SU808193A1 - Unit for feeding liquid casting binder - Google Patents

Description

(54) INSTALLATION FOR SUBMITTING A LIQUID CASTING FIXER

The invention relates to foundry, in particular, to equipment for transporting liquid foundry fasteners, liquid glass. A known pneumatic installation for transferring liquid glass through a pipeline, comprising a working reservoir connected by means of pipelines to a vessel for moving liquid glass with compressed air and a container for receiving and dispensing liquid glass. In case of emergency situations, the installation does not ensure the cessation of the overflow of liquid glass through pipelines connecting the cavity of vessels with the atmosphere, which leads to an overrun: liquid glass and the need for a labor-intensive operation to collect the piercer from the floor, shop. The purpose of the invention is the elimination of the overflow of the keeper in emergency situations. This goal is achieved by the fact that the vessel for moving the fastener - liquid glass - with compressed air and the reservoir for receiving and issuing the fastener are equipped with devices for automatically stopping the overflow of the fastener, each of which includes a piston with a rod placed in a housing having a ring in its lower part, and a two-arm lever fixed on the bracket axis, a counterweight is mounted on one end of it; and the other end, on which the vessel for draining the keeper is suspended, is connected to the valve stem, the outer surface of the piston being made with vertical grooves for exiting the air. spirit or fastener. The inner diameter of the uncut portion of the piston is larger than the inner diameter of the ring. FIG. 1 shows schematically the proposed installation; in fig. 2 - the same general view; FIG. 3 is a view A of FIG. 2; in fig. 4 is a section bB of FIG. 2} of FIG. 5 shows a section B-B in FIG. 2. The installation contains working reserve-. Voir If connected by pipelines with valve 2 and cranes 3 and 4 with pneumatic actuators with vessels 5 and 6 for trans-. batch glass of liquid glass with compressed air, which through pipe 7 with check valves 8 and 9 and veins, with type 10 are connected to reservoir 11 for receiving and dispensing liquid glass. Vessels 5 and 6 and reservoir 11 are provided with level indicators 12-15 and

devices for automatic conversion of liquid glass overflow. Vessels 5 and 6 are connected by means of pipelines with taps 16 and 17 with pneumatic actuators to the main 18 and compressed air. In addition, vessels 5 and 6 through pipes 19 and 20 with valves 21 and 22 with pneumatic actuators / communicated with the atmosphere. The reservoir 11 is in communication with the atmosphere through a pipe 23 and is equipped with a valve 24 for supplying liquid glass from the reservoir to the consumer. Each of the devices for automatically stopping the overflow of liquid glass includes a housing 25, in which a piston 26 with shtoksm 27. is located. A ring 28 is fixed to the lower part of the housing. A rubber ring 29 is glued to the lower end of the piston 26. 3) the cross-section of the Tein 31 is secured by a double-arm lever 32, at one end of which a counterweight 33 is mounted, and the other end is connected to the valve stem 27 via an axis 34. At this end, the vessel 35 is suspended for draining the keeper. The outer surface of the piston 26 is made with vertical grooves for the release of air or the fixture, and the internal diameter of the uncut portion of the piston 26 is larger than the internal diameter of the ring 28.

The installation works in the following way.

The working tank 1 is filled with a fixer (liquid glass). Manually open the valve 2, press the start button - open the valves 3 and 22 with pneumatic actuators. Liquid glass begins to fill vessel 5 until the upper level sensor gives a signal to close valves 3 and 22, open valves 4, 16 and 21 with pneumatic drives — liquid glass is expelled from vessel 5 to tank 11 and simultaneously fills 6 to As long as the level sensor 13 gives a signal to close the valves 4 and 21. The duration of the sweep of the liquid glass from the vessel 5 to the tank 11 is monitored by a time relay adjusted for a certain time interval. After the time has elapsed, it gives a signal to close the valve 16, open the valve 17, (3.22 - the filling begins with .cyia 5 and the liquid glass is expelled from the vessel 6 into the reservoir 11. The cycle repeats.

When the upper level in the tank 11 is reached, the upper level indicator 14 gives a signal to close the valves 4,3,22,16,17 and 21. The pneumatic actuator valve 24 serves to take the glass from the tank 11. When the liquid glass reaches the lower level in the tank 11 The level indicator 15 gives a command to close the crane 24.

The check valve 8 is designed to prevent the vessel 5 from squeezing when squeezing liquid glass from the vessel 6. The check valve 9 prevents liquid glass from entering the vessel 6 when squeezing 5 from the vessel 5.

 In case of emergency (level indicators 12-15 do not work and do not give a signal to close the taps

 3,4, 16,17,21 and 22 due to breakage of electrical wiring, lack of contact of the wire with the level indicator, liquid glass sticking to the indicator rod, level) liquid glass through the pipeline 19,20 and 23 through the slots in the piston 26 (FIG. 3) and the inner opening of the ring 28 fills the vessel 35. Under the force of gravity, the end of the two shoulders lever 32 moves down along with the rod 27 and the piston 26, which closes the inner opening of the ring 28 and the overflow of liquid glass is stopped.

five . To return to the initial position of the components and parts of the device for automatically stopping the overflow of liquid glass in the tank 11, manually shut off the valve 10, open

- valve 24 and part of the liquid glass is supplied to the consumer. The remaining part of the liquid glass will flow out of the pipe 23 into the vessel 35 if the rod 27 with the piston 26 is moved upwards.

The proposed installation allows to prevent overfilling of the fastener through pipelines connecting the cavity of vessels with the atmosphere, to economically expend the fastener, to eliminate the time-consuming operation to collect the spilled fastener from the floor of the workshop.

Claims (1)

Invention Formula An installation for supplying a liquid casting fixture containing a working tank connected by means of pipelines / vessel for moving the fixture with compressed air and a reservoir for receiving and dispensing the fixture, characterized in that, in order to eliminate the fixture overflow in emergency situations, the container for displacing the fixture is compressed air and a reservoir for receiving the delivery of the fastener are equipped with devices for automatically stopping the overflow of the fastener, each of which includes a piston with a rod, placed in the housing, having a ring in the lower part, and fixed, on the bracket axis, a two-armed lever, on one end of which is installed a | TIVweight, and the other end carrying vessel for draining, connected 58081936 with valve stem, with external sources of information, The surface of the piston is made with a verti-tip, taken into account in the examination of the external slots for air outlet 1, Foundry, 1961, or krepitel. 1, s. 36 Compressed 7 I i ibi No L) 4 t FIG. one  / Visa 26 Fig.Z Bb