CN212615207U - Electric pre-oil supply pump - Google Patents
Electric pre-oil supply pump Download PDFInfo
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- CN212615207U CN212615207U CN202021234612.4U CN202021234612U CN212615207U CN 212615207 U CN212615207 U CN 212615207U CN 202021234612 U CN202021234612 U CN 202021234612U CN 212615207 U CN212615207 U CN 212615207U
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Abstract
The utility model discloses an electronic fuel feed pump in advance relates to the electric oil pump field, including 380V alternating current power supply, 24V DC power supply, dc-to-ac converter and power switching unit, wherein the dc-to-ac converter becomes 380V alternating current power supply with 24V DC power supply, wherein power switching unit's input is connected with 380V alternating current power supply and 24V DC power supply electricity respectively, power switching unit's output and electronic fuel feed pump electricity in advance are connected, power switching unit action, with 380V alternating current power supply with electronic fuel feed pump electricity in advance be connected, or with 24V DC power supply and electronic fuel feed pump electricity in advance. It can be seen that, the utility model discloses an electronic fuel feed pump in advance has dual power, and it passes through the nimble power that disposes of power switching unit, can reliably move for a long time, has improved the commonality, has solved the unable normal long-time permission that single power leads to, the unable widely used drawback.
Description
Technical Field
The utility model relates to an electric oil pump technical field especially relates to an electronic fuel feed pump in advance.
Background
The engine with a large cylinder diameter needs to be pre-supplied with lubricating oil before starting, and when the electric pre-oil supply pump only adopts a single power supply for supplying power, the electric pre-oil supply pump cannot run due to power failure, so that the starting risk of the engine is influenced. The traditional electric pre-oil supply pump only has a single power supply, such as a DC24V direct current power supply or an AC380V alternating current power supply, and the risk that the traditional electric pre-oil supply pump cannot work normally due to power failure is high; the electric pre-oil supply pump of the AC380V power supply can normally work only by accessing commercial power, and the application field of the electric pre-oil supply pump is limited; the electric pre-oil supply pump of the DC24V power supply can be flexibly matched with a storage battery for supplying power, but the direct current motor is easy to heat and cannot work for a long time due to low direct current voltage.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned not enough, the utility model discloses the technical problem that will solve is: the electric pre-oil supply pump with the double power supplies is provided, the power supply is flexibly configured through the power supply switching unit, long-time operation can be guaranteed, and the universality is improved.
In order to solve the technical problem, the technical scheme of the utility model is that:
an electric pre-oil supply pump comprises a 380V alternating current power supply, a 24V direct current power supply and an inverter electrically connected with the 24V direct current power supply, wherein the inverter converts the 24V direct current power supply into the 380V alternating current power supply; still include power switching unit, power switching unit's input respectively with 380V alternating current power supply with 24V DC power supply electricity is connected, power switching unit's output with electronic fuel feed pump electricity is connected in advance, power switching unit action will 380V alternating current power supply with electronic fuel feed pump electricity is connected in advance, or will 24V DC power supply with electronic fuel feed pump electricity is connected in advance.
Preferably, the power switching unit comprises a power switching switch and a first alternating current contactor which are electrically connected, a normally closed contact of the first alternating current contactor is electrically connected with the 380V alternating current power supply, a normally open contact of the first alternating current contactor is electrically connected with the 24V direct current power supply, and an output end of the first alternating current contactor is electrically connected with the electric pre-oil supply pump; and operating the power supply change-over switch to trigger the first alternating current contactor to act to change over the power supply.
The preferred mode is, still include the junction box, be provided with the power supply unit and the main control unit of electricity connection on the junction box.
Preferably, the junction box is further provided with a start-stop control unit for controlling the start and stop of the electric pre-oil supply pump, the start-stop control unit comprises a second alternating current contactor electrically connected with the electric pre-oil supply pump and a control circuit, the control circuit is electrically connected with the power supply unit, and the control circuit triggers the second alternating current contactor to act so as to control the start or stop of the electric pre-oil supply pump.
Preferably, the control loop comprises an automatic control loop, a manual control loop, a remote control loop and a mode selector switch electrically connected with the automatic control loop, the manual control loop and the remote control loop respectively, and the mode selector switch is electrically connected with the power supply unit; and the mode selector switch acts to conduct the automatic control circuit and the second alternating current contactor, conduct the manual control circuit and the second alternating current contactor or conduct the remote control circuit and the second alternating current contactor.
Preferably, the remote control loop comprises a remote control switch, the remote control switch is connected in series between the mode selector switch and the second ac contactor, the mode selector switch is operated to turn on or off the power supply unit and the remote control switch, and the remote control switch is electrically connected with the remote control terminal, so that the remote control terminal remotely controls the start and stop of the electric pre-oil supply pump.
