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CN-224214812-U - Electric control stop valve

CN224214812UCN 224214812 UCN224214812 UCN 224214812UCN-224214812-U

Abstract

The utility model discloses an electric control stop valve, belongs to the technical field of stop valves, and solves the problems that the performance of the electric control stop valve is reduced, and finally the valve performance is deteriorated and even a system fails due to turn-to-turn short circuit and aging of coils in the working process of the electric control stop valve. The intelligent electromagnetic valve comprises a valve body, an electromagnetic coil arranged on the valve body and a monitoring protection circuit coupled with the electromagnetic coil, wherein the monitoring protection circuit monitors turn-to-turn short circuit and overheat states of the electromagnetic coil in real time and triggers the electromagnetic coil to be cut off after confirming faults. When the stop valve works, the turn-to-turn short circuit and overheat state of the coil of the electric control stop valve can be monitored in real time, and the relay is immediately triggered to cut off the main power supply of the electromagnetic coil after confirming the fault, so that the performance degradation caused by the turn-to-turn short circuit and ageing of the coil of the electric control stop valve in the working process is avoided, and finally the valve performance is deteriorated even the system fault is caused.

Inventors

  • ZHANG SHIBO
  • XIE CHUNCHUN

Assignees

  • 胜得龙阀门(丽水)有限公司

Dates

Publication Date
20260508
Application Date
20250628

Claims (9)

  1. 1. The electric control stop valve is characterized by comprising a valve body, an electromagnetic coil arranged on the valve body and a monitoring protection circuit coupled with the electromagnetic coil, wherein the monitoring protection circuit monitors the turn-to-turn short circuit and overheat state of the electromagnetic coil in real time and triggers the electromagnetic coil to be cut off after confirming faults.
  2. 2. The electrically controlled shut-off valve according to claim 1, wherein the monitoring protection circuit comprises a power module (1), a resistance monitoring module, a temperature monitoring module (3), a logic control module (4) and an execution module (5), wherein the input end of the power module (1) is connected with an external 24VDC power supply, the first output end of the power module (1) provides a constant current reference voltage for the resistance monitoring module, the second output end of the power module (1) provides a bridge power supply for the temperature monitoring module (3), the third output end of the power module (1) provides an operating voltage for the logic control module (4), the current injection end of the resistance monitoring module is connected with the first end of the electromagnetic coil, the sampling end of the resistance monitoring module is connected between the second end of the electromagnetic coil and the ground wire, the signal output end of the resistance monitoring module is connected with the first input end of the logic control module (4), the temperature sensing end of the temperature monitoring module (3) is attached to the electromagnetic coil, the signal output end of the temperature monitoring module (3) is connected with the second input end of the logic control module (4), the current injection end of the resistance monitoring module is connected with the first end of the electromagnetic coil (5), and the current injection end of the resistance monitoring module is connected with the execution module (5) in series with the power supply loop.
  3. 3. The electrically controlled stop valve according to claim 2, wherein the power module (1) comprises an LM7812 three-terminal voltage regulator, a first filter capacitor and a second filter capacitor, the input end of the LM7812 three-terminal voltage regulator is connected to an external 24VDC power supply, the ground of the LM7812 three-terminal voltage regulator is grounded, the output end of the LM7812 three-terminal voltage regulator outputs 12V voltage, the positive electrode of the first filter capacitor is connected to the input end of the LM7812 three-terminal voltage regulator, the negative electrode of the first filter capacitor is grounded, and the second filter capacitor is connected in parallel between the output end of the LM7812 three-terminal voltage regulator and ground.
  4. 4. The electrically controlled shut-off valve of claim 2 wherein the resistance monitoring module comprises a REF5050 reference source, a LM334 constant current source, a first resistor, an INA128 instrumentation amplifier, a sampling resistor, a first LM339 voltage comparator, and a first resistor divider circuit, wherein the electrical terminal of the REF5050 reference source is connected to a 12V voltage, the output of the REF5050 reference source outputs a 5V reference, the current regulation terminal of the LM334 constant current source is connected in series with the first resistor and then grounded, the positive voltage terminal of the LM334 constant current source is connected to the output of the REF5050 reference source, the negative voltage terminal of the LM334 constant current source is connected to the first terminal of the electromagnetic coil, the first input terminal of the INA128 instrumentation amplifier is connected to the first terminal of the electromagnetic coil, the second input terminal of the INA128 instrumentation amplifier is connected in series with the sampling resistor and then grounded, the non-inverting input terminal of the first LM339 voltage comparator is connected to the output terminal of the INA128 instrumentation amplifier, and the inverting input terminal of the first LM voltage comparator is connected to the first resistor divider circuit.
  5. 5. The electrically controlled shut-off valve of claim 4 wherein the first resistor divider circuit comprises a first divider resistor and a second divider resistor, one end of the first divider resistor is connected to the power supply, the other end of the first divider resistor is connected to one end of the second divider resistor, the other end of the second divider resistor is grounded, and the inverting input of the first LM339 voltage comparator is connected between the first divider resistor and the second divider resistor.
  6. 6. An electrically controlled shut-off valve according to claim 2, wherein the temperature monitoring module (3) comprises a thermistor, a wheatstone bridge, an AD620 instrumentation amplifier, a second resistor divider circuit, and a second LM339 voltage comparator, one end of the thermistor being grounded, the other end of the thermistor being connected to the wheatstone bridge, the output of the wheatstone bridge being connected to the input of the AD620 instrumentation amplifier, the thermistor being connected to the gain input of the AD620 instrumentation amplifier, the output of the AD620 instrumentation amplifier being connected to the non-inverting input of the second LM339 voltage comparator, the non-inverting input of the second LM339 voltage comparator being connected to the second resistor divider circuit.
  7. 7. The electrically controlled shut-off valve of claim 6 wherein the second resistor divider circuit comprises a third divider resistor and a fourth divider resistor, one end of the third divider resistor is connected to the power supply, the other end of the third divider resistor is connected to one end of the fourth divider resistor, the other end of the fourth divider resistor is grounded, and the inverting input of the second LM339 voltage comparator is connected between the third divider resistor and the fourth divider resistor.
  8. 8. An electrically controlled shut-off valve according to claim 2, wherein the logic control module (4) comprises a CD4071 or gate, a NE555 timer and a ULN2003 driver chip, two input ends of the CD4071 or gate are respectively connected with the output ends of the first LM339 voltage comparator and the second LM339 voltage comparator, the output end of the CD4071 or gate outputs a fault signal to the trigger input end of the NE555 timer, the output end of the NE555 timer is connected to the input end of the ULN2003 driver chip, and the output end of the ULN2003 driver chip outputs a driving signal.
  9. 9. An electrically controlled shut-off valve according to claim 2, characterized in that the execution module (5) comprises a transistor, a relay and a relay switch, the base of the transistor is connected with the output end of the ULN2003 driving chip, the collector of the transistor is electrically arranged, the emitter of the transistor is connected in series with the coil of the relay and then is grounded, and the relay switch is connected in series in the power supply loop of the electromagnetic coil.

