CN210400652U - Electromagnetic valve state monitoring device based on temperature acquisition - Google Patents
Electromagnetic valve state monitoring device based on temperature acquisition Download PDFInfo
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- CN210400652U CN210400652U CN201921923215.5U CN201921923215U CN210400652U CN 210400652 U CN210400652 U CN 210400652U CN 201921923215 U CN201921923215 U CN 201921923215U CN 210400652 U CN210400652 U CN 210400652U
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Abstract
Solenoid valve state monitoring devices based on temperature acquisition belongs to solenoid valve state monitoring technology field. The utility model provides a current unable problem of monitoring is carried out to the state of AST solenoid valve. The utility model discloses a surface mount type temperature sensor is mounted on the AST electromagnetic valve for collecting the temperature of the electromagnetic valve; and sending the collected temperature to an alarm circuit; the alarm circuit is used for comparing the received temperature signal with a reference temperature and giving an alarm when the received temperature is greater than the reference temperature; the additional power supply is used for supplying power to the patch type temperature sensor and the alarm circuit. The utility model is used for detect the solenoid valve state.
Description
Technical Field
The utility model belongs to the technical field of solenoid valve state monitoring.
Background
The AST electromagnetic valve is used as a key protection execution element of the steam turbine set, and has a vital significance for the safe operation of a steam turbine. The AST electromagnetic valve belongs to a device which runs in a long-term live mode, high-temperature damage is easy to occur, tripping of a running unit can be caused if the electromagnetic valve is burnt out, unplanned shutdown is caused, and huge loss is brought to a power plant, a power grid and even a power utilization user.
The operating temperature of solenoid valve is an important parameter that can judge solenoid valve operating condition, but does not have a device that can gather solenoid valve operating temperature and judge the solenoid valve state at present, so the operating personnel of power plant just can't know the operating condition of solenoid valve in real time, can not timely change when the AST solenoid valve takes place unusually.
SUMMERY OF THE UTILITY MODEL
The utility model relates to a solve the current unable problem of monitoring is carried out to the state of AST solenoid valve, provided a solenoid valve state monitoring devices based on temperature acquisition.
The utility model discloses a solenoid valve state monitoring device based on temperature acquisition, including SMD temperature sensor 3, warning circuit 2 and auxiliary power supply 1;
the patch type temperature sensor 3 is attached to the AST electromagnetic valve and used for collecting the temperature of the electromagnetic valve; and sends the collected temperature to the alarm circuit 2;
the alarm circuit 2 is used for comparing the received temperature signal with a reference temperature and giving an alarm when the received temperature is greater than the reference temperature;
the auxiliary power supply 1 is used for supplying power to the patch type temperature sensor 3 and the alarm circuit 2.
Further, the alarm circuit 2 comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a thermoelectric patch Pt1, a rheostat Ra, a comparator TA, a diode D1 and a buzzer B1;
one end of the resistor R1 is connected with one end of the resistor R2, and the other end of the resistor R2 is connected with the non-inverting signal input end of the comparator TA;
the non-inverting signal input end of the comparator TA is also connected with one end of a rheostat Ra, and the other end of the rheostat Ra is connected with the negative electrode of the auxiliary power supply;
the other end of the resistor R1 is connected with the reverse signal input end of the comparator TA; one end of the thermoelectric patch Pt1 is connected with the reverse signal input end of the comparator TA; the other end of the electric patch Pt1 is connected with the negative electrode of the auxiliary power supply;
one end of the resistor R3 is connected with one end of the resistor R1, the other end of the resistor R3 is connected with a positive power supply end of the comparator TA, and the positive power supply end of the comparator TA is also connected with the positive electrode of the auxiliary power supply;
one end of a buzzer B1 is connected with the positive electrode of the auxiliary power supply, the other end of a buzzer B1 is connected with one end of an AST electromagnetic valve coil, the other end of the AST electromagnetic valve coil is connected with the positive electrode of a diode D1, the negative electrode of the diode D1 is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with the output end of a comparator TA;
and the negative power end of the comparator TA is connected with the negative electrode of the auxiliary power supply.
