SU1539733A1 - Flow rate control device - Google Patents

Abstract

The invention relates to automation of production processes, in particular, to flow control devices. The purpose of the invention is to increase the reliability of the device by eliminating the sticking of the shutter and adjusting the response time to closing. The device for controlling the flow includes a housing 1, an input 2 and an output 3 cavity, a saddle 4, a shutter 5 made in the form of a cylindrical element with a central hole 6, an electromagnetic coil 7, a discrete signal sensor 8, a spring 9, a core 10, an auxiliary shutter 11, control cavity 12, calibrated annular gap - throttling element 13, annular protrusion - stop 14, adjustable choke 15, elastic gaskets. 2 hp f-ly, 2 ill.

Description

Fig 7

5 j

315

This invention relates to a means of automating manufacturing processes, in particular, devices for controlling flow.

The purpose of the invention is to increase the reliability of the device by eliminating the sticking of the shutter and adjusting the response time to closure.

NP fig, 1 given the device, the cut; Fig. 2 shows the central part of the device (on an enlarged scale).

The device includes a housing 1, between the input 2 and output 3 of which the seat 4 is installed, the shutter of which is made in the form of a cylindrical element 5 with a central hole 6 "An electromagnetic coil 7 is installed on the case, electrically connected to the sensor 8 of a discrete signal. Spring-loaded 9 core 10 of the electromagnetic coil 7 is rigidly connected to the auxiliary gate

11, the seat of which is the ralios port 6. The cylindrical shutter 5 is installed between the inlet cavity 2 and the control cavity 12 and forms a calibrated annular gap with the housing - a throttling element 13 that is intended to throttle the working medium flowing from the inlet cavity 2 into the control cavity 12, and provided with an annular protrusion-stop 14, in the wall of the latter there is a hole in which an adjustable choke 15 is installed.

To increase the density of the abutment of the annular protrusion-stop 14 against the upper wall of the control cavity 12, the protrusion-stop 14 and the upper wall of the control cavity 12 can be equipped with elastic pads 1b and G / (Fig. 2).

The device works as follows.

In the absence of an electrical signal from the sensor 8 of the electromagnet, the coil 7 is de-energized, the core 10 under the action of the spring 9 and the force of its own weight is in the lower position and the auxiliary gate 1I closes the hole 6 of the gate 5. The working medium enters the input cavity 2 under the gate 5 and through the annular calibrated gap 13 - into the control cavity 12. In view of the difference in effective areas

Q

50

0

five

0

five

five

0

five

above shutter 5 and below it, the latter is in the lower position and closes the passage of the working medium.

When voltage is applied to the electromagnetic coil 7, the core 10 rises, the auxiliary shutter 11 opens the hole b. The working medium from the control cavity 12 is directed through the hole b to the exit. The pressure in this cavity is impacted and under the action of pressure from below, the shutter 5 rises - the saddle 4 is open. The gap 13 is calibrated so that the flow rate of the working medium through it is less than through the hole b.

When raising the bolt 5 with its annular protrusion-abutment 14 rests against the upper wall of the control cavity 12, the PLOTTER connection is formed with it (to increase the density of this connection, the upper plane of the annular protrusion-abutment 14 and the upper wall of the cavity 12 can be equipped with elastic pads 16 and 17 ).

The gap 13 is calibrated, and the throttle 15 is adjusted so that the flow of the working medium through them is less than through the opening 6, therefore the pressure from the bottom of the shutter 5 is greater than the top, the saddle 4 is open.

When a predetermined flow rate is reached, the sensor 3 is triggered and the winding of the electromagnetic coil 7 de-energizes, the core 10 is lowered, the auxiliary gate 11 closes the opening 6. The working medium filling the control cavity 12 above the gate 5 through the gap 13 and the throttle 15 increases the pressure in this cavity and the shutter 5 is lowered, closing the passage of the working environment.

The response time of the device to closure depends on the filling time and the working medium of the control cavity 12, which in turn is determined by the throttle cross section 1b (the larger it is, the faster the device operates; the smaller it is, the slower the filling of the cavity 12, and the closing time of the device is increased).

The device, due to the presence of a cylindrical protrusion I4 with an adjustable throttle 15 on the shutter 5, provides control of the response time, the device has 6ojffee high reliability and wider functionality, as it can be used

as the batcher with doses of working environments.

adjustable

Claims (3)

Invention Formula 1 o A device for controlling flow, comprising a housing, between the inlet and outlet cavities of which there is a seat, the closure of which is made in the form of a cylindrical element with a central hole, forming a control cavity with the case, and with the walls of the inlet chamber - a calibrated ring in the form of an annular calibrated a gap mounted on the housing of an electromagnetic coil electrically connected to a discrete signal sensor, the core of which is rigidly connected to the auxiliary 733 A torsional shutter, the seat of which is the central opening of the cylindrical element, characterized in that, in order to increase the reliability of the device by eliminating the sticking of the shutter and adjusting its response time to closing, the front surface of the cylindrical element on the control cavity side is provided with an annular protrusion-stop, in the wall of which a hole is made, in which an adjustable choke is installed. 2. The device according to p. Is distinguished by the fact that an elastic gasket is installed on the annular protrusion-stop. 3. The device according to p. Is distinguished by the fact that an elastic gasket is installed on the surface of the casing at the point of contact with the annular protrusion-abutment. 12 eleven 15 14 eleven 2