Remote control circuit of electric butterfly valve

Abstract

The utility model relates to a remote control circuit of an electric butterfly valve. The remote control circuit comprises a storage battery, a power module, a GSM module, a Beidou module, a single-chip microcomputer, a forward rotation switch module and a reverse rotation switch module. The input end of the power module is connected with the storage battery, the output end of the power module is electrically connected with the power input ends of the GSM module, the Beidou module and the single-chip microcomputer, the receiving and transmitting end of the GSM module is electrically connected with the I / O port of the single-chip microcomputer, and the receiving and transmitting end of the Beidou module is electrically connected with the I / O port of the single-chip microcomputer. The output end of the single-chip microcomputer is electrically connected with the control end of the forward rotation switch module and the control end of the reverse rotation switch module. According to the utility model, the remote communication terminal sends a forward rotation or reverse rotation control instruction to the single-chip microcomputer through the GSM module or the Beidou module, and the single-chip microcomputer controls the on / off of the forward rotation switch module and the reverse rotation switch module according to the forward rotation or reverse rotation control instruction so as to realize the forward rotation and reverse rotation of the butterfly valve driving motor. Therefore, opening and closing of the electric butterfly valve can be remotely controlled.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve control technical field, concretely relates to a remote control circuit of electric butterfly valve. BACKGROUND

[0002] Electric butterfly valve, usually adopt motor drive, utilize motor drive butterfly valve's valve rod to realize the opening and closing of butterfly valve, for the convenience realization remote control, usually will utilize motor controller control motor's positive rotation and reverse rotation to realize the opening and closing of electric butterfly valve, in view of intelligent communication terminal uses widely, existing wired control cannot satisfy the remote control of intelligent communication terminal. CONTENT OF UTILITY MODEL

[0003] In order to solve the technical problem that cannot utilize intelligent communication terminal to remote control electric butterfly valve in prior art, the utility model provides a remote control circuit of electric butterfly valve.

[0004] The utility model solves the technical scheme of foregoing technical problem as follows:

[0005] A remote control circuit of electric butterfly valve, including battery, power module, GSM module, big dipper module, singlechip, positive rotation switch module and reverse rotation switch module, the input of power module is connected with battery electricity, the output of power module is connected with the power input of GSM module, the power input of big dipper module and the power input of singlechip electricity respectively, the transceiver end of GSM module is connected with the first I / O port of singlechip electricity, the transceiver end of big dipper module is connected with the second I / O port of singlechip electricity, the output of singlechip is connected with the control end of positive rotation switch module and the control end of reverse rotation switch module electricity respectively,

[0006] The positive pole of the power input of positive rotation switch module is connected with the output of power module electricity, the negative pole of the power input of positive rotation switch module is grounded, the positive rotation switch module includes two groups of contacts, and each group of contacts includes two normally open contacts;One normally open contact of a group of contacts of the positive rotation switch module is connected with motor working power, and the other normally open contact of the group of contacts of the positive rotation switch module is connected with one power input end of butterfly valve drive motor electricity;One normally open contact of another group of contacts of the positive rotation switch module is grounded, and the other normally open contact of the group of contacts of the positive rotation switch module is connected with another power input end of the butterfly valve drive motor electricity;

[0007] The positive pole of the power input end of the reverse switch module is electrically connected with the output end of the power module, and the negative pole of the power input end of the reverse switch module is grounded, the reverse switch module comprises two groups of contacts, and each group of contacts comprises two normally open contacts; one normally open contact of one group of contacts of the reverse switch module is electrically connected with one power input end of the butterfly valve driving motor, and the other normally open contact of the one group of contacts of the reverse switch module is grounded; one normally open contact of the other group of contacts of the reverse switch module is electrically connected with the other power input end of the butterfly valve driving motor, and the other normally open contact of the other group of contacts of the reverse switch module is connected with the motor working power supply.

