PL156190B1 - Control circuit for controlling liquid level in steam generators - Google Patents

Abstract

System for regulating the liquid level in the generator steam, which controls, by means of relays, a pump which replenishes the amount of liquid in the tank and a switch of heaters for heating liquids, characterized by that it is an integrated element, cooperating with conductometric ones probes (Si, S2, S3) such that longer probe (Si) located in the main tank (1) representing a resistor (R0 is the resistive divider connected to the contact (2P2) of the relay (P2) and the capacitor (Ci) and with the input of the NO-OR (5) element of which the output through a resistor (R2) is connected to the capacitor (C2) and the base of the transistor (Ti) of which the collector is connected to a diode (Di) and to the relay coil (Pi), while also placed in the main in the tank (1), the shorter probe (S2) is connected to the resistor (R3) and anti-interference capacitor (C3) and through the contacts (2Pi) of the relay (Pi) with the input element NOT-OR (6), the output of which is through a resistor (R4) is connected to a capacitor (C4) and to the base transistor (T2), the collector of which through the resistor (Rs) is connected to the signaling diode (D2), further replaced the shorter probe (S2) is connected via contacts (2P2) of the relay (P2) with input NO-OR (7), the output of which is connected via a resistor (Re) to capacitor (C5) and the first input of the element NO-OR (8) whose second input is connected through a resistor (R7) with power supply, a capacitor (Ce) and an additional probe (S3) placed in the additional tank (2), with the output of the element NOR (8) via resistor (Re)

Description

REPUBLIC POLAND © PATENT DESCRIPTION © PL © 156190 © BI Report number: 270493 © IntCl ^5: patent Office (°) Filing date: ⁰ 4 · ⁰² .1 ⁹ 88 F22B 35/00 G05D 27/02 Polish Republic eznEiuii O fi N1 f.i &

A system for regulating the liquid level in the steam generator

Application announced:

August 7, 1989 BUP 16/89

The holder of the patent:

Central Research and Development Center for Textile Machines "Polmatex-Cenaro, Łódź, PL

Inventors:

Adam Hofbauer, Lodz, PL Jan Bomanowski, Lodz, PL

The grant of the patent was announced on: February 28, 1992, WUP 02/92

PL 156 190 BI

A system for regulating the liquid level in the steam generator, which controls the pump by means of relays

57) replenishing the amount of liquid in the tank and the contact coil of the heaters for heating the liquid, characterized by the fact that it is an integrated element, cooperating with conductometric probes (Si, S2, S3) in such a way that placed in the main tank (1) longer a probe (Si) with a resistor (R0, a resistive divider) is connected to the contact (2P2) of the relay (P2) and the capacitor (Ci) and to the input of the NO-OR element (5), the output of which through the resistor (R2) is connected to the capacitor ( C2) and the base of the transistor (Ti), the collector of which is connected to the diode (Di) and the relay coil (Pi), while the shorter probe (S2) also located in the main tank (1) is connected to the resistor (R3) and an anti-interference capacitor (C3) and through the contacts (2Pi) of the relay (Pi) with the input of the NO-OR (6) element, the output of which through the resistor (R4) is connected to the capacitor (C4) and to the base of the transistor (T2), the collector of which through the resistor ( Rs) is connected to the signaling by a diode (D2), moreover, said shorter probe (S2) is connected via the contacts (2P2) of the relay (P2) with the input of the NO-OR (7) element, the output of which through the resistor (Re) is connected to the capacitor (C5) and the first input of the NO-OR (8) element, the second input of which is connected through a resistor (R7) with the power supply to the system, a capacitor (Ce) and an additional probe (S3) located in an additional tank (2), the output of the NIELUB element (8) via resistor (Re) ¹ -

SYSTEM FOR REGULATING THE LIQUID LEVEL IN THE STEAM GENERATOR

Claims (1)

