| 摘要 |
A pressing cylinder (1), preferably for use in a refuse compressor for compression of refuse, which when in use is preferably in a vertical positio n, and at the bottom is coupled to a pressing plate (2) and at the top to a secured top plate (3) and which can activate the pressing plate in upward an d downward directions, is composed of preferably three cylinder sections, name ly a first and lower cylinder section (4), which at the bottom is attached to t he pressing plate (2), a second and intermediate cylinder section (5), which ca n be displaced telescopically in the cylinder~s longitudinal direction on the first cylinder section (4), and a third and upper cylinder section (6), whic h at the top is attached to the top plate (3), and which can be displaced telescopically on the second cylinder section (5). The cylinder section (6) is at the bottom embodied with a bottom plate (7), which in combination with th e cylinder section (6) and the top plate delimits a closed hollow space (8). Between the periphery of the bottom plate (7) and the bottom edge of the cylinder barrel of the cylinder section (4) there is internally in the pressing cylinder clamped an approximately cylinder-shaped bendable diaphrag m in the cylinder~s extended position, whereby an airtight space (10) is creat ed internally inthe pressing cylinder. The bottom plate (7) is embodied with an access opening for compressed air, which is admitted to the space (10) throu gh a pipe (12) from a three-way valve (13), which in an initial position opens for compressed air from a compressor (14), and in a second position opens th e space (10) to the atmosphere. Between the bottom plate (7) and the pressing plate (2) an extension spring (15) is fastened, which can pull the cylinder sections (4-6) together at the end of a working stroke. The length of the cylinder in its unloaded position is essentially shorter than the working stroke of the cylinder. The cylinder can have a large diameter and operate a t a correspondingly low working pressure and can therefore have a small wall thickness or be produced of materials other than steel. The pressing cylinde r consequently becomes light and easy to operate. Furthermore, it is cheap to produce. |