[0008] The remote communication terminal can perform wireless communication with the single-chip microcomputer through the GSM module or the Beidou module, the remote communication terminal sends the forward rotation or reverse rotation control instruction to the single-chip microcomputer through the GSM module or the Beidou module, the single-chip microcomputer controls the forward rotation switch module and the reverse rotation switch module to be turned on or turned off according to the forward rotation or reverse rotation control instruction, and the remote control of the forward rotation and the reverse rotation of the butterfly valve driving motor is realized, so that the opening and the closing of the electric butterfly valve are controlled in the mode of remote communication.

[0009] On the basis of the above technical scheme, the utility model still can make improvement as follows.

[0010] Further, the first nearest drive switch and the second nearest drive switch are further included, one end of the first nearest drive switch and one end of the second nearest drive switch are electrically connected with the output end of the power module, the third I / O port of the single-chip microcomputer is electrically connected with the other end of the first nearest drive switch and the other end of the second nearest drive switch respectively, and the first nearest drive switch and the second nearest drive switch are interlocked.

[0011] The beneficial effect of the above further scheme is that the opening and the closing of the electric butterfly valve can be performed on the electric butterfly valve by setting the first nearest drive switch and the second nearest drive switch, so that the control of the electric butterfly valve can be performed on the butterfly valve site.

[0012] Further, the emergency stop switch is further included, one end of the emergency stop switch is electrically connected with the output end of the power module, and the other end of the emergency stop switch is electrically connected with the positive pole of the power input end of the forward rotation switch module and the positive pole of the power input end of the reverse switch module respectively.

[0013] The beneficial effect of the above further scheme is that the power supply of the forward rotation switch module and the reverse switch module can be cut off by pressing the emergency stop switch when emergency stop is needed, so that the emergency stop of the butterfly valve driving motor is realized.

[0014] Further, the first signal amplifier and the second signal amplifier are further included, the output end of the single-chip microcomputer is electrically connected with the input end of the first signal amplifier and the input end of the second signal amplifier respectively, the output end of the first signal amplifier is electrically connected with the control end of the forward rotation switch module, and the output end of the second signal amplifier is electrically connected with the control end of the reverse rotation switch module.

[0015] The beneficial effect of the above further scheme is that the driving capability of the single-chip microcomputer can be improved by arranging the first signal amplifier and the second signal amplifier.

[0016] Further, the first signal amplifier includes a first operational amplifier, a first resistor and a second resistor, the non-inverting input end of the first operational amplifier is electrically connected with the output end of the single-chip microcomputer, one end of the first resistor is electrically connected with the output end of the first operational amplifier, the other end of the first resistor is electrically connected with the inverting input end of the first operational amplifier and one end of the second resistor respectively, the other end of the second resistor is grounded, and the output end of the first operational amplifier is electrically connected with the control end of the forward rotation switch module.

[0017] Further, the second signal amplifier includes a second operational amplifier, a third resistor and a fourth resistor, the non-inverting input end of the second operational amplifier is electrically connected with the output end of the single-chip microcomputer, one end of the third resistor is electrically connected with the output end of the second operational amplifier, the other end of the third resistor is electrically connected with the inverting input end of the second operational amplifier and one end of the fourth resistor respectively, the other end of the fourth resistor is grounded, and the output end of the second operational amplifier is electrically connected with the control end of the reverse rotation switch module.

[0018] Further, the forward rotation switch module includes a first triode, a fifth resistor, a sixth resistor and a first relay, one end of the fifth resistor is electrically connected with the output end of the first operational amplifier, the other end of the fifth resistor is electrically connected with the base of the first triode and one end of the sixth resistor respectively, the other end of the sixth resistor and the emitter of the first triode are grounded, one end of the coil of the first relay is electrically connected with the output end of the power module, the other end of the coil of the first relay is electrically connected with the collector of the first triode, and the first relay includes two groups of contacts of the forward rotation switch module.

