SU623180A1 - Pneumatic two-point regulator - Google Patents

Description

The invention is fire resistant to the avgomagichesky control.

. The pneumatic two-position regulators with posterior hysteresis are contained in the upper and lower level signalizers, the inputs of which are connected to input channels, and the reverse node p.J.

However, the dynamic accuracy of such regupors is low.

Such pneumatic two-pitch regulators with inverse hysteresis are known, which contain signaling devices of the upper and lower levels, the inputs of which are connected to the input channels, and logic block 2.

Such adjustments are complex,

In order to simplify the design, in a downstream controller containing signaling devices of the upper and lower levels of the dead zone, which are connected to the input channels of the controller, the logic unit consists of two three-membrane relays. The first flow through and the second control panel of the chamber of the first and second

three-membrane relays, respectively, are connected to the output of the upper level detector, the first flow and second control chambers of the second and first three-membrane turnips, respectively, are connected to the output of this lower-level analyzer. The second flow chambers of three-membrane turnips are connected to the atmosphere. The nozzles of the first three-membrane relay are connected to the first control cameras of the three-membrane turnips, and the nozzles of the second relay are connected to the output channel of the regulator.

Claims (1)

In order to expand the functionality in the proposed regulator of the nozzle of the second turnip of the logic unit, they are connected with the output channel, the regulator channel through a circuit containing a choke and two single-membrane elements with a spring in a deaf chamber. The chamber of the first single-membrane element is connected to the nozzles of the second three-membrane turnip, the chamber and the nozzle of the second single-membrane element are deafly connected to the atmosphere, and their flow-through chambers are connected to the power supply channel and directly to the regutxgor channel. This allows you to set the levels of the value corresponding to the nupu and range of the output signal of the controller. The basic circuit diagram of the controller is attached to the drawing. The social controller controls the signaling devices of the upper 1 and lower 2 levels, logical block 3, consisting of three-membrane relays 4 and 5, one-membrane elements 6 and 7 with scimage, and cross-link 8. Signals of sensors 1 and 2 are connected with channels of adjustable magnitude P and ask P „. The output of the indicator 1 is connected to the first flow-through and second control cameras of relay 4 and 5, respectively, the output of the indicator 2 is connected to the second control and first flow-through cameras of relay 4 and 5, respectively, whose second flow-through chambers are connected to the atmosphere. Both sopperepe 4s are connected with the first control coglera of both turnips, and both nozzles of turnip 5 are connected to the output of the unit 3 and to the deaf chamber of the anomembrane element 6, the chamber of the element 7 with a spring is connected to the atmosphere. The nozzles of these elements are connected with the atmosphere, and the flow chambers through the throttle 8 with the feed channel and directly to the output channel. Regup - The regulator works as follows. Signaling devices 1 and 2 are adjusted so that when the controlled parameter deviates from the set value by more than the specified value. the value of D, at the output of the corresponding signalizer, a signal O appears (D is half the deadband). Then, in accordance with the circuit diagram of the regulator with a cyclic, change of the adjustable parameter relative to the task by an amount greater than D, the change in the output signal of the logic unit shaft occurs any time when the regulable parameter rises to the specified value and falls within the zone insensitivity. In this case, a logical unit signal appears with increasing, and a logical zero - with a decrease in the controlled variable. Since elements 6, 7 and 8 are connected according to the minimum selection scheme, then the unit 6 4. The output signal of the logic block corresponds to the output pressure of the regulator P, defined by the element shift - OUT 7, and the zero pressure is determined by the rotation of the element 8. Logical the block of the proposed controller contains two elements (instead of eight in the prototype), and the ability to adjust the boundary values of the output sypnal allows for an improvement in the quality of regulation. Claim 1. Pneumatic two-position regulator containing upper and lower level alarms, the inputs of which are connected to input channels, and a logic unit, characterized in that, in order to simplify the regulator, in it the logic unit contains two three-membrane relays; the first flow and second control chambers of the first and second three-membrane relays, respectively. are connected to the output of the upper level detector, the second control and the first flow chambers of the first and second three-membrane relays are respectively connected to the output of the lower level detector; The second flow chambers of three-membrane relays are connected to the atmosphere, and their first control chambers are connected to the nozzles of the first three-membrane relay. 2, the Regulator under item 1, about tl and h and y and with the fact that in it the throttle and two single-membrane elements with a spring in a deaf chamber are installed; The deaf chamber of the first evaluating diaphragm element is connected to the nozzles of the second three diaphragm turnip, the deaf chamber and the nozzle of the second evaluating diaphragm element are connected to the atmosphere, and their flow chambers are connected directly to the output channel of the regulator and through the choke to the supply channel. . Sources of information taken into account during the examination: 1. USSR author's certificate No. 341О11, М., кп 2 Q О5 В 11/54, 1969. 2, Application No. 2136441/24 from 12.О5.75, according to which This is a decision to issue an author's certificate. s