FIELD: mining.
SUBSTANCE: system of valves for a powered support unit in underground mines comprises the first and second unblocked check valves, besides, the first check valve is connected with a drop cylinder of a support unit, and the second check valve is connected with a lifting cylinder of a support unit, besides, both check valves are connected with each other. At the same time the control input of the second check valve is connected with the input of the piston surface of the first check valve, and the discharge input of the second check valve is connected to the input of the circular surface of the first check valve.
EFFECT: making it possible to maintain pressure in a lifting hydraulic cylinder as a support unit moves.
6 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SYSTEM OF VALVES AND MECHANICAL SUPPORT COMPARTMENT EQUIPPED WITH ABOVE SYSTEM OF VALVES | 2008 |
|
RU2409744C2 |
| VALVE | 2008 |
|
RU2398151C2 |
| DEVICE FOR CONTROL OF YIELDING PROP OF POWERED SHIELD SUPPORT | 0 |
|
SU1811559A3 |
| ARRANGEMENT OF VALVES, COMBINATION OF TWO SUPPORT LEGS AND PUMP CYLINDER FOR SAID ARRANGEMENT | 2009 |
|
RU2403392C1 |
| POWER SUPPORT UNIT | 0 |
|
SU1308766A1 |
| HYDRAULIC SUPPORT WITH VARIABLE RESISTANCE AND ENERGY RECOVERY | 2012 |
|
RU2510460C2 |
| HYDRAULICALLY-ASSISTED SUPPORT WITH THROTTLING DIRECTION CONTROL VALVE AND ENERGY RECOVERY | 2012 |
|
RU2503816C1 |
| 0 |
|
SU531478A3 | |
| VALVE DEVICE | 2009 |
|
RU2477796C2 |
| DEVICE FOR PACKING CARGOES | 0 |
|
SU1194797A1 |