[0019] Further, the forward rotation switch module further includes a forward rotation limit switch, one end of the forward rotation limit switch is electrically connected with the output end of the power module, and the other end of the forward rotation limit switch is electrically connected with one end of the coil of the first relay.

[0020] Further, the reverse switch module comprises a second triode, a seventh resistor, an eighth resistor and a second relay; one end of the seventh resistor is electrically connected with the output end of the second operational amplifier, the other end of the seventh resistor is electrically connected with the base of the second triode and one end of the eighth resistor respectively, the other end of the eighth resistor and the emitter of the second triode are grounded, one end of the coil of the second relay is electrically connected with the output end of the power module, the other end of the coil of the second relay is electrically connected with the collector of the second triode, and the second relay comprises two groups of contacts of the reverse switch module.

[0021] Further, the reverse switch module further comprises a reverse limit switch, one end of the reverse limit switch is electrically connected with the output end of the power module, and the other end of the reverse limit switch is electrically connected with one end of the coil of the second relay. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the circuit schematic diagram of the utility model;

[0023] Figure 2 It is the circuit schematic diagram of the first signal amplifier in the utility model embodiment;

[0024] Figure 3 It is the circuit schematic diagram of the second signal amplifier in the utility model embodiment;

[0025] Figure 4 It is the circuit schematic diagram of the positive rotation switch module and the reverse switch module. DETAILED DESCRIPTION

[0026] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and are not used to limit the scope of the utility model.

[0027] As Figure 1The embodiment shown provides a remote control circuit of an electric butterfly valve, which comprises a battery U1, a power module U2, a GSM module U3, a Beidou module U4, a single-chip microcomputer U5, a forward rotation switch module U6 and a reverse rotation switch module U7; the input end of the power module U2 is electrically connected with the battery U1, the output end of the power module U2 is electrically connected with the power input end of the GSM module U3, the power input end of the Beidou module U4 and the power input end of the single-chip microcomputer U5, respectively, the transceiving end of the GSM module U3 is electrically connected with the first I / O port of the single-chip microcomputer U5, the transceiving end of the Beidou module U4 is electrically connected with the second I / O port of the single-chip microcomputer U5, and the output end of the single-chip microcomputer U5 is electrically connected with the control end of the forward rotation switch module U6 and the control end of the reverse rotation switch module U7, respectively; the first I / O port of the single-chip microcomputer U5 comprises two pins, which are PB10 pin and PB11 pin of the single-chip microcomputer, respectively; the second I / O port of the single-chip microcomputer U5 comprises two pins, which are PA3 pin and PA2 pin of the single-chip microcomputer, respectively.

[0028] The positive pole of the power input end of the forward rotation switch module U6 is electrically connected with the output end of the power module U2, and the negative pole of the power input end of the forward rotation switch module U6 is grounded, the forward rotation switch module comprises two groups of contacts, each group of contacts comprises two normally open contacts; one normally open contact of one group of contacts of the forward rotation switch module U6 is connected with a motor working power source, and the other normally open contact of one group of contacts of the forward rotation switch module U6 is electrically connected with one power input end of the butterfly valve driving motor M; one normally open contact of the other group of contacts of the forward rotation switch module U6 is grounded, and the other normally open contact of the other group of contacts of the forward rotation switch module U6 is electrically connected with the other power input end of the butterfly valve driving motor M.

[0029] The positive pole of the power input end of the reverse rotation switch module U7 is electrically connected with the output end of the power module U2, and the negative pole of the power input end of the reverse rotation switch module U7 is grounded, the reverse rotation switch module comprises two groups of contacts, each group of contacts comprises two normally open contacts; one normally open contact of one group of contacts of the reverse rotation switch module U7 is electrically connected with one power input end of the butterfly valve driving motor M, and the other normally open contact of one group of contacts of the reverse rotation switch module U7 is grounded; one normally open contact of the other group of contacts of the reverse rotation switch module U7 is electrically connected with the other power input end of the butterfly valve driving motor M, and the other normally open contact of the other group of contacts of the reverse rotation switch module U7 is connected with the motor working power source.

