CN2302476Y

CN2302476Y - Temperature induction boiler limiting water level automatic alarming protector

Info

Publication number: CN2302476Y
Application number: CN 97208758
Authority: CN
Inventors: 廖迪煜
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-04
Filing date: 1997-03-04
Publication date: 1998-12-30
Anticipated expiration: 2007-03-04

Abstract

The utility model relates to a boiler protector, particularly an automatic alarming protector for the limiting water level of a boiler of a temperature induction type, which is formed in a way that a temperature sensor 1 is connected with a controller 3 by a thermostat. The utility model has the structural characteristics that the thermostat is connected with a drive circuit 9 by an amplification circuit 5 and a comparative adjustment circuit 6; the output end of the amplifying circuit 5 is also connected with a temperature display circuit 7; the other input end of the comparative adjustment circuit 6 is connected with a temperature setting circuit 8; the input end of a bridge circuit 4 is connected with the temperature sensor; the output end of the drive circuit 9 is connected with the input end of the controller 3. The utility model can control the water level of the boiler according to detected temperature of the boiler with not influences of the water quality and the scale. The utility model has the advantages of high reliability, simple structure, less mechanical parts and convenient installation, usage and maintenance, and is widely used in various industrial boilers.

Description

Temperature induction type boiler limiting water level automatic alarm protecting

The utility model relates to a kind of boiler protection device, particularly a kind of temperature induction type boiler limiting water level automatic alarm protecting.Belong to boiler liquid level and temperature automation field in volume in the physical field, flow, temperature or the level gauging scope.

The boiler water level controller of prior art mainly contains three kinds of float-ball type, electric pole type and condenser types etc., though these several technology are preventing to receive certain effect aspect the bursting of boilers, but there is following shortcoming in they: 1. ball float is easy to generate crackle for a long time under high temperature, high pressure, makes control fails; 2. it is higher that electric pole type and condenser type require water quality, is subjected to water quality impact very big, if water quality is relatively poor, produces incrustation scale more for a long time in the boiler, and control can be malfunctioning; 3. it is bigger influenced by artifical water height, in case artifical water height occurs, controls promptly malfunctioning; 4. can not monitor the temperature of boiler and the temperature of heating surface water side, be unfavorable for monitoring and timely processing accident.

The purpose of this utility model is in order to overcome the shortcoming of prior art, a kind of temperature induction type boiler limiting water level automatic alarm protecting that can detect and show boiler temperature and can control the boiler limiting water level to be provided.

The purpose of this utility model can reach by taking following measure: temperature induction type boiler limiting water level automatic alarm protecting; connecting controller 3 by temperature sensor 1 by temperature regulator forms; its design feature is: temperature regulator passes through amplifying circuit 5 by bridge circuit 4; relatively regulating circuit 6 connects driving circuit 9; the output terminal of amplifying circuit 5 also connects temperature display circuit 7; relatively another input end of regulating circuit 6 connects temperature setting circuit 8; the input end of bridge circuit 4 connects temperature sensor 1, and the output terminal of driving circuit 9 connects the input end of controller 3.

Design feature of the present utility model also has:

Bridge circuit 4 is by inductance L, resistance R and capacitor C are formed by connecting, amplifying circuit 5 is by relatively amplifying chip IC 1 and peripheral resistance is formed by connecting, relatively regulating circuit 6 is by relatively amplifying chip IC 2 and peripheral resistance is formed by connecting, temperature setting circuit 7 is formed by connecting by adjustable potentiometer that is connected with direct supply and divider resistance R, the two ends of this divider resistance R connect the center tap of adjustable potentiometer respectively and relatively amplify an input end of chip IC 2, temperature display circuit 8 connects the output terminal that amplifies chip IC 1 by thermometer M by current-limiting resistance R and forms, driving circuit 9 is formed by connecting by triode BG2 and peripheral resistance thereof, the input end of IC1 connects bridge circuit 4 by resistance R 11, its another input end connects output terminal by resistance R 12, the output terminal of IC1 also connects the input end of IC2 and is connected thermometer M by resistance R 20 with resistance R 21 by resistance R 18, and the base stage of triode BG2 connects the output terminal of IC2 by resistance R 16, collector connects the input end of controller 3 by relay J 0.