Description

Electric control stop valve Technical Field The utility model relates to the technical field of stop valves, in particular to an electric control stop valve. Background The electrically controlled stop valve is one valve with electromagnetic coil to control the valve core to open and close. The main body of the valve consists of a valve body, a valve cover, a valve core, a valve rod, an electromagnetic coil and the like. When the coil is electrified, the valve core is attracted, the medium flows, and when the coil is deenergized, the valve core is reset, and the medium flow is cut off. The intelligent control system has the advantages of accurate control, high automation degree, quick response and the like, and can realize remote control and programmed operation. The device has wide application range, can adapt to different fluid media, temperature and pressure conditions, is widely applied to the fields of industrial automation, chemical industry, pharmacy, water treatment and the like, is used for accurately controlling the flow of the media in the pipeline, and ensures the stable operation of the production process. However, the performance of the electrically controlled stop valve is reduced due to turn-to-turn short circuit and aging of the coil in the working process, so that the valve performance is finally deteriorated and even the system is in fault. An electrically controlled shut-off valve is therefore proposed to solve or alleviate the above-mentioned problems. Disclosure of utility model The utility model aims to solve the defects in the prior art and provides an electric control stop valve. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The utility model provides an automatically controlled stop valve, includes the valve body, sets up solenoid on the valve body and with solenoid coupling monitor protection circuit, monitor protection circuit real-time supervision solenoid's turn-to-turn short circuit and overheat state and trigger after confirming the trouble and cut off solenoid and connect the electricity. Preferably, the monitoring protection circuit comprises a power module, a resistance monitoring module, a temperature monitoring module, a logic control module and an execution module, wherein the input end of the power module is connected with an external 24VDC power supply, the first output end of the power module provides constant-current reference voltage for the resistance monitoring module, the second output end of the power module provides bridge power for the temperature monitoring module, the third output end of the power module provides working voltage for the logic control module, the current injection end of the resistance monitoring module is connected with the first end of an electromagnetic coil, the sampling end of the resistance monitoring module is connected between the second end of the electromagnetic coil and a ground wire, the signal output end of the resistance monitoring module is connected with the first input end of the logic control module, the temperature sensing end of the temperature monitoring module is attached to the electromagnetic coil, the signal output end of the temperature monitoring module is connected with the second input end of the logic control module, the driving output end of the logic control module is connected with the control end of the execution module, the power input end of the execution module is connected with the positive pole of the 24VDC power supply, and the controlled output end of the execution module is connected in series in a power supply loop of the electromagnetic coil. Preferably, the power module includes an LM7812 three-terminal voltage regulator, a first filter capacitor and a second filter capacitor, an input end of the LM7812 three-terminal voltage regulator is connected with an external 24VDC power supply, a ground connection of the LM7812 three-terminal voltage regulator is grounded, an output end of the LM7812 three-terminal voltage regulator outputs 12V voltage, an anode of the first filter capacitor is connected with an input end of the LM7812 three-terminal voltage regulator, a cathode of the first filter capacitor is grounded, and the second filter capacitor is connected between an output end of the LM7812 three-terminal voltage regulator and ground in parallel. Preferably, the resistance monitoring module comprises a REF5050 reference source, an LM334 constant current source, a first resistor, an INA128 instrument amplifier, a sampling resistor, a first LM339 voltage comparator, and a first resistor divider circuit, wherein the electrical connection end of the REF5050 reference source is connected with 12V voltage, the output end of the REF5050 reference source outputs 5V reference, the current regulation end of the LM334 constant current source is connected with the first resistor in series and then grounded, the positive voltage end of the LM334 constan