CN109994996A - Belt blows warning circuit, motor power-off control circuit and the pumping unit using it - Google Patents
Belt blows warning circuit, motor power-off control circuit and the pumping unit using it Download PDFInfo
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- CN109994996A CN109994996A CN201910143834.0A CN201910143834A CN109994996A CN 109994996 A CN109994996 A CN 109994996A CN 201910143834 A CN201910143834 A CN 201910143834A CN 109994996 A CN109994996 A CN 109994996A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0827—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors responsive to underload or no-load, e.g. pump-off control circuits for pump motors
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Abstract
The invention discloses a kind of belts to blow warning circuit, motor power-off control circuit and application its pumping unit, wherein a kind of belt blows warning circuit, comprising: controller；The controller is connect with current detection circuit (2), and the controller is also connect with warning circuit (4)；The current detection circuit (2), for detecting the electric current for the motor connecting with the belt；The controller alarm or do not alarm for controlling the warning circuit (4) according to the electric current and setting electric current.To solve after belt blows, the problem of discovery is burnt not in time reduces yield after belt oil pumping machine shuts down, and motor idle running causes the waste of electric energy.
Description
Technical field
The present invention relates to electricity field, specifically a kind of belt blows warning circuit, motor power-off control circuit and answers
With its pumping unit.
Background technique
In existing oil recovery technique, big belt pulley rotation that is most of or driving pumping unit by belt using motor
Pumping unit.When rainy season arrives, belt water inlet generates slipping phenomenon and happens occasionally, and after belt is blown, skin is burnt in discovery not in time
Band pumping unit reduces yield after shutting down, and motor idle running causes the waste of electric energy.
Summary of the invention
In view of this, the present invention, which provides a kind of belt, blows its pumping of warning circuit, motor power-off control circuit and application
Oil machine, to solve after belt blows, discovery is burnt not in time reduces yield after belt oil pumping machine shuts down, and motor dallies
The problem of causing the waste of electric energy.
In a first aspect, the present invention, which provides a kind of belt, blows warning circuit, comprising:
Controller；
The controller is connect with current detection circuit, and the controller is also connect with warning circuit；
The current detection circuit, for detecting the electric current for the motor connecting with the belt；
The controller alarm or do not alarm for controlling the warning circuit according to the electric current and setting electric current.
Preferably, the current detection circuit, comprising: current acquisition control circuit；
One end of the current acquisition control circuit is connect with the power end of the motor, the current acquisition control circuit it is another
One end is connect with the controller, for controlling whether the controller acquires the electric current.
Preferably, the current detection circuit, further includes: A/D converter circuit；
The A/D converter circuit is between the current acquisition control circuit and the controller, for by the electricity of analog quantity
Circulation is changed to the electric current of digital quantity.
Preferably, the current acquisition control circuit is optocoupler；
The both ends of the transmitting terminal of the optocoupler pass through capacitor and resistance respectively and connect with the power end of the motor, the optocoupler
One end of receiving end is grounded, and the other end of the receiving end of the optocoupler is connected in the controller.
Preferably, a kind of belt blows warning circuit, further includes:
Communicating circuit；
The communicating circuit is connect with the controller or the warning circuit；
The communicating circuit, for the alarm to be sent to terminal device.
Preferably, a kind of belt blows warning circuit, further includes:
Display circuit；
The display circuit is connect with the controller, for showing the electric current and/or the setting electric current.
Preferably, the controller is single-chip microcontroller, and the single-chip microcontroller has several input I/O ports and several output I/O ports；
The current detection circuit is connect with the input I/O port, and the warning circuit is connect with the output I/O port.
Second aspect, the present invention provide a kind of motor power-off control circuit, comprising:
A kind of such as above-mentioned belt blows warning circuit；And control circuit；
One end of the control circuit connects to power supply, and the other end of the control circuit is connected to motor；
The control circuit is also connect with the current detection circuit or the controller；
The output end of the current detection circuit or the controller by the control circuit control the motor with it is described
Power supply is disconnected or is not turned off.
Preferably, the control circuit is the first relay；
First relay, comprising: the first relay coil and the first relay normally closed contact；
One end ground connection of first relay coil connects 5V power supply, described in another termination of first relay coil
The output end of current detection circuit or the controller；
One end of first relay normally closed contact is connect with the power supply, one end of first relay normally closed contact with
The motor connection.