Patent claim A system for regulating the liquid level with steam control, which controls by means of a relay, which supplements the amount of liquid in the tank, and the contactor of the heaters dt for liquid heating, characterized by the fact that there is an integrated element, cooperating with ktnduktmetrycznyrai scndami / Sp Sg, S ^ / o such sptsób that umieszcztna of główiym zbitrniku / l / longer Stnd / sj / stanooiąca the resistor / R / resistive divider is połącztna the pin ^{/ 2pg} / ^p o ^k a ^from ni.ka ^{/ PG} / i ktndensattrem / ^J., / traz of the arrival of the NOT-IUB / 5 / message, which is connected to the ktndensatter / C £ / and the transistor base / T- /, which collector is connected to the digital / D ^ / and the relay switch / P ^ / , n ^ ttm ^ st placed also with the main collector / 1 / shorter stnda / Sg / is connected with the resistor / R- / and the interfacing ktndensator / c ^ / also pt through the contact / 2Pj / relay / Pj / with the arrival of the NIE-IUB element / 6 /, which path is through the resistor / R ^ / is the link with ktedeesatiΓem / c ^ / ® together with the base of the transistor / Tg /, which collector through the resistor / r ^ / is connected with the signaling ditda / Dgl, and then the variable shorter stnda / Sg / is connected through the contacts l2p ^ j of the relay / Pg / with ^^. The output of the element NIE-IUB / 7 /, which is connected to the ktndeesator / C ^ / and the pedestrian ^^^ of the NI2-LUB / 8 / element, which second pass is connected by the resistor / r? / To the power supply of the system with the sensor / Cg / and dtdata, the standard / s ^ / placed at dtda-ttoAy ^ m of the biireiku / 2 /, where the output of the NOT-OR element / 8 / through the resistor / R _g / is connected to the base of the transistor / Tj / which collector it is connected to the relay's ceoka / Pg /, ditda / D3 / traz ktedensatora / c? /. * * * The subject of the oymlazek is a system for controlling the level of liquid with a steam coefficient, designed to maintain the fat level of a liquid with a concentrated tank, and also to control the liquid level of a condenser, as well as for controlling the heaters. The system may have to adjust the level of highly foaming liquids. The control system from ^; o> irn. steam regulates the power supply oode wJrt; o ^ inióy, oipotent with electric heaters and a power supply unit, and then controls the heating of o> dy. This system is equipped with an automatic liquid flow regulator, a sink at the bottom of the pimiartoe, a submerged tank with a deepened container, a temperature regulator and a contactor connecting the heaters. The cutomtic liquid level regulator controls the relays cooperating with the two components and the contactor together with the power supply. The entire system is powered by a gas switch, while the temperature controller and the automatic liquid level controller are supplied directly from the mains. The system for regulating the liquid level is the oynlase lye and is an integral element that will work with three linear inductometric standards, the bottom of which are immersed in a deepened condenser and a statement about a decanter. The longer one, with a plug-in condenser, and the divider placed with the resistor, is connected with the relay contact that controls the operation of the PTMP, supplementing the liquid with the main container. This Ptnadtt stnda is connected with ktndensattrei przedwzakłCiento ^ y <and also with the arrival of the NOT-OR element, constituting the ptds ^^^^ t ^ oy the element of the control tbotdu with heaters, immersed z ^Γm ί ^e eiinyi. The output of the NO-OR element through a second resistor is connected to the second capacitor and to the base of the transistor, the collector of which is connected to the diode, and to the relay coil which turns the heaters on. The shorter probe, also placed in the main tank, is connected via a third resistor and a third capacitor and a second relay contact with the input of the second NO-OR element, which is the main element of the signaling circuit. The output of this element through the fourth resistor is connected to the fourth capacitor and to the base of the second transistor, the collector of which through the fifth resistor is connected to the signaling diode. The shorter probe is also connected through the contacts of the relay controlling the operation of the pump, with the input of the third NO-OR element, which, in fact, through the sixth resistor is connected to the fifth capacitor and one of the inputs of the fourth NO-OR element, the second input of which is connected through the seventh resistor with the power supply system, and with a sixth condenser and a third additional probe immersed in the auxiliary tank. The output of the fourth NEE-LUB element through the eighth resistor is connected to the base of the third transistor, the collector of which is connected to the coil of the relay controlling the operation of the pump, and to the second diode and the seventh capacitor. The third and fourth NO OR elements are the basic elements of the pump control circuit to replenish the amount of liquid in the main tank. The system according to Miazek ensures optimal control of the liquid level in the tank. The