SU713614A1 - Jigging machine - Google Patents

Description

I

The present invention relates to processing equipment, in particular, to devices intended for preliminary and final screening, dewatering and cindering of minerals.

A device is known that contains as actuators of executive bodies — boxes with sieves, crank-hinge, eccentric and imbalance mechanisms {1 | .

A disadvantage of the known device is the complexity of the design associated with the need to use, for example in a crank mechanism, an intermediate link system for transmitting motion from the drive device to the actuator. The disadvantage of remote devices is the dependence of the magnitude of the disturbing force on the mass of the rotating imbalances, the weights and dimensions of which are limited. The EZo-limiting force in these vibrators is formed in the whole radial plane, and

is useful only in one direction, which reduces their efficiency. In addition, in crib-bearing, eccentric and unbalanced structures, the drive bearings are constantly subject to vibration, which reduces the durability of their work.

A vibrating screen is also known, containing a box of whitefish and a vibration mechanism associated with them 2,

The disadvantage of this vibrating screen is the low screening efficiency. The operating mode control system therein is also difficult, due to the fact that the change of intermediate links is required to change the mode.

The aim of the invention is to increase the efficiency of screening.

Claims (1)

The delivered del is achieved by the fact that the vibratory mechanism is made in the form of a plunger hydrocyleshire comprising a housing, a stepped and a multiplier plungers and a valve-pul- sion hydraulically connected to a hydraulic 37 rotsilin, while one end of the multiplication plunger is movably fixed in a stepped plunger connected to one duct and the other end is rigidly connected to the cylinder body associated with the other coffer box. FIG. 1 shows a vibro-inertia screen with a general view; Fig. 2 is a schematic diagram of a hydro-pulse drive of an oscillation exciter of sieve boxes. Vibro-inertia. The onboard screen consists of upper and lower inclined ducts with sieves 1 and 2, articulated suspensions 3, supporting supports with vibration isolators 4, exciter 5, pumping station 6 with a pulsation pulsation valve 7 connected by a flexible high-pressure hose 8 to an actuator vibration exciter 5. The circuit diagram of the hydro-pulse drive of the vibration exciter includes a pumping station 6, a hydro-pulse valve 7, connected by means of a high pressure hose 8 to the working cavity A of the exciter 5. The vibration exciter 5 consists of a hydraulic cylinder body 9, a stepped plunger 1 O containing an internal closed liquid chamber B with a cartoon plunger 11 inside it, the second end of which freely rests on the cover of the hydraulic cylinder 9. The liquid liquid B is fed by check valve 12 fluid under working pressure from the cavity A. In conjunction with the animation. The 11-fluid chamber B presents a hydraulic spring (elastic return) interacting with the stepped plunger 10 and the cylinder of the hydraulic cylinder 9. The moving parts of the vibration exciter are closed by an elastic bellows housing 13. The vibrating rumble screen operates as follows. Under the pressure of the working fluid coming from the pump 1 through the high pressure hose 8 into the working cavity L of the exciter 5, the stepped plunger Yu and the hydraulic cylinder housing 9, as well as the associated bodies of the boxes with sieves, move. When the stepped plunger 10 and the body of hydraulic cylinder 9 are mutually displaced, the multi-friction plunger 4 of the cylinder 11 is inserted inside the zimkuty fluid chamber of B, C RS: this causes the compression of the scaffolding located there and the accumulation of potential energy for the next turn. When the set pressure value P .. is reached, the hydro-pulse valve-pulsator 7 is activated and reports the hydraulic system with a drain. The hydraulic spring is discharged, the volume of compressed x liquid in chamber B. In this case, the multiplier plunger 11 under the action of pressure in the closed chamber B acts on the hydro-cylinder body 9, conjugated with the stepped plunger 1O, having mutually displaced them and associated rumble boxes . After the working fluid flows out of the working cavity A, the pressure in the hydraulic system drops and the hydraulic pulse valve 7 closes, i.e., switches to the next operation center. As a result of consecutive periodic impulses of charging and discharging the hydraulic spring arranged in the stepped plunger 10, mutual oscillatory movement of the duct bodies with sieves with which the mobile elements of the exciter are rigidly connected will occur. By selecting the appropriate flow rate of the working fluid and adjusting the response pressure of the valve-pulsator 7, the frequency and amplitude of oscillations of the actuators, as well as the disturbing forces applied to them, can be varied within wide limits. The ability to smoothly change the parameters of a hydraulic drive allows you to select the optimal modes of vibration depending on the physical characteristics of the source material subjected to screening. The invention includes a vibrating screen containing a box with sieves and a vibrating mechanism associated with them, characterized in that, in order to increase the efficiency of screening, the vibrating mechanism is designed as a plunger hydraulic cylinder including a housing, a stepped and a multiplier plungers and a pulsator valve, hydraulically connected with a hydraulic cylinder, with one end of the cartoon