The third aspect, the present invention provide a kind of pumping unit, comprising:
A kind of such as above-mentioned belt blows warning circuit；
Or such as a kind of above-mentioned motor power-off control circuit；
The pumping unit has reduction gearbox；
The motor is connect by belt with the belt pulley of the reduction gearbox, for driving the pumping unit to move back and forth.
The present invention at least has the following beneficial effects:
The present invention provides a kind of belt and blows its pumping unit of warning circuit, motor power-off control circuit and application, to solve skin
After band is blown, discovery is burnt not in time reduces yield after belt oil pumping machine shuts down, and motor idle running causes the wave of electric energy
The problem of taking.
Detailed description of the invention
By the description below with reference to attached drawing to the embodiment of the present invention, the above and other purposes of the present invention, feature and
Advantage is apparent, in the accompanying drawings:
Fig. 1 is that a kind of belt of the embodiment of the present invention blows the circuit block diagram of warning circuit；
Fig. 2 is a kind of circuit block diagram of motor power-off control circuit of the embodiment of the present invention；
Fig. 3 is the circuit diagram that controller is connect with display circuit in Fig. 1 or Fig. 2 of the embodiment of the present invention；
Fig. 4 is the circuit theory that controller is connect with current detection circuit and communicating circuit in Fig. 1 or Fig. 2 of the embodiment of the present invention
Figure；
Fig. 5 is the circuit diagram of control circuit in Fig. 2 of the embodiment of the present invention；
Fig. 6 is the circuit diagram of communication control circuit in Fig. 2 of the embodiment of the present invention.
Specific embodiment
Below based on embodiment, present invention is described, but it is worth noting that, the present invention is not limited to these realities
Apply example.It is detailed to describe some specific detail sections below in datail description of the invention.However, for not detailed
The present invention can also be understood completely in the part described to the greatest extent, those skilled in the art.
In addition, it should be understood by one skilled in the art that provided attached drawing simply to illustrate that the purpose of the present invention,
Feature and advantage, attached drawing are not to be actually drawn to scale.
Meanwhile unless the context clearly requires otherwise, "include", "comprise" etc. otherwise throughout the specification and claims
Similar word should be construed as the meaning for including rather than exclusive or exhaustive meaning；That is, being " including but not limited to "
Meaning.
Fig. 1 is that a kind of belt of the embodiment of the present invention blows the circuit block diagram of warning circuit.As shown in Figure 1, a kind of belt
Blow warning circuit, comprising: controller；Controller is connect with current detection circuit 2, and controller is also connect with warning circuit 4；Electricity
Current detection circuit 2, for detecting the electric current for the motor connecting with belt；Controller, for being controlled according to electric current and setting electric current
Warning circuit 4 alarm or do not alarm.After warning circuit 4 is alarmed, staff hears that the alarm of warning circuit 4 can
The power supply connect is connected to the motor taking human as ground disconnection.To solve after belt blows, belt oil pumping machine stopping is burnt in discovery not in time
Reduce yield after operating, and the problem of motor idle running causes the waste of electric energy.
In Fig. 1, warning circuit 4 can be in voice alarm circuit, buzzer alarm circuit or sound light alarming circuit
One or several kinds.
In Fig. 1, if the electric current that current detection circuit 2 detects the motor connecting with belt is less than setting electric current, controller
Control warning circuit 4 is alarmed；It is set if the electric current that current detection circuit 2 detects the motor connecting with belt is more than or equal to
Constant current, controller control warning circuit 4 are not alarmed.Specifically, when current detection circuit 2 detects the motor connecting with belt
Electric current be less than setting electric current 50%, controller control warning circuit 4 alarm；If the detection of current detection circuit 2 and belt
The electric current of the motor of connection is more than or equal to the 50% of setting electric current, and controller control warning circuit 4 is not alarmed.
In Fig. 1, current detection circuit 2, comprising: current acquisition control circuit；One end of current acquisition control circuit with
The power end of motor connects, and the other end of current acquisition control circuit is connect with controller, for controlling whether controller acquires
Electric current.Such as, current acquisition control circuit is optocoupler；The both ends of the transmitting terminal of optocoupler pass through the electricity of capacitor and resistance and motor respectively
Source connection, one end ground connection of the receiving end of optocoupler, the other end of the receiving end of optocoupler are connected in controller.It can specifically be detailed in
Detailed description in Fig. 4.
