Control circuit for safety protection of filter press

Abstract

The invention discloses a control circuit for safety protection of a filter press. The control circuit comprises a plurality of switch contacts, a plurality of relays, two buzzers, an infrared grating, an electric contact pressure gauge, a laser limiter and a rapid pressure discharge electromagnetic valve, the control circuit is divided into two independent circuits and comprises a control circuita and a control circuit b which work at the same time. The switch contacts include a normally-open switch contact, a normally-closed switch contact and a time-delay closing switch contact according to functional requirements, the relays include an intermediate relay, a time relay and an intermediate relay for controlling a pull plate, the infrared grating and the electric contact pressure gauge are designed on the basis of the relay principle, and a circuit diagram is embodied in a relay mode. Compared with the prior art, the control circuit for safety protection of a filter press has the advantage that the damage of equipment to a human body can be effectively reduced during the operation of the equipment. Economic and property losses caused by explosion can be avoided when equipment isoperated by mistake. The electric appliance principle is simple, operation is reliable, and existing mechanical equipment does not need to be changed.

Description

technical field [0001] The invention relates to machinery manufacturing safety production equipment, in particular to a control circuit for safety protection of a filter press. Background technique [0002] Presently known filter press is made up of frame, filter plate, automatic drawing plate, hydraulic pressure and electrical part. The working procedure is the periodical operation of machine head compression, pressure keeping, filtration, flow through, pressing, machine head loosening, unloading, and then machine head compression. However, the increase of the air inlet pressure during the flow-through process cannot guarantee that the filter plate will pop out instantaneously due to excessive air pressure, resulting in an explosion accident. During the unloading process, the automatic pull plate unloading, and the on-site operation of personnel, due to the lack of reliable protection, pose a great threat to personal injuries such as pinching hands. Contents of the inven...

AI Technical Summary

Problems solved by technology

However, the increase of the inlet air pressure during the flow-through process cannot guarantee that the filter plate will pop out instantly due to the excessive air pressure, and an explosion accident will occur

During the unloading process, the automatic plate unloading and on-site operation of personnel pose a great threat to personal injuries such as pinching hands due to lack of reliable protection.

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