Temperature sensor 1 is made of thermopair 10 and Sealed casing pipe 11, and thermopair 10 is sealed in the inner chamber of sleeve pipe 11 and connects bridge circuit 4 by compensating wire 2, and Sealed casing pipe 11 fixedly is welded in the highest smoke exhaust pipe outside surface of boiler.

Controller 3 is by relay J 1, J2, J3, SJ, electric bell DL and pushbutton switch TA, QA is formed by connecting, the normally closed contact J11 of J1 wherein, the normally opened contact J22 of J2 series connection also is serially connected with in the power supply of starting or stopping control circuit of boiler, the start and stop control phase line of power of boiler is passed through J1, the normally opened contact SJ1 of SJ connects the normally opened contact J02 of temperature regulator repeat circuit J0, and pass through J1, the normally opened contact J32 of relay J 3 connects the output terminal of driving circuit 9 in the temperature regulator, electric bell DL is connected across the two ends of J1, the power supply of starting or stopping control circuit is by pushbutton switch TA, QA connects the power end of temperature regulator, the normally opened contact J12 of J1, connect with the coil of J3 after the normally opened contact J31 parallel connection of J3 and be connected across between the zero line of the tie point of TA and QT and power supply, the normally opened contact J21 of J2 is connected across the two ends of QA, time relay sj is in parallel with relay J 2, and its two ends connect the zero line of power supply respectively, between the power lead of pushbutton switch QA and temperature regulator.

Compared with prior art, the utlity model has following outstanding advantage:

1. according to the temperature of detected boiler, the water level of control boiler is not subjected to the influence of water quality, incrustation scale, security and reliability height.

2. simple in structure, mechanical part is few, installation, use, easy to maintenance.

3. with low cost, its cost not as good as float-ball type 1/8th, the sixth of electric pole type.

4. urgent blowing out switch is set,, but presses this switch just blowing out and releasing warning if find emergency condition.

Below in conjunction with accompanying drawing the utility model being carried out detail describes:

Fig. 1 is a structured flowchart of the present utility model.

Fig. 2 is the electrical schematic diagram of the temperature regulator of the utility model embodiment 1.

Fig. 3 is the structure cut-away view of the temperature sensor of the utility model embodiment 1.

Fig. 4 is the electrical schematic diagram of the controller of the utility model embodiment 1.