In Fig. 1, current detection circuit 2, further includes: A/D converter circuit；A/D converter circuit is in current acquisition control circuit
Between controller, for the electric current of analog quantity to be converted to the electric current of digital quantity.It can specifically be detailed in Fig. 4 specifically
It is bright.
In Fig. 1, a kind of belt blows warning circuit, further includes: communicating circuit；Communicating circuit and controller or alarm electricity
Road 4 connects；Communicating circuit is sent to terminal device for that will alarm.Sending module in Fig. 4 can be specifically detailed in specifically
It is bright.Wherein, terminal device can be mobile phone, terminal server or terminal display or even cloud.With terminal device for hand
For machine, communicating circuit can be SIM card 5, and SIM card 5 will alarm and be sent to mobile phone in a manner of short message or dialing.
In Fig. 1, a kind of belt blows warning circuit, further includes: display circuit 3；Display circuit 3 is connect with controller,
For showing electric current and/or setting electric current.The detailed description that can be specifically detailed in Fig. 3.
The conventional controllers such as single-chip microcontroller or PLC may be selected in controller, and in Fig. 1, controller is single-chip microcontroller 1, single-chip microcontroller 1
With several input I/O ports and several output I/O ports；Current detection circuit 2 is connect with input I/O port, warning circuit 4 and output IO
Mouth connection.The detailed description that can be specifically detailed in Fig. 3 and Fig. 4.
Fig. 2 is a kind of circuit block diagram of motor power-off control circuit of the embodiment of the present invention.As shown in Fig. 2, a kind of motor
Power-off control circuit, comprising: as above a kind of belt blows warning circuit；And control circuit 6；One end of control circuit 6 and electricity
Source 7 connects, and the other end of control circuit 6 is connect with motor 8；Control circuit 6 also connects with current detection circuit 2 or controller
It connects；The output end of current detection circuit 2 or controller is by the control motor 8 of control circuit 6 and the disconnection of power supply 7 or constantly
It opens.
In Fig. 2, control circuit 6 is the first relay；First relay, comprising: the first relay coil and first after
Electric appliance normally closed contact；One end of first relay coil is grounded or connects 5V power supply, another termination electricity of the first relay coil
The output end of current detection circuit 2 or controller；One end of first relay normally closed contact is connect with power supply 7, the first relay
One end of normally closed contact is connect with motor 8.
The invention also provides a kind of pumping units, comprising: as above a kind of belt blows warning circuit；Or a kind of motor as above
Power-off control circuit；Pumping unit has reduction gearbox；Motor is connected by the belt pulley of belt and reduction gearbox, for driving pumping unit
It moves back and forth.
Combined with Figure 1 and Figure 2, to the detailed description of the invention: motor 8 may be selected three-phase motor or two-phase electric machine, and power supply 7 can be with
Select three phase mains or two-phase power supply.By taking motor 8 selects three-phase motor and power supply 7 selects three phase mains as an example, motor 8 passes through skin
Band is connect with the belt pulley of the reduction gearbox of pumping unit, and pumping unit is driven to move back and forth.Motor 8 passes through the first relay and three
The connection of phase power supply, motor current detecting circuit 2, for detecting the three-phase current of motor 8, single-chip microcontroller 1 will set three-phase current and
The three-phase current (that is, electric current in Fig. 1 and Fig. 2 description) that current detection circuit 2 detects sends display circuit 3, and display circuit 3 is right
The three-phase current that setting three-phase current and current detection circuit 2 detect is shown.Single-chip microcontroller 1 is also used to current detection circuit
The three-phase current of 2 detections is compared with setting three-phase current (that is, setting electric current in Fig. 1 and Fig. 2 description), if electric current is examined
The three-phase current that slowdown monitoring circuit 2 detects is less than the 50% of setting three-phase current, and single-chip microcontroller 1 controls warning circuit 4 and alarms.Also
It is to say, after belt burn-up, motor 8 and the reduction gearbox of pumping unit are disconnected, 8 idle running of motor, and the three of 8 idle running of motor
Phase current is less than the 50% of setting three-phase current, and single-chip microcontroller 1 controls warning circuit 4 and alarms, the output of current detection circuit 2
First relay coil power loss of the first relay of end control, the first relay normally closed contact of the first relay disconnect, three-phase
Power supply is disconnected with motor.Warning circuit 4, further includes: SIM card 5, when warning circuit 4 is alarmed, 4 SIM of warning circuit
Alarm signal is sent on specified mobile phone by card 5.Wherein, setting three-phase current is set according to power of motor size, setting three
The range 5-200A of phase current, maximum motor can be with 90KW.