Preferably, the automatic control circuit includes a first relay, the first relay is connected in series between the mode switch and the second ac contactor, and the mode switch operates to turn on or off the power supply unit and the first relay; the junction box is also provided with a first timing unit, a second timing unit and an oil pressure sensor which are electrically connected with the main control unit, the first timing unit counts time and transmits corresponding electric signals to the main control unit, and the main control unit controls the second alternating current contactor to start the electric pre-oil supply pump and start the second timing unit to time; the second timing unit counts time and transmits a corresponding electric signal to the main control unit, the main control unit triggers the second alternating current contactor to stop the electric pre-oil supply pump, or the oil pressure sensor collects real-time oil pressure of a main oil duct and transmits a corresponding electric signal to the main control unit, the main control unit compares the real-time oil pressure with a preset value and controls the second alternating current contactor to stop the electric pre-oil supply pump according to a comparison result; the manual control loop comprises a start switch and a stop switch which are arranged in parallel, the start switch and the stop switch are respectively connected between the mode change-over switch and the second alternating current contactor in series, and the mode change-over switch acts to turn on or off the power supply unit and the start switch and simultaneously turn on or off the power supply unit and the stop switch; operating the starting switch to close the normally open contact of the second alternating current contactor and start the electric pre-oil supply pump; and operating the stop switch to disconnect the normally open contact of the second alternating current contactor and stop the electric pre-oil supply pump.
Preferably, a power monitoring unit, a direct-current power indicator, a direct-current voltage reduction indicator and an alternating-current power indicator are further arranged on the junction box, the power monitoring unit is electrically connected with the main control unit, the 24V direct-current power supply and the 380V alternating-current power supply respectively, and the direct-current power indicator and the alternating-current power indicator are electrically connected with the first alternating-current contactor respectively; the power monitoring unit transmits a state electric signal corresponding to the power state to the main control unit, the main control unit controls the direct-current voltage low indicator lamp to be on or off according to the state electric signal, and the first alternating-current contactor controls the direct-current power indicator lamp or the alternating-current power indicator lamp to be on or off.
Preferably, the power supply unit includes a transformer and a rectifier circuit, a primary side of the transformer is electrically connected to the second ac contactor, a secondary side of the transformer is electrically connected to the rectifier circuit, the rectifier circuit outputs a dc voltage, and an emergency stop switch is provided at an output end of the rectifier circuit.
Preferably, the junction box is further provided with: the overload monitoring unit is used for detecting whether the electric pre-oil supply pump is overloaded or not and transmitting a corresponding overload electric signal to the overload indicator lamp and the second relay so as to control the overload indicator lamp to be turned on and off and control the second relay to output an overload alarm signal, and the overload detecting unit is also electrically connected with the power supply unit; an operation indicator light electrically connected with the second AC contactor; and/or an alarm unit electrically connected with the main control unit.
After the technical scheme is adopted, the beneficial effects of the utility model are that:
because the utility model discloses an electronic fuel feed pump in advance, including 380V alternating current power supply, 24V DC power supply, inverter and power switching unit, wherein the inverter becomes 380V alternating current power supply with 24V DC power supply, come for electronic fuel feed pump power supply in advance, wherein power switching unit's input is connected with 380V AC power supply and 24V DC power supply electricity respectively, power switching unit's output and electronic fuel feed pump electricity in advance are connected, power switching unit moves, with 380V AC power supply and electronic fuel feed pump electricity in advance, or with 24V DC power supply and electronic fuel feed pump electricity in advance. It can be seen that, the utility model discloses an electronic fuel feed pump in advance has the dual supply, and its accessible power supply switching unit disposes the power in a flexible way, guarantees reliable long-time operation, has improved the commonality, has solved the unable normal long-time permission that single power leads to, the unable widely used drawback.
The power supply switching unit comprises a mode switching switch and a first alternating current contactor which are electrically connected, a normally closed contact of the first alternating current contactor is electrically connected with a 380V alternating current power supply, a normally open contact of the first alternating current contactor is electrically connected with a 24V direct current power supply, and an output end of the first alternating current contactor is electrically connected with the electric pre-oil supply pump; the power supply change-over switch is operated to trigger the first alternating current contactor to act to change over the power supply, and the operation is simple and convenient.
Owing to still include the junction box, be provided with the power supply unit and the main control unit of electricity connection on this junction box, make the utility model provides high intelligent degree.
The control loop comprises an automatic control loop, a manual control loop, a remote control loop and a mode selector switch which is respectively and electrically connected with the automatic control loop, the manual control loop and the remote control loop, and the mode selector switch is electrically connected with the power supply unit; wherein the mode change over switch action, switch on automatic control return circuit and second ac contactor, switch on manual control return circuit and second ac contactor, or switch on remote control return circuit and ac contactor, make the utility model discloses electric pre-oil feed pump opens and stops control mode diversified to introduce remote control mode, satisfied multiple user demand.
