaining valves are connected to branch 3.

The spaces 8, 10J 2 »ϋ» ^{behind the} plug, of each pair of valves, are connected to the hydraulic motors. Control spaces 12, 1-4 respectively. 13. The 15 individual pairs of valves are connected to a common output of the control element 16, respectively. 17.

In the branches 2, 2 there are built-in check valves 18, 19 allowing the flow of liquid to the safety valve 20. The individual hydraulic motors are actuated by adjusting the control elements 16 and 16 respectively. 17, wherein the direction of movement is controlled by the deflection direction of the pump.

When the working pressure set on the safety valve 20 is exceeded, the liquid flows through one of the check valves 18, 19 and the safety valve 20 into the drain 21.

The valve hydraulic logic elements are each installed in block 22 in pairs. Thus, in one layer there are two valve hydraulic logic elements 23, 24 which are arranged so that their control spaces 12, 14 are connected to a common outlet.

This new arrangement saves installation space, the connection ducts are simpler than the original solutions and are much shorter. There is no need to use plugs on the channels, which makes production cheaper.

In similar blocks 22, check valves 18, 19 are similarly arranged, with the spaces behind the plug 25, 26 facing each other and connected to a common outlet. This arrangement of check valves 18, 19 allows the use of one common spring 27 '.

In each block 22, each valve inlet will be provided with an insert 28, 29 in which apertures are provided to allow the entry of the flake fluid from the common channels into the valves.

As in the case of valve hydraulic logic elements, the installation space is saved, the ducts are simpler and shorter and there is no need for plugs. If a plurality of hydraulic motors are used in a hydraulic system, the pressure medium distribution system consists of a plurality of valve hydraulic logic elements. Terms

197 537 of the manufacturing and operating process, it is preferred that the individual layers be formed by separate blocks. While this requires grinding of the mating surfaces to seal the through ducts, on the other hand it brings the advantages of quick and easy interchangeability, i.e. a modular system.

When a small number of hydraulic motors are used, the pressure medium distribution device comprises a small number of layers and can be realized preferably in a single block.

Claims (3)

SUBJECT OF THE INVENTION Apparatus for distributing a pressure medium comprising at least one pair of valve hydraulic logic elements, one pair of non-return valves, a safety valve and actuators, characterized in that the pair of valve hydraulic logical elements (23, 24) is housed in a block (22). ) in the same longitudinal axis, the control spaces (12, 14) facing each other and interconnected, with simultaneous connection to one control element (16). Device according to Claim 1, characterized in that a pair of non-return valves (18, 19) provided with a common spring (27) are arranged in the block (22) in one longitudinal axis, the spaces (25, 26) behind the plug facing each other interconnected, communicating with the relief valve (20). Device according to Claims 1 and 2, characterized in that it comprises several pairs of valve hydraulic logic elements (23, 24) arranged in layers.