The utility model discloses realize the state monitoring devices of AST solenoid valve based on temperature acquisition, the device can real-time supervision AST solenoid valve's operating temperature, and the operating condition of solenoid valve just can be judged according to the operating temperature of solenoid valve to the technical staff of this power plant. When the temperature of the solenoid valve deviates from the normal operating range, it indicates that the solenoid valve has failed. After the device is adopted for detection, technicians in a power plant receive an alarm and check the working temperature of the AST electromagnetic valve in time to judge whether the electromagnetic valve has a fault or not, and replace the electromagnetic valve in time to avoid abnormal shutdown of a steam turbine set.
Drawings
Fig. 1 is a schematic structural diagram of the electromagnetic valve state monitoring device based on temperature acquisition according to the present invention;
fig. 2 is a schematic diagram of the circuit configuration of the alarm circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
The first embodiment is as follows: the following describes the present embodiment with reference to fig. 1 and fig. 2, and the electromagnetic valve state monitoring device based on temperature acquisition in the present embodiment includes a patch type temperature sensor 3, an alarm circuit 2 and an auxiliary power supply 1;
the patch type temperature sensor 3 is attached to the AST electromagnetic valve and used for collecting the temperature of the electromagnetic valve; and sends the collected temperature to the alarm circuit 2;
the alarm circuit 2 is used for comparing the received temperature signal with a reference temperature and giving an alarm when the received temperature is greater than the reference temperature;
the auxiliary power supply 1 is used for supplying power to the patch type temperature sensor 3 and the alarm circuit 2.
Further, the alarm circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a thermoelectric patch Pt1, a rheostat Ra, a comparator TA, a diode D1 and a buzzer B1;
one end of the resistor R1 is connected with one end of the resistor R2, and the other end of the resistor R2 is connected with the non-inverting signal input end of the comparator TA;
the non-inverting signal input end of the comparator TA is also connected with one end of a rheostat Ra, and the other end of the rheostat Ra is connected with the negative electrode of the auxiliary power supply;
the other end of the resistor R1 is connected with the reverse signal input end of the comparator TA; one end of the thermoelectric patch Pt1 is connected with the reverse signal input end of the comparator TA; the other end of the electric patch Pt1 is connected with the negative electrode of the auxiliary power supply;
one end of the resistor R3 is connected with one end of the resistor R1, the other end of the resistor R3 is connected with the positive power end of the comparator TA,
the positive power supply end of the comparator TA is also connected with the positive electrode of the auxiliary power supply;
one end of a buzzer B1 is connected with the positive electrode of the auxiliary power supply, the other end of a buzzer B1 is connected with one end of an AST electromagnetic valve coil, the other end of the AST electromagnetic valve coil is connected with the positive electrode of a diode D1, the negative electrode of the diode D1 is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with the output end of a comparator TA;
and the negative power end of the comparator TA is connected with the negative electrode of the auxiliary power supply.
Further, the resistances of the resistor R1 and the resistor R2 are 10k Ω.
Further, the comparator TA has a model number TAA 2761.
Further, the thermoelectric patch Pt1 is a model Pt 100.
Further, the resistance value of the resistor R3 is 1k Ω.
When the electromagnetic valve is used, the resistance value of the rheostat Ra needs to be set to be the resistance value corresponding to the highest temperature allowed when the electromagnetic valve works normally, and when the working temperature of the electromagnetic valve rises, the resistance value of the thermoelectric patch Pt1 rises. Once the temperature of the solenoid valve exceeds the normal operating temperature, the resistance value of the thermoelectric patch Pt1 exceeds the preset resistance value of the varistor Ra, the voltage input at the reverse input end of the comparator 1 is higher than the voltage input at the forward input end, the output voltage of the comparator is 0, and the diode D1 is turned on. Meanwhile, the buzzer B1 gives an alarm, the coil of the relay KM is electrified, the normally open contact K1 is closed, (the temperature alarm is electrified to send a temperature alarm signal, and meanwhile, the switching value is sent to a detection device in the centralized control room to remind an operator of abnormal temperature of the electromagnetic valve.