[0030] The GSM module U3 is a remote communication module with a model of SIM800C, the Beidou module U4 is specifically a TD3020C Beidou satellite wireless communication module, and the TD3020C is a communication module compatible with a HX6317 Beidou and GPS dual-mode receiver navigation module; the battery is a rechargeable battery, the voltage of the battery is 12V, and the output end of the power module U2 at least includes two output ends, one of which outputs a voltage of 3.3V, and the other outputs a voltage of 12V; the motor working power source can be selected from 24V, 36V, 48V or 110V DC power sources, etc. The output end with the output of 3.3V of the power module U2 is used for supplying power for the GSM module U3, the Beidou module U4 and the single-chip microcomputer U5, and the output end with the output of 12V of the power module U2 is used for supplying power for the forward rotation switch module U6 and the reverse rotation switch module U7. The power module U2 can be directly selected as a 12V to 3.3V DC voltage reduction module, and since the output voltage of the battery is 12V, the 12V output end of the power module U2 can be directly connected with the input end of the power module U2 through a wire or a conductor.

[0031] The remote communication terminal can perform wireless communication with the single-chip microcomputer U5 through the GSM module U3 or the Beidou module U4, the remote communication terminal sends a forward rotation or reverse rotation control instruction to the single-chip microcomputer U5 through the GSM module U3 or the Beidou module U4, the single-chip microcomputer U5 controls the forward rotation switch module U6 and the reverse rotation switch module U7 to be turned on or turned off according to the forward rotation or reverse rotation control instruction, so as to realize remote control of the forward rotation and the reverse rotation of the butterfly valve driving motor M, and thus the opening and closing of the electric butterfly valve are realized through the mode of remote communication. It should be noted that the communication between the communication terminal and the single-chip microcomputer through the GSM module U3 or the Beidou module U4 is the common technical knowledge in the field, and the technology of sending a control instruction to the single-chip microcomputer through the wireless communication module by the remote communication terminal to realize the output of a control signal of the single-chip microcomputer is also a common technology, therefore, the computer control is not improved in the utility model, but the circuit entity is improved.

[0032] In some embodiments, the remote control circuit of the electric butterfly valve further includes a first local drive switch S1 and a second local drive switch S2, one end of the first local drive switch S1 and one end of the second local drive switch S2 are electrically connected with the output end of the power module U2, the third I / O port of the single-chip microcomputer U5 is electrically connected with the other end of the first local drive switch S1 and the other end of the second local drive switch S2 respectively, and the first local drive switch S1 and the second local drive switch S2 are interlocked. The third I / O port of the single-chip microcomputer U5 includes two pins, which are PB13 pin and PB14 pin respectively, the first local drive switch S1 is connected with the PB13 pin, and the second local drive switch S2 is connected with the PB14 pin.

[0033] By pressing the first nearest drive switch S1 or the second nearest drive switch S2, a high-level control instruction is sent to the I / O port of the single-chip microcomputer, and after the single-chip microcomputer receives the high-level control signal of the corresponding interface, a high-level control signal is output to the corresponding output end to control the on-off of the positive rotation switch module or the reverse rotation switch, so as to control the opening and closing of the electric butterfly valve, thereby facilitating the control of the electric butterfly valve on site.

[0034] In some embodiments, the remote control circuit of the electric butterfly valve further comprises an emergency stop switch S3, one end of the emergency stop switch S3 is electrically connected with the output end of the power module U2, and the other end of the emergency stop switch S3 is electrically connected with the positive pole of the power input end of the positive rotation switch module U6 and the positive pole of the power input end of the reverse rotation switch module U7 respectively.

[0035] By setting the emergency stop switch S3, the emergency stop switch S3 can be pressed when emergency stop is needed to cut off the power supply of the positive rotation switch module U6 and the reverse rotation switch module U7, thereby realizing the emergency stop of the butterfly valve driving motor M.