solution according to the invention is presented in the example of the drawing in the form of a schematic diagram. The circuit based on the MCY74OO1N integrated element, made in the C-MOS technology, works with three conductometric probes S ^, S ₂ , S ^. The longer probe and the shorter probe S ₂ are placed in the main tank 1 of the steam generator, while the additional probe is placed in the additional tank 2. The system consists of three circuits: circuit 1 for controlling the electromagnetic pump 3, circuit II for controlling heaters 4 and signaling circuit III. The circuit I for controlling the electromagnetic pump 3 works with both the longer probe S- and the additional probe S ^. The heater control circuit II works with the longer probe S ^, which determines the minimum water level in the main tank 1, while the signaling circuit III works with the shorter probe S2, which determines the maximum water level in the main tank 1. The longer probe S-, which is the resistance ^ m R ^ resistive divider is connected to the open contact 2P2 of the relay P2 and the capacitor and to the input of the NO-OR 5 element, the output of which through the resistor Rg is connected to the capacitor C2 and to the base of the transistor T ^, the collector of which is connected to the diode Dj and 2 with the coil of the P ^ relay controlling the heaters 4. The shorter S2 probe, also immersed in the main tank 1, is connected to the resistor R ^ and the anti-interference capacitor Cj and through the contact 2P ^ of the P ^ relay with the input of the NO-OR 6 element, which is probably through the resistor R ^ is connected to the capacitor C ^ and the base of transistor T2, the collector of which through the resistor R ^ is connected to the signaling diode D2. The probe S2 is also connected via the 2P2 contacts of the P2 relay to the input of the NO-OR element 7. 'The output of the NO-OR element 7 through the resistor Rg is connected to the capacitor C _g and the first input of the NO-OR element 8. Second input of the NO-OR element 8 through the resistor R? it is connected to the power supply of the system and to the capacitor Cg and an additional probe S ^. The removal of this element through the resistor Rg is connected to the base of the transistor T ^, the collector of which is connected to the relay coil Pg, the diode D ^, and the capacitor C ^. Other inputs of NO-OR elements are connected to ground. The system works as follows: in the flagellum situation, the main tank 1 and the additional tank 2 are empty - probes S ^, S2 are not submerged - this corresponds to the logical state 1. At the input of the NO-OR 8 element connected with the probe, the logic state 1 is set, and at the input of this element the logic state is 0, which causes the conduction of the transistor T ^ and excitation of the P ₂ relay. The passive IP2 contact of the P2 relay is open - pump 3 is off. After filling the additional tank 2 with liquid, the probe S- is immersed, which corresponds to the logical state 0. In this case, the logical state at the output of the NO-OR 8 element depends on the level visible in the main tank 1. When the water level in this tank is below probe S2 at the input of the element NO-OR 7 j ^es t steady logical state 1, - but 156 190 on the value of the NO-OR 7 element, the logical state 0 is set, which causes the signal change at the input of the NO-OR 8 element from the logic level 0 to 1. The transistor is not conducting, the Pg relay is turned on, the LPg contact is closed - complementary water pump 3 is turned on. If the water in the main tank 1 reaches the Sg probe level, the signal at the input of the NO-OR 7 element will change from the logical level 1 to 0. At the input of the NO-OR element 7, the logic level 1 will be set, which causes a change of the signal at the input of the NO-OR element 8 from 1 ”to 0. The transistor T ^ is on, the relay Pg is energized, the contact LPg is closed, turning off the pump 3, until the water level in the tank 1 drops below the probe S.,. The 2P £ contact is switched to probe Sg. When the probe is ^nur zone change logic level wjściu NOR element 7 from 0 to 1, causing activation of the relay and pump on Pg 3. Furthermore, on input of NOR gate 5 establishes a logic 0 level, so the transistor T ^ not leads. The P · ^ relay is on, the 1P ^ contact is open - the heaters are on. After immersing the probe in water, the logic level 1 is set at the input of the NO-OR 5 element - the transistor T ^ is conducting, the relay P ^ is energized, the contact 1P ^ is closed - the heaters are turned on. The input of the NO-OR 6 element is wound to the msy. The logic level 1 is set at the Input of this element. The transistor Tg is not conducting, the diode Dg is off. When the water level is the area ^that the probe j ^ P relay is activated and the input of NOR gate 6 is connected to the probe Sg. If the probe is in ^{a dive} zone on wjściu element NO-IUB 6 shall be a logic 0 level and the transistor Tg conductive causing diode Dg. After immersing the probe Sg at the input of the NIE-IUB 6 element, the logic level 1 is set, the transistor Tg is not conducting, the diode Dg is off. The Dg diode is on when the water level in the main tank 1 is between the levels of the probes and Sg.