FIELD: mining. SUBSTANCE: hydraulic prop consists of cylinder, movable part, central tube, slider, drive mechanism, piston and relieving handle. Movable part has head with body of valve unit containing coaxially positioned pusher, bushing, spring-loaded ball and safety valve with plug. Bushing has annular recess on outer contour for tightening, and seat located in central depression for ball interacting from the side of above-valve hollow with end-face stop. Outer diameter of pusher is smaller than outer diameter of bushing. EFFECT: higher efficiency. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| HYDRAULIC INDIVIDUAL PROP | 1992 |
|
RU2039289C1 |
| HYDRAULIC PROP | 0 |
|
SU1182174A1 |
| HYDRAULIC PROP OF MINE SUPPORT | 1990 |
|
RU2023163C1 |
| VALVE UNIT OF HYDRAULIC PROP WITH SEALED HYDRAULIC SYSTEM | 0 |
|
SU1603083A1 |
| HYDRAULIC PROP WITH EXTERNAL POWER SUPPLY SYSTEM | 0 |
|
SU1151683A1 |
| HYDRAULIC PROP WITH CLOSED HYDRAULIC SYSTEM | 0 |
|
SU872770A1 |
| DEVICE FOR SUPPORT AND FEED OF DRILLING MACHINE | 1991 |
|
RU2040692C1 |
| DISTRIBUTING-DAMPING CONTROL UNIT | 0 |
|
SU1810230A1 |
| HYDRAULIC CONTROL VALVE OF MINE POWERED SUPPORTS | 1995 |
|
RU2109956C1 |
| FILLING AND RELIEVING GUN FOR HYDRAULIC PROPS | 0 |
|
SU1084451A1 |