[0036] In some embodiments, the remote control circuit of the electric butterfly valve further comprises a first signal amplifier U8 and a second signal amplifier U9, the output end of the single-chip microcomputer U5 is electrically connected with the input end of the first signal amplifier U8 and the input end of the second signal amplifier U9 respectively, the output end of the first signal amplifier U8 is electrically connected with the control end of the positive rotation switch module U6, and the output end of the second signal amplifier U9 is electrically connected with the control end of the reverse rotation switch module U7. By setting the first signal amplifier U8 and the second signal amplifier U9, the driving capability of the single-chip microcomputer can be improved.

[0037] As shown in Figure 2 The first signal amplifier U8 comprises a first operational amplifier U10, a first resistor R1 and a second resistor R2, the non-inverting input end of the first operational amplifier U10 is electrically connected with the output end of the single-chip microcomputer U5, one end of the first resistor R1 is electrically connected with the output end of the first operational amplifier U10, the other end of the first resistor R1 is electrically connected with the inverting input end of the first operational amplifier U10 and one end of the second resistor R2 respectively, the other end of the second resistor R2 is grounded, and the output end of the first operational amplifier U10 is electrically connected with the control end of the positive rotation switch module U6. The first signal amplifier U10 is a non-inverting amplifier, the voltage Vout of the output end of the first operational amplifier U10 is equal to 1+R1 / R2 Vin, R1 represents the voltage value of the first resistor R1, R2 represents the voltage value of the second resistor R2, and Vin represents the voltage value of the non-inverting input end of the first operational amplifier U10.

[0038] As shown in Figure 3As shown, the second signal amplifier U9 comprises a second operational amplifier U11, a third resistor R3 and a fourth resistor R4, the noninverting input terminal of the second operational amplifier U11 is electrically connected with the output terminal of the single-chip microcomputer U5, one end of the third resistor R3 is electrically connected with the output terminal of the second operational amplifier U11, the other end of the third resistor R3 is electrically connected with the inverting input terminal of the second operational amplifier U11 and one end of the fourth resistor R4 respectively, the other end of the fourth resistor R4 is grounded, and the output terminal of the second operational amplifier U11 is electrically connected with the control terminal of the reverse rotation switch module U7. The second signal amplifier U11 is the same noninverting amplifier as the first signal amplifier U11, and the resistance value of the third resistor R3 is equal to the voltage value of the first resistor R1, and the resistance value of the fourth resistor R4 is equal to the resistance value of the second resistor R2, thus the amplification multiple of the second signal amplifier U9 is the same as that of the first signal amplifier U8.

[0039] As shown in the figure, Figure 4 As shown, the positive rotation switch module U6 comprises a first triode Q1, a fifth resistor R5, a sixth resistor R6 and a first relay K1; one end of the fifth resistor R5 is electrically connected with the output terminal of the first operational amplifier U10, the other end of the fifth resistor R5 is electrically connected with the base of the first triode Q1 and one end of the sixth resistor R6 respectively, the other end of the sixth resistor R6 and the emitter of the first triode Q1 are grounded, one end of the coil of the first relay K1 is electrically connected with the output terminal of the power supply module U2, the other end of the coil of the first relay K1 is electrically connected with the collector of the first triode Q1, and the first relay K1 comprises two groups of contacts of the positive rotation switch module.

[0040] When the high level signal outputted by the output terminal PB15 of the single-chip microcomputer is amplified by the first signal amplifier U8, the base of the first triode Q1 is at high level, the first triode Q1 is turned on, the coil of the first relay K1 is electrified, the normally open contact of the first relay K1 is attracted, the butterfly valve driving motor is electrified, and the electrically controlled butterfly valve is opened.

