Utility model content
The technical problems to be solved in the utility model is to provide a kind of boiler tube overtemperature alarm delay tripping system, and product quality in boiler tube has been reduced to impact, has promoted the process monitoring function of equipment.
In order to achieve the above object, the utility model provides a kind of boiler tube overtemperature alarm delay tripping system, comprising:
For measuring the thermocouple of the temperature of boiler tube;
For by described temperature and design temperature comparison, if surpassed described design temperature, export the thermometric control circuit of overtemperature signal;
For receiving the overtemperature signal of described thermometric control circuit output and starting timing, after finishing, timing sends the timing circuit of control signal; And
For control the tripping operation control circuit of temperature main switch trip protection according to described control signal;
Wherein said thermocouple, described thermometric control circuit, described timing circuit and described tripping operation control circuit are electrically connected to.
Wherein, described boiler tube overtemperature alarm delay tripping system, also comprises:
For receiving the overtemperature signal of described thermometric control circuit output, and the warning lock-in circuit of output alarm signal;
Be used for according to described alarm signal, and send the warning circuit of warning.
Wherein, described warning lock-in circuit is electrically connected to described warning circuit.
Wherein, described warning lock-in circuit has the reset key for the output of stop alarm signal.
Wherein, described thermocouple circuit comprises: the first thermocouple circuit, the second thermocouple circuit, three thermocouple circuit;
Wherein, described the first thermocouple circuit is arranged at the described boiler tube mouth of pipe;
Described the second thermocouple circuit is arranged in described boiler tube pipe;
Described three thermocouple circuit is arranged at described boiler tube pipe tail.
Wherein, described thermometric control circuit comprises: the first thermometric control circuit, the second thermometric control circuit, the 3rd thermometric control circuit, described the first thermometric control circuit is connected with described the first thermocouple circuit, described the second thermometric control circuit is connected with described the second thermocouple circuit, and described the 3rd thermometric control circuit is connected with described three thermocouple circuit.
Wherein, described timing circuit is connected with described the first thermometric control circuit, the second thermometric control circuit, the 3rd thermometric control circuit respectively, the overtemperature signal that described timing circuit receives the first thermometric control circuit, the second thermometric control circuit, the 3rd arbitrary road of thermometric control circuit starts timing, output control signal after timing completes.
Wherein, described warning lock-in circuit is connected with described the first thermometric control circuit, the second thermometric control circuit, the 3rd thermometric control circuit respectively, when described warning lock-in circuit receives the overtemperature signal on the first thermometric control circuit, the second thermometric control circuit, the 3rd arbitrary road of thermometric control circuit, output alarm signal.
The beneficial effect of such scheme of the present utility model is as follows:
Boiler tube overtemperature alarm delay tripping system of the present utility model, can get rid of the error tripping that error signal causes, and reduces product rejection rate, the process monitoring of lifting means, and validity and the stability of the overtemperture control of assurance supervisory circuit.
Embodiment
For making the technical problems to be solved in the utility model, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The problem that embodiment of the present utility model faces for BRUCE boiler tube production process, provides a kind of boiler tube overtemperature alarm delay tripping system.
As shown in Figure 1, the utility model embodiment provides a kind of boiler tube overtemperature alarm delay tripping system, comprising:
For measuring the thermocouple 1 of the temperature of boiler tube;
For by temperature and design temperature comparison, if surpassed design temperature, export the thermometric control circuit 2 of overtemperature signal;
For receiving the overtemperature signal of thermometric control circuit 2 outputs and starting timing, after finishing, timing sends the timing circuit 5 of control signal;
For control the tripping operation control circuit 6 of temperature main switch trip protection according to control signal;
Wherein thermocouple 1, thermometric control circuit 2, timing circuit 5 and tripping operation control circuit 6 are electrically connected to.
For receiving the overtemperature signal of thermometric control circuit 2 outputs, and the warning lock-in circuit 3 of output alarm signal;
For receiving the alarm signal of warning lock-in circuit 3 outputs, and sending the warning circuit 4 of warning, can be specifically sound light alarming circuit.