Fig. 1, Fig. 2, Fig. 3, Fig. 4 constitute embodiment 1 of the present utility model.From above-mentioned diagram as can be known, present embodiment is by temperature sensor 1, temperature regulator and controller 3 are formed, temperature sensor 1 is made of thermopair 10 and Sealed casing pipe 11, thermopair 10 is sealed in the inner chamber of sleeve pipe 11 and fully contacts with sleeve pipe 11, Sealed casing pipe 11 fixedly is welded on the highest smoke exhaust pipe of boiler, temperature regulator is by transformer T, diode D1～D6, resistance R 1～R24, capacitor C 1～C7, triode BG1～BG, 2 stabilivolt ZD1～ZD4, light emitting diode LD1～LD2, relay J 0, relatively amplify chip IC 1～IC2, inductance L, thermometer M and junction block 30 are formed by connecting, bridge circuit 4 is by inductance L, resistance R 6, R7, R24 and capacitor C 5 are formed by connecting, amplifying circuit 5 is by relatively amplifying chip IC 1 and peripheral resistance R 10 thereof, R12 is formed by connecting, relatively regulating circuit 6 is by relatively amplifying chip IC 2 and peripheral resistance R 19 thereof, R22 is formed by connecting, temperature setting circuit 7 is formed by connecting by adjustable resistance R15 that is connected with direct supply and divider resistance R17, the two ends of this divider resistance connect the center tap of adjustable resistance respectively and relatively amplify the positive input terminal of chip IC 2, temperature display circuit 8 passes through current-limiting resistance R20 by thermometer M, R21 connects the output terminal that amplifies chip IC 1 and forms, driving circuit 9 is by triode BG2 and peripheral resistance R 16 thereof, capacitor C 8 is formed by connecting, the positive input terminal of IC1 is by resistance R 11, R13 connects bridge circuit 4, its output terminal connects negative input end by resistance R 12 and connects the negative input end of IC2 by resistance R 18, the base stage of triode BG2 is by resistance R 16, R19 connects the output terminal of IC2, collector connects the terminal 9 of junction block 30 and passes through light emitting diode LD1, relay J 0 connects the collector of triode BG1, the base stage of triode BG1 is by voltage stabilizing diode ZD1, light emitting diode LD2, resistance R 19 connects the output terminal of IC2, commutation diode D1～D4, capacitor C 1 connects into bridge rectifier filter circuit, terminal 8 terminals of junction block 30, terminal 10 respectively with the normally closed contact J01 of relay J 0, normally opened contact J02 connects, the terminal 6 of junction block 30, terminal 7 connects AC power, the terminal 2 of junction block 30, terminal 3 connects the output terminal of thermopair 10, controller 3 is by relay J 1, J2, J3, SJ, electric bell DL and pushbutton switch TA, QA is formed by connecting, the normally closed contact J11 of J1 wherein, the normally opened contact J22 of J2 series connection also is serially connected with in the power supply of starting or stopping control circuit of boiler, the phase line of power of the starting or stopping control circuit of boiler connects the terminal 6 of junction block 30 and passes through J1, the normally opened contact SJ1 of SJ connects the terminal 10 of junction block 30 and passes through J1, the normally opened contact J32 of relay J 3 connects the terminal 9 of junction block 30, electric bell DL is connected across the two ends of J1, the power supply of starting or stopping control circuit is by pushbutton switch TA, QA connects the terminal 6 of junction block 30, the normally opened contact J12 of J1, connect with the coil of J3 after the normally opened contact J31 parallel connection of J3 and be connected across between the zero line of the tie point of TA and QT and power supply, the normally opened contact J21 of J2 is connected across the two ends of QA, time relay sj is in parallel with relay J 2, and its two ends connect the zero line of power supply respectively, between the power lead of pushbutton switch QA and temperature regulator 2.

From Fig. 2 Fig. 4 as can be known, when boiler not during lack of water, press reset switch QA, relay J 2, J21, the J22 closure, thermopair 10 detected temperature signals are sent into that IC1 amplifies and are sent into the input end of comparison regulating circuit 6 and deliver to thermometer M through the output terminal of IC1 through bridge circuit 4 and show the temperature of being surveyed, IC2 compares signal and the temperature setting signal that IC1 sends here, when thermopair 10 detected boiler temperatures during less than design temperature, the base stage of triode BG2 can not get drive signal, and BG2 is in cut-off state, its collector current is zero, this moment, light emitting diode LD1 was bright, and LD2 goes out, the terminal 8 and terminal 9 short circuits of junction block 30, and terminal 10 and terminal 9 open circuits, relay J 1 can not get electric attonity, because J11 is a normally closed contact, boiler master returns middle energising, and boiler is kept normal operating condition; When thermopair 10 detected boiler temperatures were equal to or greater than design temperature, BG2 was in state of saturation, relay J 0 action this moment, LD1 goes out, and LD2 is bright, and the terminal 9 of junction block 30 is terminal 10 and terminal 9 short circuits with terminal 8 open circuits, relay J 1 electric adhesive, J11 move disconnection, the power supply of cut-out main control loop, make the main and auxiliary machine of boiler all out of service automatically, while J12 closure, relay J 3 gets electric, the J31 self-locking, the J32 closure, electric bell DL pronounces to report to the police.

