RU156250U1 - AUTOMATED CONTROL SYSTEM FOR SPEEDING CUT-OFF VALVES - Google Patents

Abstract

An automated control system for high-speed shut-off valves installed on the supply lines of a gaseous or liquid medium, comprising: drive electromagnets 20 of these valves, two electromagnets or two windings 21, 22 of one electromagnet 20 for each valve; two-channel independent power supply control circuit of these drive electromagnets 20; electromagnetic control relays 411, 412, 421, 422 installed on each of these control channels 11, 12 with normally open contacts in each the specified power supply circuits; a device for checking the operability of the specified power control circuits and the software and hardware complex 60 that controls the operation of these electromagnetic control relays based on the received commands and signals about the state of the controlled parameters of the facility and control circuits, characterized in that the specified hardware and software complex 60 is additionally equipped with an element 63 for setting periodic switching of the power supply of these channels 11, 12 with a given frequency both in open and in the shut position of the valve, and the block 64 displaying current information about the results of the health check of the corresponding circuit at each power switch; and the specified device for checking the health of power control circuits is made in the form of a separate electronic current indicator 71, 72 of known type for each of these channels 11, 12, connected in series in a controlled circuit.

Description

Technical field

The utility model relates to the field of automated control and can be used to control high-speed shut-off valves installed on the supply lines of a gaseous or liquid medium to technological installations.

In particular, the utility model can be used to control high-speed shut-off valves installed on the supply lines of gaseous or liquid fuel to the combustion chamber of a stationary or transport, including aircraft, gas turbine engine.

State of the art

Many technological processes use equipment that must be turned off (taken out of operation) using high-speed shut-off valves in the event of an emergency.

Known automated control system for high-speed shut-off valves installed on the supply lines of a gaseous or liquid medium, containing:

The driving electromagnets of these valves are two electromagnets or two windings of one electromagnet for each valve;

a two-channel independent power control circuit of said drive electromagnets;

electromagnetic control relays installed on each of these control channels with normally open contacts in each line of these power supply circuits;

a software and hardware complex that controls the operation of these electromagnetic control relays, based on the received commands and signals about the state of the controlled parameters of the facility and control circuits (RU 2451628, B64F 5/00, 2012 [1] - the closest analogue).

As a rule, high-speed shut-off valves are installed on the lines of critical facilities, and therefore, their reliability control systems are subject to increased reliability requirements. In relation to power plants with gas turbine engines, the reason for generating an emergency shutdown command for fuel supply lines may be, for example, damage to the generator, the gas turbine engine itself or the extinction of the flame in its combustion chamber. In addition, it is important to exclude the possibility of triggering protection against accidental false signals, which is achieved by introducing permission to operate the control relay only when two independent commands are received. It is also necessary to periodically monitor the serviceability of relay elements and circuits of the specified control system, for which purpose a corresponding device is provided in [1].

According to [1], the specified device for checking the operability of power supply circuits involves the use of signals of indicators of communication, which are used as a display screen or LEDs connected one to each winding of the drive electromagnet.

The disadvantages of such a technical solution include the relatively low level of operational reliability of the test, since the specified device is used to verify the correctness of the transfer of commands to the executive devices only at the stage of putting the control system into operation. Operational control of power supply circuits of drive electromagnets according to [1] is not performed.

Utility Model Disclosure

The objective of the utility model is to increase the reliability of the control system of high-speed shut-off valves, and the technical results are to provide the maximum possible technical specifications for the frequency of operational testing of the functioning of relay elements and control circuits, as well as to increase the reliability and convenience of indicating the results of this test.

The solution of this problem and the achievement of the indicated technical results associated with its solution is ensured by the fact that in the automated control system of high-speed shut-off valves installed on the supply lines of a gaseous or liquid medium, containing:

driving electromagnets of these valves, two electromagnets or two windings of one electromagnet for each valve;

a two-channel independent power control circuit of said drive electromagnets;

electromagnetic control relays installed on each of these control channels with normally open contacts in each line of these power supply circuits;

a device for checking the health of these power circuits and

a software and hardware complex that controls the operation of these electromagnetic control relays, based on the received commands and signals about the state of the controlled parameters of the object and control circuits,

according to the utility model:

said software and hardware complex is additionally equipped with an element for setting periodic switching of the power supply of these channels with a given frequency both in the open and in the closed position of the valve, and a display unit for current information about the results of the health check of the corresponding circuit at each power switch;

and the specified device for checking the health of power circuits is made in the form of a separate for each of these channels electronic current indicator of a known type, connected in series in a controlled circuit.