Fig. 3 is the circuit diagram that controller is connect with display circuit in Fig. 1 or Fig. 2 of the embodiment of the present invention.Such as Fig. 3 institute
Show, by taking controller selects single-chip microcontroller 1 as an example, single-chip microcontroller 1 is the CPU1 in Fig. 3, and CPU1 can choose the monolithic of 89C5X type
Machine, such as: 40 pin of power end of 89C51, CPU1 are connect with power supply VCC(5V), the 33-40 pin of CPU1 and the first pull-up electricity
Integrated base P1 connection is hindered, the 29-31 pin of CPU1 is connect with the second pull-up resistor integrated base P2, integrated with the first pull-up resistor
The resistance value of seat P1 and the resistance value pull-up resistor of the second pull-up resistor integrated base P2 connection can be respectively 1K；The 9 of the end RST of CPU1
Pin passes through the 5th capacitor C5(10V, 10 μ F) it is connect with power supply VCC(5V), between 9 pins at the 5th end capacitor C5 and RST also
Pass through the 9th resistance R9(10K) ground connection GND.20 pins of 19 pins of the XTAL1 of CPU1 and XTAL2 respectively with crystal oscillator Y
The both ends of (12M) connect, crystal oscillator Y(12M) both ends also pass through third capacitor C3(30pF respectively) and the 4th capacitor C4(30pF)
It is grounded GND.20 pins of CPU1 are grounded GND.The 1-6 pin of CPU1 P1.0-P1.6 is respectively defined as P10-P16.2 numbers
One end of pipe DP connect (9 pin floating of the upside charactron in Fig. 3), 2 charactron DP with the 35-40 pin of CPU1 respectively
The other end connect respectively with 38-34 pin.
Fig. 4 is the circuit that controller is connect with current detection circuit and communicating circuit in Fig. 1 or Fig. 2 of the embodiment of the present invention
Schematic diagram.As shown in figure 4, the 2-7 pin of key terminal base P10 respectively with the 1-6 pin (P10-P16) of CPU1 P1.0-P1.6
Connection, 1 pin of key terminal base P10 are grounded GND, and key is used to be arranged the setting electric current of CPU1.In Fig. 1 and Fig. 2 description
Current acquisition control circuit is optocoupler U1, has 3 optocoupler U1 in Fig. 4, the transmitting terminal of 3 optocoupler U1 passes through capacitor and resistance respectively
It is connect with power end phase A, phase B and the phase C of motor；Specifically, the transmitting terminal of first optocoupler U1 passes through the 17th electricity respectively
Hold the power end phase A connection of (30pF) and 10K resistance and motor, the transmitting terminal of second optocoupler U1 passes through the 15th capacitor respectively
The power end phase B connection of (30pF) and 10K resistance and motor, the transmitting terminal of third optocoupler U1 pass through respectively 30pF capacitor and
The power end phase C connection of 10K resistance and motor.One end of the receiving end of first optocoupler is grounded, the modulus of current detection circuit 2
3 feet of conversion module LM324 are connect by resistance R101 (10K) with the other end of first receiving end optocoupler U1；Second light
One end of the receiving end of coupling is grounded, and 5 foot of input terminal of the analog-to-digital conversion module LM324 of current detection circuit 2 passes through resistance R102
(10K) is connect with the other end of second receiving end optocoupler U1；One end of the receiving end of third optocoupler is grounded, current detecting electricity
9 foot of input terminal of the analog-to-digital conversion module LM324 on road 2 is another by resistance R103 (10K) and the receiving end third optocoupler U1
End connection；13 foot of input terminal of analog-to-digital conversion module LM324 is grounded GND, and 2 feet of analog-to-digital conversion module LM324 meet power supply VCC,
23,22 and 21 pins of resistance and CPU1 that 4,6,8 foot of output end of analog-to-digital conversion module LM324 passes through 10K respectively connect.
The resistance of 10K and 23, the 22 and 21 pin connecting lines of CPU1 also pass through the capacity earth GND of 30pF respectively.The 25-27 of CPU1 draws
The first pin, second pin and the third of foot and transmitting module (that is, communicating circuit or SIM card 5 in Fig. 1 and Fig. 2 description) are drawn
Foot connection, transmitting module can select the transmitting module of Bao Fan embedded electronic engineering company model GSM-BF01.Emit mould
4th pin of block also with R12(470 ohm of R11(470 ohm of power supply VCC and 11 resistance) and 12 resistance) and transmitting module
The 5th pin connection, between the 4th pin of transmitting module and the 6th pin have the 7th capacitor C7(30pF), transmitting module
The 6th pin be grounded GND.