If meet accident, when needing urgent blowing out, press switch TA in the boiler running process, relay J 2 outages, J21 cuts off the power supply of temperature regulator, and J22 cuts off the power supply in boiler master loop, and the main and auxiliary machine of boiler is all out of service.

Claims

1. temperature induction type boiler limiting water level automatic alarm protecting; connecting controller (3) by temperature sensor (1) by temperature regulator forms; it is characterized in that: temperature regulator passes through amplifying circuit (5) by bridge circuit (4); relatively regulating circuit (6) connects driving circuit (9); the output terminal of amplifying circuit (5) also connects temperature display circuit (7); relatively another input end of regulating circuit (6) connects temperature setting circuit (8); the input end of bridge circuit (4) connects temperature sensor (1), and the output terminal of driving circuit (9) connects the input end of controller (3).

2. temperature induction type boiler limiting water level automatic alarm protecting according to claim 1; it is characterized in that: bridge circuit (4) is by inductance L; resistance R and capacitor C are formed by connecting; amplifying circuit (5) is by relatively amplifying chip IC 1 and peripheral resistance is formed by connecting; relatively regulating circuit (6) is by relatively amplifying chip IC 2 and peripheral resistance is formed by connecting; temperature setting circuit (7) is formed by connecting by adjustable potentiometer that is connected with direct supply and divider resistance R; the two ends of this divider resistance R connect the center tap of adjustable potentiometer respectively and relatively amplify an input end of chip IC 2; temperature display circuit (8) connects the output terminal that amplifies chip IC 1 by thermometer M by current-limiting resistance R and forms; driving circuit (9) is formed by connecting by triode BG2 and peripheral resistance thereof; the input end of IC1 connects bridge circuit (4) by resistance R 11; its another input end connects output terminal by resistance R 12; the output terminal of IC1 also connects the input end of IC2 and is connected thermometer M by resistance R 20 with resistance R 21 by resistance R 18, and the base stage of triode BG2 connects the output terminal of IC2 by resistance R 16; collector connects the input end of controller 3 by relay J 0.

3. temperature induction type boiler limiting water level automatic alarm protecting according to claim 1 and 2; it is characterized in that: temperature sensor (1) is made of thermopair (10) and Sealed casing pipe (11); thermopair (10) is sealed in the inner chamber of sleeve pipe (11) and connects bridge circuit (4) by compensating wire (2), and Sealed casing pipe (11) fixedly is welded in the highest smoke exhaust pipe outside surface of boiler.

4. temperature induction type boiler limiting water level automatic alarm protecting according to claim 1 and 2; it is characterized in that: controller (3) is by relay J 1; J2; J3; SJ; electric bell DL and pushbutton switch TA; QA is formed by connecting; the normally closed contact J11 of J1 wherein; the normally opened contact J22 of J2 series connection also is serially connected with in the power supply of starting or stopping control circuit of boiler; the start and stop control phase line of power of boiler is passed through J1; the normally opened contact SJ1 of SJ connects the normally opened contact J02 of temperature regulator repeat circuit J0; and pass through J1; the normally opened contact J32 of relay J 3 connects the output terminal of driving circuit 9 in the temperature regulator; electric bell DL is connected across the two ends of J1; the power supply of starting or stopping control circuit is by pushbutton switch TA; QA connects the power end of temperature regulator; the normally opened contact J12 of J1; connect with the coil of J3 after the normally opened contact J31 parallel connection of J3 and be connected across between the zero line of the tie point of TA and QT and power supply; the normally opened contact J21 of J2 is connected across the two ends of QA; time relay sj is in parallel with relay J 2, and its two ends connect the zero line of power supply respectively; between the power lead of pushbutton switch QA and temperature regulator.