The utility model discloses a thermal resistance paster measures the operating condition who obtains the solenoid valve coil, can accomplish in time to show solenoid valve operating temperature. If the temperature abnormity operation personnel can timely know and process, the unplanned shutdown of the unit caused by the high-temperature damage of the electromagnetic valve can be avoided. The system has the advantages of small investment, convenient installation and simple use, and can accurately judge the working state of the electromagnetic valve without the need of relevant learning of operators. At present, no relevant solenoid valve diagnosis technology exists, the pre-diagnosis work fills up the blank in the technical aspect of solenoid valve diagnosis, and the probability of tripping of the steam turbine caused by burning of the solenoid valve can be greatly reduced.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (6)
1. The electromagnetic valve state monitoring device based on temperature acquisition is characterized by comprising a surface-mounted temperature sensor (3), an alarm circuit (2) and an auxiliary power supply (1);
the patch type temperature sensor (3) is attached to the AST electromagnetic valve and used for collecting the temperature of the electromagnetic valve; and sends the collected temperature to an alarm circuit (2);
the alarm circuit (2) is used for comparing the received temperature signal with a reference temperature and giving an alarm when the received temperature is higher than the reference temperature;
the auxiliary power supply (1) is used for supplying power to the patch type temperature sensor (3) and the alarm circuit (2).
2. The temperature acquisition-based state monitoring device for the electromagnetic valve according to claim 1, characterized in that the alarm circuit (2) comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a thermoelectric patch Pt1, a rheostat Ra, a comparator TA, a diode D1 and a buzzer B1;
one end of the resistor R1 is connected with one end of the resistor R2, and the other end of the resistor R2 is connected with the non-inverting signal input end of the comparator TA;
the non-inverting signal input end of the comparator TA is also connected with one end of a rheostat Ra, and the other end of the rheostat Ra is connected with the negative electrode of the auxiliary power supply;
the other end of the resistor R1 is connected with the reverse signal input end of the comparator TA; one end of the thermoelectric patch Pt1 is connected with the reverse signal input end of the comparator TA; the other end of the electric patch Pt1 is connected with the negative electrode of the auxiliary power supply;
one end of the resistor R3 is connected with one end of the resistor R1, the other end of the resistor R3 is connected with the positive power supply end of the comparator TA,
the positive power supply end of the comparator TA is also connected with the positive electrode of the auxiliary power supply;
one end of a buzzer B1 is connected with the positive electrode of the auxiliary power supply, the other end of a buzzer B1 is connected with one end of an AST electromagnetic valve coil, the other end of the AST electromagnetic valve coil is connected with the positive electrode of a diode D1, the negative electrode of the diode D1 is connected with one end of a resistor R4, and the other end of the resistor R4 is connected with the output end of a comparator TA;
and the negative power end of the comparator TA is connected with the negative electrode of the auxiliary power supply.
3. The temperature acquisition-based electromagnetic valve state monitoring device according to claim 2, wherein the type of the comparator TA is TAA 2761.
4. The temperature acquisition-based state monitoring device for the electromagnetic valve according to claim 2 or 3, characterized in that the resistance values of the resistor R1 and the resistor R2 are 10 kOmega.
5. The temperature acquisition-based solenoid valve state monitoring device according to claim 2 or 3, wherein the thermoelectric patch Pt1 is of type Pt 100.
6. The electromagnetic valve state monitoring device based on temperature collection according to claim 2 or 3, wherein the resistance value of the resistor R3 is 1k Ω.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921923215.5U CN210400652U (en) | 2019-11-08 | 2019-11-08 | Electromagnetic valve state monitoring device based on temperature acquisition |
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| CN201921923215.5U CN210400652U (en) | 2019-11-08 | 2019-11-08 | Electromagnetic valve state monitoring device based on temperature acquisition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646108A (en) * | 2019-11-08 | 2020-01-03 | 哈尔滨汽轮机厂有限责任公司 | Electromagnetic valve state monitoring device based on temperature acquisition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110646108A (en) * | 2019-11-08 | 2020-01-03 | 哈尔滨汽轮机厂有限责任公司 | Electromagnetic valve state monitoring device based on temperature acquisition |
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