[0041] In some embodiments, the positive rotation switch module U6 further comprises a positive rotation limit switch S4, one end of the positive rotation limit switch S4 is electrically connected with the output terminal of the power supply module U2, and the other end of the positive rotation limit switch S4 is electrically connected with one end of the coil of the first relay K1. By setting the positive rotation limit switch S4, the positive rotation limit switch S4 is installed at the limit position of the opening side of the electrically controlled butterfly valve, when the valve shaft of the electrically controlled butterfly valve rotates to the opening side, the positive rotation limit switch S4 is triggered when the valve shaft rotates to the limit position, the positive rotation limit switch S4 is disconnected, the coil of the first relay K1 loses electricity, the butterfly valve driving motor loses electricity, and the positive rotation is stopped.

[0042] In some embodiments, the positive rotation switch module U6 further comprises a first diode D1, a negative electrode of the first diode D1 is electrically connected with one end of the coil of the first relay K1, and a positive electrode of the first diode D1 is electrically connected with the other end of the coil of the first relay K1. By connecting the first diode D1 across the coil of the first relay K1, the main function is to absorb the inrush current and protect other elements in the circuit from damage. When the electromagnetic coil is powered off, due to the principle of electromagnetic induction, a certain amount of energy will be stored in the coil. If the power is directly turned off, a very high back electromotive force will be generated across the coil, which may damage the coil or other electronic components. By connecting a diode in parallel across the coil, the one-way conductivity of the diode can be used to release the energy in the coil through the diode, thereby avoiding the generation of back electromotive force and protecting other elements in the circuit.

[0043] As shown in Figure 4 The reverse rotation switch module U7 includes a second triode Q2, a seventh resistor R7, an eighth resistor R8, and a second relay K2. One end of the seventh resistor R7 is electrically connected with the output terminal of the second operational amplifier U11, the other end of the seventh resistor R7 is electrically connected with the base of the second triode Q2 and one end of the eighth resistor R8 respectively, the other end of the eighth resistor R8 and the emitter of the second triode Q2 are both grounded, one end of the coil of the second relay K2 is electrically connected with the output terminal of the power module U2, the other end of the coil of the second relay K2 is electrically connected with the collector of the second triode Q2, and the second relay K2 includes two groups of contacts of the reverse rotation switch module. When the PB16 interface output of the single-chip microcomputer outputs a high-level signal after being amplified by the second signal amplifier U4, the base of the second triode Q2 is at a high level, the second triode Q2 is turned on, the coil of the second relay K2 is powered on, the normally open contact of the second relay K2 is attracted, the butterfly valve driving motor is powered on, and the electrically controlled butterfly valve is driven to close.

[0044] In some embodiments, the reverse switch module U7 further comprises a reverse limit switch S5, one end of the reverse limit switch S5 is electrically connected with the output end of the power supply module U2, and the other end of the reverse limit switch S5 is electrically connected with one end of the coil of the second relay K2. By arranging the reverse limit switch S5, the reverse limit switch S5 is installed at the limit position of the closing side of the electric control butterfly valve, when the valve shaft of the electric control butterfly valve rotates to the closing side, the reverse limit switch S5 is triggered when the valve shaft rotates to the limit position, the reverse limit switch S5 is disconnected, the coil of the second relay K2 loses power, the butterfly valve driving motor loses power, and the reverse rotation is stopped. Two limit blocks can be arranged on the valve shaft of the electric control butterfly valve, the two limit blocks are arranged on the two sides of the valve shaft of the electric control butterfly valve, and the forward limit switch S4 and the reverse limit switch S5 are arranged on the two sides of the valve shaft of the electric control butterfly valve, when one of the two limit blocks triggers the forward limit switch S4, the butterfly valve driving motor loses power and the forward rotation is stopped, and when the other of the two limit blocks triggers the reverse limit switch S5, the butterfly valve driving motor loses power and the reverse rotation is stopped.