Fig. 5 is the circuit diagram of control circuit in Fig. 2 of the embodiment of the present invention.As shown in figure 5, with the CPU1 of Fig. 3 and Fig. 4
It is illustrated, the first relay, comprising: the first relay coil K1 and the first relay normally closed contact；First relay coil
One end of K1 is grounded GND, the output end (7 foot) of another termination CPU1 of the first relay coil K1；First relay is normally closed to be connect
One end of point k1-2 and k1-12 in power supply 7(Fig. 2) connect, one end of the first relay normally closed contact k1-2 and k1-12 and electricity
In machine 8(Fig. 2) connection.Specifically, the both ends of the first relay coil K1 and it is connected to third diode D3, third diode D3
Plus earth GND, CPU1 7 feet pass through R10(470 ohm of the tenth resistance) connect with the base stage of the first triode Q1, first
The emitter of triode Q1 is connect with power supply VCC, and the collector of the first triode Q1 and the anode of third diode D3 connect together
To the other end of the first relay coil K1.Its working principle is that CPU1 7 foot of output end output high level (5V or
3.3V), the first triode Q1 is connected, and the first relay coil K1 electrification, the first relay normally closed contact will be in power supply 7(Fig. 2)
With in power supply 7(Fig. 2) disconnect.
In Fig. 5, more specifically, when warning circuit 4 is alarmed, 7 foot of output end of CPU1 exports high level
(5V or 3.3V), the first triode Q1 conducting, the first relay coil K1 electrification, the first relay normally closed contact is by power supply 7
(in Fig. 2) and in power supply 7(Fig. 2) disconnect.
Fig. 6 is the circuit diagram of communication control circuit in Fig. 2 of the embodiment of the present invention.As shown in fig. 6, the CPU1 in Fig. 4
There is the second relay, the second relay, comprising: the second relay coil K2 and the second relay are normally closed between transmitting module
Contact；One end of second relay coil K2 is grounded GND, the output end (8 of another termination CPU1 of the second relay coil K2
Foot)；One end of second relay normally closed contact is connect with transmitting module (in Fig. 4), the second relay normally closed contact k1-2 and k1-
12 one end in motor 8(Fig. 2) connect.Specifically, the both ends of the second relay coil K2 and it is connected to the 7th diode D7,
8 feet of the plus earth GND of 7th diode D7, CPU1 pass through R21(470 ohm of the 21st resistance) and third transistor Q3
Base stage connection, the emitter of third transistor Q3 connect with power supply VCC, the collector of third transistor Q3 and the seven or two pole
The anode of pipe D7 is connected to the other end of the second relay coil K2 together.Its working principle is that 8 foot of output end of CPU1 exports height
Level (5V or 3.3V), third transistor Q3 conducting, the second relay coil K2 electrification, the second relay normally closed contact is to hair
It penetrates module and sends trigger signal.
In Fig. 6, more specifically, when warning circuit 4 is alarmed, 8 foot of output end of CPU1 exports high level
(5V or 3.3V), third transistor Q3 conducting, the second relay coil K2 electrification, the second relay normally closed contact to transmitting mould
Block sends trigger signal, and alarm is sent to terminal device by transmitting module.
Embodiment described above is only to express embodiments of the present invention, and the description thereof is more specific and detailed, but can not
Therefore limitations on the scope of the patent of the present invention are interpreted as.It should be pointed out that those skilled in the art,
Under the premise of not departing from present inventive concept, several deformations, same replacement can also be made, improved etc., these belong to the present invention
Protection scope.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of belt blows warning circuit characterized by comprising
Controller；
The controller is connect with current detection circuit (2), and the controller is also connect with warning circuit (4)；
The current detection circuit (2), for detecting the electric current for the motor connecting with the belt；
The controller, for alarm according to the electric current and the setting electric current control warning circuit (4) or not report
It is alert.
2. a kind of belt blows warning circuit according to claim 1, it is characterised in that:
The current detection circuit (2), comprising: current acquisition control circuit；
One end of the current acquisition control circuit is connect with the power end of the motor, the current acquisition control circuit it is another
One end is connect with the controller, for controlling whether the controller acquires the electric current.