A causal relationship between the totality of features characterizing the claimed utility model and the technical result achieved by it is as follows:

The use of two drive electromagnets or two windings of one drive electromagnet for each valve and a two-channel independent power supply control circuit for each winding of these drive electromagnets allows one of these circuits to be switched off from operation in order to check its health, including the serviceability of the control relays installed in it.

Providing the software and hardware complex with the element for setting the periodic switching of the power supply of the indicated channels with a given frequency both in the open and in the closed position of the valve allows to increase the reliability of this test by minimizing the time of the inter-test mode with the exception of the possibility of influencing the “human factor” ".

The introduction of the current information on the results of the serviceability check of the corresponding circuit into each program-technical complex of the power supply unit at each switching power supply makes it possible to increase the reliability and convenience of reporting information on the condition of serviceability of the power supply control circuits to valve actuators for the operator to take timely measures to correct the detected malfunction.

The implementation of the device for checking the operability of power circuits in the form of a separate electronic current indicator of a known type for each of the channels included in series in the controlled circuit allows to increase the reliability of checking the serviceability of controlled circuits by using a more reliable informative signal about the occurrence of a malfunction.

Brief Description of the Drawings

In FIG. 1 shows a schematic diagram of an automated control system for high-speed shut-off valves according to a utility model; in FIG. 2 is a block diagram of a software and hardware complex; in FIG. 3 is a diagram of an algorithm for checking the health of a circuit of one of the valve drive control channels with the valve closed; in FIG. 4 - the same with the valve open.

Legend

ACS - automated control system;

BOI - information display unit;

BOK - high-speed shut-off valve;

BP - PTC power supply;

GTE - gas turbine engine;

IU - executive device KU;

KU - control channel;

M - minus power supply;

P - plus power supply;

PB - processor unit PTK;

PTK - software and hardware complex;

TEM - drive electromagnet;

RU - control relay;

UPI - device for checking the operability of power supply circuits KU;

EZP - element of the task for switching power supply;

EIT is an electronic current indicator.

Decoding of the numbering of the positions of the figures

11, 12 - KU; 20 - TEM; 21, 22 - the first and second windings of the TEM; 311, 321 - plus and minus power lines of the first KU; 312, 322 - plus and minus power lines of the second KU; 41, 42 - IU, respectively, of the first and second KU; 411, 412, 421, 422 - electromagnetic switchgears; 51-54 - supply lines of control signals, respectively, A, B, C, D to the windings of the RU from the PTC; 60 - PTK; 61 - PSU; 62 - PB PTK; 621-624 - PTC outputs for connecting control circuits; 625, 626 - PTC inputs for connecting signal supply lines about the condition of serviceability of the power supply circuit of the controlled KU; 63 - EZP; 64 - COMBAT PTK; 71, 72 - EIT; 81, 82 - supply lines to the PB PTK signals about the condition of serviceability of the power supply circuits of the controlled KU.

Detailed description of utility model

The automated control system (ACS) of high-speed shut-off valves (BOC) according to the utility model is discussed below on the example of the BOC installed on the lines for supplying gaseous or liquid fuel to the combustion chamber of a gas turbine engine (GTE).

ACS BOK according to the utility model contains (Fig. 1) two control channels (KU), respectively, the first KU 11 and the second KU 12 of the drive electromagnet (TEM) 20 BOK (not shown), equipped with two independent windings. The first winding 21 is included respectively in the power supply circuit of the first KU 11, the second winding 22 is connected to the second KU 12. Each of these KUs is connected to the positive (P) and negative (M) DC power lines 311 and 321 for KU 11 and 312, respectively 322 - for KU 12. KU 11 and KU 12 are each equipped with their own executive device (IU) 41, 42, respectively, for KU 11 and KU 12. Each of the specified IU includes two electromagnetic control relays (RU), respectively 411, 412 for IU 41 and 421, 422 for the IU 42. The windings of the indicated switchgear are connected by lines 51-54 to the outputs of Gram-technical complex (PTC) 60 (Fig. 2) supplying independent control signals AB, V, G. Normally open contacts RU 51, RU 52 are connected in series in lines 311, 321 of the power supply circuit KU 11. Normally open contacts RU 53, RU 54 are connected in series in lines 312, 322 of the power supply circuit KU 12.