[0045] In some embodiments, the reverse switch module U7 further comprises a second diode D2, the negative electrode of the second diode D2 is electrically connected with one end of the coil of the second relay K2, and the positive electrode of the second diode D2 is electrically connected with the other end of the coil of the second relay K2. By connecting the second diode D2 across the coil of the second relay K2, the main function is to absorb the impact current and protect other elements in the circuit from being damaged. When the electromagnetic coil loses power, due to the principle of electromagnetic induction, a certain amount of energy will be stored in the coil, and if the power is directly cut off, a very high counter electromotive force will be generated across the coil, which may damage the coil or other electronic elements. By connecting a diode in parallel across the coil, the energy in the coil can be discharged through the diode by using the unidirectional conductivity of the diode, thereby avoiding the generation of counter electromotive force and protecting other elements in the circuit.

[0046] The above merely describes the preferred embodiments of the utility model and is not intended to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the concept and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. A remote control circuit for an electrically operated butterfly valve, characterized in that: The utility model relates to a butterfly valve drive motor control system, including battery (U1), power module (U2), GSM module (U3), big dipper module (U4), singlechip (U5), positive rotation switch module (U6) and reverse switch module (U7), the input of power module (U2) with battery (U1) electricity is connected, the output of power module (U2) respectively with GSM module (U3) power input, big dipper module (U4) power input and singlechip (U5) power input electricity is connected, the transceiver end of GSM module (U3) with singlechip (U5) first I / O port electricity is connected, the transceiver end of big dipper module (U4) with singlechip (U5) second I / O port electricity is connected, the output of singlechip (U5) respectively with positive rotation switch module (U6) control end and reverse switch module (U7) control end electricity is connected, the positive pole of power input of positive rotation switch module (U6) is connected with the output of power module (U2), the negative pole of power input of positive rotation switch module (U6) is grounded, and the positive rotation switch module includes two groups of contacts, and each group of contacts includes two normally open contacts; one normally open contact of a group of contacts of positive rotation switch module (U6) is connected with a power input end of butterfly valve drive motor (M), and the other normally open contact of a group of contacts of positive rotation switch module (U6) is connected with another power input end of butterfly valve drive motor (M); one normally open contact of another group of contacts of positive rotation switch module (U6) is grounded, and the other normally open contact of another group of contacts of positive rotation switch module (U6) is connected with the motor operating power. The positive pole of power input of reverse switch module (U7) is connected with the output of power module (U2), and the negative pole of power input of reverse switch module (U7) is grounded, and the reverse switch module includes two groups of contacts, and each group of contacts includes two normally open contacts; one normally open contact of a group of contacts of reverse switch module (U7) is connected with a power input end of butterfly valve drive motor (M), and the other normally open contact of a group of contacts of reverse switch module (U7) is grounded; one normally open contact of another group of contacts of reverse switch module (U7) is connected with another power input end of butterfly valve drive motor (M), and the other normally open contact of another group of contacts of positive rotation switch module (U6) is connected with the motor operating power.

2. The remote control circuit for an electrically powered butterfly valve according to claim 1, characterized in that: It further includes a first nearest drive switch (S1) and a second nearest drive switch (S2), one end of the first nearest drive switch (S1) and one end of the second nearest drive switch (S2) are electrically connected with the output of the power module (U2), the third I / O port of the singlechip (U5) is electrically connected with the other end of the first nearest drive switch (S1) and the other end of the second nearest drive switch (S2) respectively; the first nearest drive switch (S1) and the second nearest drive switch (S2) are interlocked.

3. The remote control circuit for an electrically powered butterfly valve according to claim 1, characterized in that: It also includes an emergency stop switch (S3), one end of which is electrically connected to the output terminal of the power module (U2), and the other end of which is electrically connected to the positive terminal of the power input terminal of the forward switch module (U6) and the positive terminal of the power input terminal of the reverse switch module (U7).

4. The remote control circuit for an electrically powered butterfly valve according to claim 1, characterized in that: It also includes a first signal amplifier (U8) and a second signal amplifier (U9). The output terminal of the microcontroller (U5) is electrically connected to the input terminal of the first signal amplifier (U8) and the input terminal of the second signal amplifier (U9), respectively. The output terminal of the first signal amplifier (U8) is electrically connected to the control terminal of the forward switch module (U6), and the output terminal of the second signal amplifier (U9) is electrically connected to the control terminal of the reverse switch module (U7).