3. a kind of belt blows warning circuit according to claim 2, it is characterised in that:
The current detection circuit (2), further includes: A/D converter circuit；
The A/D converter circuit is between the current acquisition control circuit and the controller, for by the electricity of analog quantity
Circulation is changed to the electric current of digital quantity.
4. a kind of belt blows warning circuit according to claim 2, it is characterised in that:
The current acquisition control circuit is optocoupler；
The both ends of the transmitting terminal of the optocoupler pass through capacitor and resistance respectively and connect with the power end of the motor, the optocoupler
One end of receiving end is grounded, and the other end of the receiving end of the optocoupler is connected in the controller.
5. a kind of any one of -4 belts blow warning circuit according to claim 1, which is characterized in that further include:
Communicating circuit；
The communicating circuit is connect with the controller or the warning circuit (4)；
The communicating circuit, for the alarm to be sent to terminal device.
6. a kind of any one of -4 belts blow warning circuit according to claim 1, which is characterized in that further include:
Display circuit (3)；
The display circuit (3) connect with the controller, for showing the electric current and/or the setting electric current.
7. a kind of any one of -4 belts blow warning circuit according to claim 1, it is characterised in that:
The controller is single-chip microcontroller (1), and the single-chip microcontroller (1) has several input I/O ports and several output I/O ports；
The current detection circuit (2) connect with the input I/O port, and the warning circuit (4) connect with the output I/O port.
8. a kind of motor power-off control circuit characterized by comprising
A kind of belt as described in claim any one of 1-7 blows warning circuit；And control circuit (6)；
One end of the control circuit (6) is connect with power supply (7), and the other end of the control circuit (6) is connect with motor (8)；
The control circuit (6), also connect with the current detection circuit (2) or the controller；
The output end of the current detection circuit (2) or the controller controls the motor by the control circuit (6)
(8) it disconnects or does not turn off with the power supply (7).
9. a kind of motor power-off control circuit according to claim 8, it is characterised in that:
The control circuit (6) is the first relay；
First relay, comprising: the first relay coil and the first relay normally closed contact；
One end ground connection of first relay coil connects 5V power supply, described in another termination of first relay coil
The output end of current detection circuit (2) or the controller；
One end of first relay normally closed contact is connect with the power supply (7), and the one of first relay normally closed contact
End is connect with the motor (8).
10. a kind of pumping unit characterized by comprising
A kind of belt as described in claim any one of 1-7 blows warning circuit；
Or a kind of motor power-off control circuit as described in claim 8 or 9；
The pumping unit has reduction gearbox；
The motor is connect by belt with the belt pulley of the reduction gearbox, for driving the pumping unit to move back and forth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910143834.0A CN109994996A (en) | 2019-02-27 | 2019-02-27 | Belt blows warning circuit, motor power-off control circuit and the pumping unit using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910143834.0A CN109994996A (en) | 2019-02-27 | 2019-02-27 | Belt blows warning circuit, motor power-off control circuit and the pumping unit using it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109994996A true CN109994996A (en) | 2019-07-09 |
Family
ID=67130439
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910143834.0A Pending CN109994996A (en) | 2019-02-27 | 2019-02-27 | Belt blows warning circuit, motor power-off control circuit and the pumping unit using it |
Country Status (1)
| Country | Link |
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| CN (1) | CN109994996A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112564550A (en) * | 2020-12-15 | 2021-03-26 | 贵州航天凯山石油仪器有限公司 | Intelligent starting and stopping device and method for oil well motor |
| CN114583660A (en) * | 2021-12-07 | 2022-06-03 | 江苏金智科技股份有限公司 | Motor relay protection device and method for belt conveyor scratch fault protection |
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| 张桂红: "《单片机基础及应用》", 30 September 2017 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112564550A (en) * | 2020-12-15 | 2021-03-26 | 贵州航天凯山石油仪器有限公司 | Intelligent starting and stopping device and method for oil well motor |
| CN114583660A (en) * | 2021-12-07 | 2022-06-03 | 江苏金智科技股份有限公司 | Motor relay protection device and method for belt conveyor scratch fault protection |
| CN114583660B (en) * | 2021-12-07 | 2023-12-26 | 江苏金智科技股份有限公司 | Motor relay protection device and method for belt conveyor scratch fault protection |
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Application publication date: 20190709 |