ACS according to the utility model comprises a health check device (UPI) of the power supply circuits KU 11, KU 12. The specified UPS according to the utility model is made as a separate type of electronic current indicator (EIT) 71, 72 (Fig. 1) of a known type, separate for each of these KUs, the sensitive part of which is connected in series to the controlled circuit, respectively, KU 11 and KU 12, and the normally open contact is in line 81, 82, respectively, of supplying to the PTC 60 a signal about the serviceability or malfunction of the controlled control circuit.

PTC 60 (Fig. 2) controls the operation of these electromagnetic switchgears 311, 412, 421, 422, based on the received commands and signals about the state of the controlled parameters of the object and control circuits.

PTK 60 contains:

power supply unit (PSU) 61;

a processor unit (PB) 62 with four outputs 621-624 connected respectively to lines 51-54 (Fig. 1) of signals A, B, C, D of the power supply control to the windings 21, 22 of the FEM 20, and with two inputs 625, 626, respectively connected to lines 81, 82 for supplying signals about the condition of serviceability of the power supply circuit of the controlled KU;

an element of the task of periodic switching (EZP) 63 power supply of these channels with a given frequency in both open and closed position SIDE;

a unit for displaying current information (BOI) 64 about the results of a health check of the corresponding circuit at each power switch.

ACS operation

The work of ACS BOK according to the utility model is as follows. Turning on the BOC in operation is carried out from the operator panel (not shown) by supplying control signals A, B, C, D to KU 11 and KU 12 at the same time through the PTK 60. The BOK can be switched off by simultaneously performing reverse operations also from the operator panel or an alarm is received at the PTC 60, for example, about the extinction of a flame in a gas turbine combustion chamber.

For operational monitoring of the condition of serviceability of the electric circuits KU 11 and KU 12 according to the utility model, an almost continuous alternating "ringing" of the indicated circuits of each KU is made both in the closed and open position of the BOK. Implementation of such a check is possible only under the condition when the simultaneous inclusion of the circuits of both KEM FEM 20 is required to turn on the BOK into operation, and only one KU is not enough to disconnect the BOK from the de-energized circuit.

In FIG. Figures 3 and 4 are diagrams of an algorithm for checking the health of a circuit of one of a control unit or a control unit 12 of a FEM 20, respectively, with the closed and open position of the side assembly.

Industrial applicability

ACS BOK according to the utility model meets the condition of "industrial applicability". Its essence is disclosed in the formula, description and figures of the drawing quite clearly, and the tools used are simple and affordable for industrial implementation in industries using SQS in ACS of various technological processes.

Claims (1)

An automated control system for high-speed shut-off valves installed on the supply lines of a gaseous or liquid medium, containing: drive electromagnets 20 of these valves, two electromagnets or two windings 21, 22 of one electromagnet 20 for each valve; a two-channel independent power control circuit of said drive electromagnets 20; electromagnetic control relays 411, 412, 421, 422 installed on each of these control channels 11, 12 with normally open contacts in each line of the indicated power supply circuits; a health check device for said power control circuits and software and hardware complex 60 that controls the operation of these electromagnetic control relays, based on the received commands and signals about the state of the controlled parameters of the object and control circuits, characterized in that the specified software and hardware complex 60 is additionally equipped with an element 63 for setting periodic switching of the power supply of the indicated channels 11, 12 with a predetermined frequency both in the open and in the closed position of the valve, and a block 64 for displaying current information about the results of checking the health of the corresponding circuit when every power switch; and the specified device for checking the health of power control circuits is made in the form of a separate for each of these channels 11, 12 electronic current indicator 71, 72 of a known type, connected in series in a controlled circuit.

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