5. The remote control circuit for an electrically powered butterfly valve according to claim 4, characterized in that: The first signal amplifier (U8) includes a first operational amplifier (U10), a first resistor (R1), and a second resistor (R2). The non-inverting input of the first operational amplifier (U10) is electrically connected to the output of the microcontroller (U5). One end of the first resistor (R1) is electrically connected to the output of the first operational amplifier (U10). The other end of the first resistor (R1) is electrically connected to the inverting input of the first operational amplifier (U10) and one end of the second resistor (R2). The other end of the second resistor (R2) is grounded. The output of the first operational amplifier (U10) is electrically connected to the control terminal of the forward rotation switch module (U6).

6. The remote control circuit for an electrically powered butterfly valve according to claim 5, characterized in that: The second signal amplifier (U9) includes a second operational amplifier (U11), a third resistor (R3), and a fourth resistor (R4). The non-inverting input of the second operational amplifier (U11) is electrically connected to the output of the microcontroller (U5). One end of the third resistor (R3) is electrically connected to the output of the second operational amplifier (U11), and the other end of the third resistor (R3) is electrically connected to the inverting input of the second operational amplifier (U11) and one end of the fourth resistor (R4). The other end of the fourth resistor (R4) is grounded. The output of the second operational amplifier (U11) is electrically connected to the control terminal of the inverting switch module (U7).

7. The remote control circuit for an electrically powered butterfly valve according to claim 6, characterized in that: The positive rotation switch module (U6) includes a first triode (Q1), a fifth resistor (R5), a sixth resistor (R6) and a first relay (K1); one end of the fifth resistor (R5) is electrically connected with the output end of the first operational amplifier (U10), the other end of the fifth resistor (R5) is electrically connected with the base of the first triode (Q1) and one end of the sixth resistor (R6) respectively, the other end of the sixth resistor (R6) and the emitter of the first triode (Q1) are grounded, one end of the coil of the first relay (K1) is electrically connected with the output end of the power module (U2), the other end of the coil of the first relay (K1) is electrically connected with the collector of the first triode (Q1), and the first relay (K1) includes two groups of contacts of the positive rotation switch module.

8. The remote control circuit for an electrically powered butterfly valve according to claim 7, characterized in that: The positive rotation switch module (U6) further includes a positive rotation limit switch (S4), one end of the positive rotation limit switch (S4) is electrically connected with the output end of the power module (U2), and the other end of the positive rotation limit switch (S4) is electrically connected with one end of the coil of the first relay (K1).

9. The remote control circuit for an electrically powered butterfly valve according to claim 6, characterized in that: The reverse rotation switch module (U7) includes a second triode (Q2), a seventh resistor (R7), an eighth resistor (R8) and a second relay (K2); one end of the seventh resistor (R7) is electrically connected with the output end of the second operational amplifier (U11), the other end of the seventh resistor (R7) is electrically connected with the base of the second triode (Q2) and one end of the eighth resistor (R8) respectively, the other end of the eighth resistor (R8) and the emitter of the second triode (Q2) are grounded, one end of the coil of the second relay (K2) is electrically connected with the output end of the power module (U2), the other end of the coil of the second relay (K2) is electrically connected with the collector of the second triode (Q2), and the second relay (K2) includes two groups of contacts of the reverse rotation switch module.

10. The remote control circuit for an electrically powered butterfly valve according to claim 9, characterized in that: The reverse rotation switch module (U7) further includes a reverse rotation limit switch (S5), one end of the reverse rotation limit switch (S5) is electrically connected with the output end of the power module (U2), and the other end of the reverse rotation limit switch (S5) is electrically connected with one end of the coil of the second relay (K2).

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