SU1485205A1 - Data input unit - Google Patents

Description

The invention relates to automatic regulation and can be used to control the flow of gases. The purpose of the invention is to improve the accuracy of the regulator and the expansion of the range of cost control. The gas flow regulator includes a housing 1, a membrane 2 with a rigid center, an inlet chamber 3 of the housing, an output chamber 4 of the housing, a rod 5, a variable load 6, a flap 7, a nozzle 8, inlets 9, 10 into the cavity of the housing, which specifies the throttle 11, the socket 12 , elastic ring 13. 1 c.p. f-ly, 1 ill.

3

1485205

four

The invention relates to the automatic regulation of the flow of gases.

The purpose of the invention is to improve the accuracy of the regulator and the expansion of the range of cost control. five

The drawing shows the flow regulator, a longitudinal section.

The regulator includes a housing 1, a membrane 2 with a rigid center, an inlet chamber 3, an output chamber 4, a rod 5, a variable load 6, a flap 7, a nozzle 8, inlets 9 and 10, defining a throttle 11, a socket 12, an elastic ring 13.

Δ (ΔΡ) = - 'Pout ·

kh

(1) 5 * .— 5 <

where ΔΡ is the specified pressure drop, kPa; Pout - the pressure at the outlet of the regulator, kPa;

2

8] - nozzle orifice area, m 5 * —effective membrane area,

The regulator works as follows.

In the initial state in the absence of input pressure, the rod 5 abuts against the bottom of the socket 12 and the elastic ring is not under load. The valve 7 does not close the nozzle 8 and in the chambers 3 and 4 there will be external pressure. When the regulator is turned on, the pressure increases in chamber 3 abruptly, and in chamber 4 - gradually. The pressure drop on the membrane will be greater than the specified load, and it rises until it stops, locking the nozzle. When the pressure drop across the membrane drops to the set value, the membrane will drop so much that the set flow rate is established in the output tube. With an increase in external resistance, the flow rate at the outlet will first decrease and as a result, the pressure in chamber 4 will increase. The differential pressure on the membrane will decrease and it will drop, opening the exit nozzle.

To reduce the influence of the angle between the axes of the nozzle and the flap on the flow rate, the bearing seat is centered. To reduce friction, the socket is made of Teflon with an annular gap between it and the stem.

Error maintaining a given flow rate is determined by the expression

15

20

25

thirty

35

Editor S. Baker Order 3032/45

m>

K - coefficient of elasticity of the valve, N / m;

X - the displacement of the membrane from the nozzle, caused by the need to compensate for the increase in pressure at the outlet of the regulator, m.

For low gas consumption at vypolΛ

inequality> 10 ³ and the appropriate selection of the coefficient K controller provides high accuracy.

Claims (2)

Claim 1. The gas flow regulator, comprising a housing with inlet and outlet channels, divided into two chambers with a rigid center diaphragm, with a stem, a load and an elastic ring, while the stem is axially displaced relative to the base of the chamber, and the inlet chamber is connected by pipeline through a choke output, characterized in that, in order to improve the accuracy of the regulator and expand the range of flow control, the rod is placed in the centering support socket located at the base of the inlet chamber, and the elastic shell tso performed sluggish. 2. The regulator for π. 1, characterized in that the walls of the socket are made of Teflon and there is an annular gap between them and the stem.