SU40927A1 - Device for automatic opening and closing of ventilation doors in mines - Google Patents

Description

Ventilation doors are used in mines in order to divide the total ventilation air flow to bring it to the desired points in the required amount. Since, however, even in those roads where ventilation doors are required, transportation of the material being developed must occur, the success of the work depends largely on the correct and reliable opening and closing of the ventilation doors. Until now, to mechanize the process of opening and closing doors, they use almost exclusively mechanical drives consisting of stops for the trolley, kinematically connected with the doors in such a way that when the trolley, approaching the door, hits the corresponding stop, the doors open, and after passing through the carriage, the door is closed again, either in a similar manner by means of a stop or with the help of additional means (for example, a spring). Such devices are complex, as they usually have a large number of moving parts that can easily be damaged, clogged .. and so on. Therefore, they are unreliable in operation and require frequent repair. In addition, for opening and closing doors; with the help of -Mehash sherds chgd | eeb} &

(28)

the significant energy that the trolley drive must deliver.

According to the invention, it is proposed to use for itself the opening and closing of the doors by itself a widely known method of actuating any mechanism using a relay connected to the anode circuit of an electron tube, the grid circuit of which includes electrodes forming a capacitor whose capacitance changes as it approaches an object to them, which makes it possible to operate the installation without directly touching any of its parts. These electrodes, which form capacitors, are installed Anywhere in the cross section of the gateway, near the door. When occurring near a mine transport door, such as a trolley, the capacity of the system changes and the relay switches on the electric motor. The only available external parts of the device are electrodes that can be reliably protected from damage; in addition, they can be installed in the safest location of the drift cross-section, for example, at the top. The speed and sensitivity can be adjusted to very wide limits.

The essence of the invention consists in the special form of the implementation of such a device and consists in applying to each door three electrode systems that ensure the opening of the door, its blocking at the moment of passing the transport and closing after the passage of the latter.

In FIG. 1 is a circuit diagram of a device for actuating an electromagnetic relay; FIG. 2 shows the location of electrodes in the drift in perspective; FIG. 3- electric circuit of the device for bringing the door in motion.

The device consists (Fig. 1) of an electrode lamp /, a power supply transformer 2, an oscillating circuit 3, a bias device 4, a relay 5, and an electrode system b located in the drift. The device is regulated so that, in the absence of foreign bodies near the electrodes 6, a small current is circulated in the anode circuit, which is insufficient to activate relay 5. In the case of additional bodies, for example, a person with a trolley, the system capacity the electrodes vary (increase), the mode of operation of the electron tube changes, and the anode current increases so much that it is sufficient to drive the relay.

Three electrode systems are installed for each door. This achieves the following order in two-way traffic: 1) the trolley reaches the control zone — the door opens, 2) the door cannot close when the doorway passes, and 3) when the trolley is removed from the control zone, the door closes.

FIG. 2 shows the arrangement of the electrode systems, with the movement conventionally adopted in the direction indicated by the arrow. Here is the 7-electrode system of the first control zone; "S-system electrds of the second control zone; 9-electrode system of the third control zone; 7 (7, // and / 2-lamp devices, the circuit of which is shown in Fig. 1; 13 is a device for driving the door. The electrical diagram of the latter is shown in

FIG. 3, where the following notation is entered: 14-relay of the first control zone, controlling contact 75; 76-constant resistance; 17 — power supply chain clamps; 18 relays controlling pins 19 and 20; 21 relays of the third control zone, controlling contact 22; 23-relay of the second control zone, controlling contacts 24 and 25;

26- motor drive winding;

27 switch; 28- measles engine; 29 - autoswitch; 30 - power supply terminal; 57, 5255 and 5-contacts autoswitch 27; 55, 55, 57, 38, 39 to 40 - switch contacts; 41 - power supply terminal.

The operation of the entire system is as follows. In the absence of transport in the control zones of measles, relays 14, 27, 25 are pulled away by springs and contacts 75, 22, 24 and 25 are closed. The winding of the relay 18 is shunted and the amount of current in the circuit 77 is determined by the resistance 16. Since the relay 18 is not energized, it is erased by the spring, contacts 19 and 20 are open and the motor circuit is interrupted in two places. Approaching the door, the trolley approaches the first control zone. This increases the current in the winding of the relay 14, which attracts its measles, as a result of which the contact 15 opens. Opening contact 15 stops shunting the winding of relay 18, magnets the core of the latter and attracts its bark, closing contacts 19 and 20. Thereby the motor turns on and the current circulates through the circuit: terminal 30, contact 19, contact 24, contacts 55 and 52 switch motor winding, contacts 40, 35, 37 of the autoswitch 29, engine rotor 28, contacts 38, 36 and 5P of the switch 29 and clamp 41. The motor rotates and opens the shaft door. As soon as the door is completely open, the device associated with it moves the autoswitch 27 from position 52-55 to position 57-34 and the autoswitch 29 from position 55-40, 36-38, 24-26 to position 37-39.38-40 Upon further movement, the car will be in the second control zone, which will entail the excitation of relay 25, which is against measles, opening contacts 24 and 25. Opening the contacts and 25 prevents the engine from being activated all the time while the car passes doorway zone. As the doorway passes and is removed from the second control zone, which extends from both sides of the door, contacts 24 and 25 are closed again. The car gets into the third control zone, which entails the excitation of the relay 21 and the opening of the contact 22.

An action similar to that which occurred during the passage through the first control zone occurs, namely, relay 18 is energized and contacts 19k20 close. The motor circuit is restored again and the current circulates in the circuit: terminal 30, contacts 31 and 34 of switch 27, contact 25, contact 20, motor excitation winding 26, contacts 40 and 38 of the autoswitch 29, engine rotor 28, contacts 57 and 39 and finally clip 41. In this case, the engine rotates in the opposite direction and the door closes. Operation takes place when a three-phase motor or a direct current motor is installed. When the door is completely closed, the switches turn and close the initial position.

The advantages of the system in comparison with the existing ones are as follows: the impact occurs without any direct contact of the person or the trolley with any parts of the device, thus eliminating the possibility of any breakdowns and damage from impact, shock, etc. available

the outer parts of the device consist of only electrode plates that can be covered; Finally, the system's speed and sensitivity can be adjusted within very wide limits, depending on the requirements. This ensures proper ventilation and the ability to move the trains without slowing down in front of the door. For greater security, well-known lamps are installed at the door.

The subject matter of the invention.

Claims (2)

1. Device for automatic opening and closing of ventilation doors in mines with the application for switching on and switching off the electric drive motor for doors of electromagnetic relays included in the anode circuits of electronic tubes, electrodes forming a capacitor, the capacitance of which varies as it approaches mine transport, characterized by the use of each electrode of the three electrode systems, two extreme of which, located on opposite sides of the door, serve to turn on the wire movement The gate, and the middle one, located at the door, is designed to unlock the engine circuit in order to prevent the door from closing during transport. 2. In the device according to claim 1, use an autoswitch controlled by a driving motor that switches the engine to reverse at the end of the door travel in one direction. Figure 1 U {/, g --- -, i y -i-y-Kvfgj.