Wherein, warning lock-in circuit 3 is electrically connected to warning circuit 4.
Wherein, warning lock-in circuit 3 has the reset key for the output of stop alarm signal.
Wherein, thermocouple 1 circuit comprises: the first thermocouple circuit, the second thermocouple circuit, three thermocouple circuit;
Wherein, the first thermocouple circuit is arranged at the boiler tube mouth of pipe, measures the temperature of the boiler tube mouth of pipe;
The second thermocouple circuit is arranged in boiler tube pipe, measures the temperature in boiler tube pipe;
Three thermocouple circuit is arranged at boiler tube pipe tail, measures the temperature of boiler tube pipe tail.
Wherein, thermometric control circuit 2 comprises: the first thermometric control circuit, the second thermometric control circuit, the 3rd thermometric control circuit, the first thermometric control circuit is connected with the first thermocouple circuit, the second thermometric control circuit is connected with the second thermocouple circuit, and the 3rd thermometric control circuit is connected with three thermocouple circuit.
Wherein, timing circuit 5 is connected with the first thermometric control circuit, the second thermometric control circuit, the 3rd thermometric control circuit respectively, the overtemperature signal that timing circuit 5 receives the first thermometric control circuit, the second thermometric control circuit, the 3rd arbitrary road of thermometric control circuit starts timing, output control signal after timing completes.
Wherein, warning lock-in circuit 3 is connected with the first thermometric control circuit, the second thermometric control circuit, the 3rd thermometric control circuit respectively, when warning lock-in circuit 3 receives the overtemperature signal on the first thermometric control circuit, the second thermometric control circuit, the 3rd arbitrary road of thermometric control circuit, output alarm signal.
In the present embodiment, this supervisory circuit is comprised of six major parts: the thermocouple 1 of using for thermometric, measure respectively boiler tube mouth, in, the trizonal temperature of tail; Thermometric control circuit 2, for receiving thermocouple 1 signal and converting corresponding temperature value to and design temperature compares, as surpassed design temperature, outputs signal to warning lock-in circuit 3 and timing circuit 5; Warning lock-in circuit 3 receive after the overtemperature signal of any channel Temperature Measuring control circuit 2 can stable output alarm signal to warning circuit 4, even if the overtemperature signal interruption of thermometric control circuit 2, also not affecting the alarm signal output of warning lock-in circuit 3, could be removed warning until the reset key of warning lock-in circuit 3 inside is pressed during this time; The overtemperature signal that timing circuit 5 receives any channel Temperature Measuring control circuit 2 just starts timing, during as overtemperature signal interruption, timing zero clearing wait for that next overtemperature signal is to just reclocking, after timing completes, output signal is to tripping operation control circuit 6; Tripping operation control circuit 6 is controlled temperature main switch jumping electric protection after receiving signal.
As shown in Figure 2, No. three thermocouples measure respectively boiler tube mouth, in, tail three portion temperature, as long as there is a wherein road temperature, over design temperature, just send overtemperature signal, supervisory circuit detects overtemperature signal and will lock this signal and send warning, even overtemperature blackout (false alarm situation) now, report to the police and also can not stop, until artificially reset; Supervisory circuit is sent warning and is started timing (timing time can be set according to board situation in zero to several minutes) simultaneously, timing time is to controlling the tripping operation of heating main switch, if overtemperature blackout during timing (false alarm situation), timer zero clearing, wait for that next overtemperature signal triggers reclocking, the error tripping action that effectively eliminating error signal causes also reminds maintenance personal to process the reason of error signal generation in time, as situations such as thermocouple loose contact or fractures, guarantee validity and the stability of supervisory circuit overtemperture control.
The boiler tube overtemperature alarm delay tripping system of above-described embodiment, can get rid of the error tripping that error signal causes, and reduces product rejection rate, the process monitoring of lifting means, and validity and the stability of the overtemperture control of assurance supervisory circuit.
The above is preferred implementation of the present utility model; should be understood that; for those skilled in the art; do not departing under the prerequisite of principle described in the utility model; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.