SU1403134A1 - Pneumatically actuated switch - Google Patents

Abstract

The invention relates to electrical engineering, in particular, to pneumatic switches. The purpose of the invention is to simplify the adjustment AND cost saving. bochnogo body. When the pressure in chamber 13 is increased, the piston 4 acts on the rod 1, tears it off the retainer 26 and raises it. The rod 14 with the disk 17 acts on the contact unit 21. The plate 9 sits on the stop 11 and opens the opening 6, connecting the chamber 13 and 16. When the pressure decreases, the rod 14 under the action of the return spring 18 is pulled off the clamp 23 and returns to the initial state. Camera 16 through channel 27 communicates with the environment. 1 hp f-ly, 1 ill.

Description

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11403134

refers to electrose neither 20

technology, c. particular to the pneumatic switch m.

The purpose of the invention is to simplify adjustment and improve efficiency by reducing consumption.

The drawing shows a pneumatic switch, a general view.

The body consists of lower, middle 2, upper 3 parts. In the lower part 1, the piston 4 of the pneumatic actuator is placed;

In the lower part 1 of the housing between the piston 4 and the plate 9 there is a stop 11, as well as an inlet 12 connected to the chamber 13 of the piston 4. In the upper part 3 of the housing there is a pneumatic actuator 14, sealed by a cuff 15. The stem chamber 16 and the chamber The 13 pistons are connected by channel 6. On the rod 14 there is placed a disk 17 loaded with a return spring 18. It is mounted under the bracket 19 fixed on the housing. The disk is placed against the rock 20 of the contact node 21, mounted on the bracket 19.

; In the upper part 3 of the housing two fixing units are installed, one of which is placed against the radial ditch and 22 of the stem 14, the other is above and is replaced by the stroke of the shaft. The stem fixation assembly consists of a ball 23, a pusher 24 of a spring 25 and an adjusting nut 26, a stem 14 in the lower part is made with a calibration channel 27, which in the initial state is located in the shaft 16 of the shaft and the output is connected to the environment . The volume / of this chamber is increased by connecting to the nozzle 28 an additional chamber 29 located outside the housing.

The device works as follows.

The compressed air supplied from the inlet 12 to the chamber 13 of the piston acts on the bottom end of the piston 4. At the pressure of compressed air close to the setpoint of actuation, the piston 4 and the rod 14 are displaced up to the entrance of the ball 23 of the lower fixation unit 14 into the groove 22 of the rod 14. the displacement of the moving system does not reflect on the position of the contacts of the contact

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node 21, since there is no change in the nature of the interaction between the roller 20 and the disk 17.

Under the action of compressed air and the spring 10, the plate 9 of the valve mechanism follows the sleeve 8, remaining in cooperation with it and ensuring tightness. When the pressure of the compressed air is further increased and the setpoint of the actuator -v or actuator reaches its value, the force of its impact on the piston 4, the total force of the return spring 18 and the force of the lower fixation unit spring brought to the axis of the shaft 14 is balanced.

There is a breakdown of the ball 23 from the locking groove 22 and moving upward of the moving system. In this case, the displacement of the tray 9 following the saddle 8 is carried out before it hangs on the support 11. After this, the channel 6 opens and the compressed air from the piston chamber 13 through the calibrated section 7 enters the stem chamber 16 and the additional chamber 29 connected to it.

Since the rod is placed at the top, the inlet of the channel 27 moves above the cuff 15, eliminating the message of the rod chamber 27 to the environment. By selecting the diameter of the calibrated section 7, the volume of the chamber 16 and the additional chamber 29, the initial force of the unloading piston 4 is minimized due to the pressure in the brush chamber 16, which allows the piston 4 to displace the rod 14 upwards and lock it in the upper position due to the groove 22 on the ball 23 of the upper bridle fixation.

After the pressure ,, equal to the pressure of compressed air is established in the chamber 16 of the rod and the additional chamber 29, the piston 4 is completely unloaded in the chamber 13 of the piston. The rod 14 is held in its upper position by the upper fixation unit by selecting its spring 25 force. In this case, the disk 17 of the stem 14, acting on the roller 20 of the contact node, opens the contacts.

When the Compressed air pressure is lowered and its return setpoint value is reached, the force of the return spring 18 exceeds the totalized opposing force of the compressed air on the rod 14 and the upper fixing unit. This leads to the breakdown of the rod from the upper ball. Under-

Vision system is shifted down. When the seat 8 is seated on the plate 9, the message of the piston chamber 13 and the stem chamber 16 stops. When the groove 22 of the stem 14 approaches the ball 23 of the lower fixation unit, the input of the calibrating channel 27 shifts below the cuff 15, whereby the stem chamber 16 is in communication with the atmosphere.

The discharge rate of the chamber 16 of the rod and the additional chamber 29 is chosen so that the pressure release does not affect the ability of the switch to fix the moving system on the ball 23 of the lower fixing unit. In this case, the disk 17, together with the rod 14, is displaced downward, excluding its effect on the roller 20 of the contact assembly 21, and its contacts are opened. The switch is prepared for a new work cycle. If necessary, to have a closing contact, the disk 17 is rotated 180 °,

In the switch, the settings are controlled by two locking knots. The adjustment is carried out by changing the tightening of the springs 25 fixing units. The possibility of a false actuation of the pneumatic actuator is eliminated by the delay in filling and discharging the chamber 16 of the rod using calibration channels and the fact that the valve mechanism 9 opens and closes instantaneously when moving up or down due to the support 11 of the housing 1. At the same time, there is the excessive force determined by the spring 10 and the action of pressure of compressed air on the plate 11.

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providing preload plates to the saddle 8, eliminating leakage.

Claims (2)

1. A pneumatic switch comprising a housing, a piston, a rod with a latch, a return spring, a contact assembly, a valve mechanism, a piston and a rod are installed coaxially in the housing so that the stem chamber 1 on the piston end side abuts against the shaft a piston on the side of the opposite end of the piston, the piston being arranged to act on the rod, and the stem being arranged to act on the contact assembly, characterized in that, in order to simplify adjustment and increase efficiency by reducing p It is equipped with an additional fixation unit, displaced along the axis of the rod relative to the main fixation unit by the amount of the piston stroke in the piston, has a channel having a calibrated section connecting the piston chamber with the stem chamber and closed in the initial state from the side of the piston yarn indicated by the valve mechanism, and the rod is made with a calibrated channel designed to connect, in the initial state, the chamber 25 of the rod with the environment, 2. Switch pop.1, which differs in that it is equipped with an additional camera connected to the stem chamber. five 0