The power supply unit comprises a transformer and a rectifying circuit, the primary side of the transformer is electrically connected with the second alternating current contactor, the secondary side of the transformer is electrically connected with the rectifying circuit, the rectifying circuit outputs direct current voltage, and the output end of the rectifying circuit is provided with an emergency stop switch, so that the power of the junction box is converted from the power supply of the electric pre-oil supply pump without additionally arranging a power supply.
Drawings
FIG. 1 is a schematic structural view of an electric pre-feeding pump of the utility model;
FIG. 2 is a schematic block diagram of an electric pre-oil supply pump of the present invention;
FIG. 3 is a circuit diagram of the electric pre-oil supply pump of the utility model;
in the figure: 1-an oil pump, 2-a coupler, 3-an alternating current motor, 4-a base, 5-a junction box, 6-a display unit, 7-a control panel, 80-an alternating current power indicator, 81-a direct current power indicator, 82-an operation indicator, 83-a direct current voltage low indicator, 84-an overload indicator, 90-a starting switch, 91-a stopping switch, 92-a mode selector switch, 93-a power selector switch, 94-an emergency stop switch, 95-a power switch, 10-an inverter, 11-a buzzer, 12-a power unit, 13-24V direct current power, 14-380V alternating current power and an M-electric pre-oil supply pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, 2 and 3, an electric pre-oil supply pump comprises an oil pump 1 fixed on a base 4, wherein the oil pump 1 is connected with an alternating current motor 2 through a coupling 2; the system comprises a 380V alternating current power supply 14, a 24V direct current power supply 13 and an inverter 10 electrically connected with the 24V direct current power supply 13, wherein the inverter 10 converts the 24V direct current power supply 13 into the 380V alternating current power supply 14 to supply power to an electric pre-oil supply pump M; the electric pre-oil supply system further comprises a power supply switching unit, wherein the input end of the power supply switching unit is respectively and electrically connected with a 380V alternating current power supply 14 and a 24V direct current power supply 13, the output end of the power supply switching unit is electrically connected with an electric pre-oil supply pump M, the power supply switching unit acts to electrically connect the 380V alternating current power supply 14 with the electric pre-oil supply pump M, or electrically connect the 24V direct current power supply 13 with the electric pre-oil supply pump M. The utility model discloses an electronic fuel feed pump in advance has the dual supply, and it can dispose the power in a flexible way through the power switching unit, guarantees reliable long-time operation, has improved the commonality, has solved the unable normal long-time permission that leads to of single power, the unable widely used drawback.
As shown in fig. 1, the utility model discloses still include junction box 5, junction box 5 passes through the support mounting on base 4 of electronic fuel pre-feed pump M. A power supply unit 12 and a main control unit which are electrically connected are arranged in the junction box 5, a control panel 7 is arranged on the outer side of the junction box 5, and an indicating lamp group and a switch group are arranged on the control panel 7. The main control unit can be but is not limited to a single chip microcomputer.
As shown in fig. 1, 2 and 3, the power switching unit includes a power switching switch 93 and a first ac contactor KM1 electrically connected, a normally closed contact KM1-1 of the first ac contactor KM1 is electrically connected to a 380V ac power supply 14, a normally open contact KM1-2 of the first ac contactor KM1 is electrically connected to a 24V dc power supply 13, and an output end of the first ac contactor KM1 is electrically connected to the electric pre-oil supply pump M; the power supply switch 93 is operated to trigger the first ac contactor KM1 to switch the power supply.
The power supply switch 93 is disposed on the control panel 7 of the junction box 5, the power supply switch 93 may be, but not limited to, a bidirectional switch, and the rotating power supply switch 93 triggers the first ac contactor KM1 to operate the first ac contactor KM1, so as to put the 380V ac power supply 14 or the 24V dc power supply 13 into use.
In addition, the power supply switching unit is not limited to the above-mentioned one, and the power supply switching may be automatically controlled by the main control unit in the junction box 5. Such as: set up the normally closed contact of fourth relay K4 between power supply change over switch 93 and electrical unit 12, concatenate the normally open contact of fourth relay K4 and the normally open contact of fifth relay K5 between first ac contactor KM1 and electrical unit 12, when moving to the automatic control return circuit, the main control unit is through the normally closed contact disconnection of control fourth relay K4, short circuit power supply change over switch 93, make power supply change over switch 93 not put into use, the normally open contact of control fifth relay K5 is closed, make the main control unit be connected with first ac contactor KM1 electricity, realize power automatic switch-over through control first ac contactor KM 1.
As shown in fig. 3, the power supply unit 12 includes a transformer and a rectifier circuit, the primary side of the transformer is electrically connected to a second ac contactor KM2 (the second ac contactor is a main switch of the electric pre-feeding pump power supply, and the second ac contactor is electrically connected to the output terminal of the first ac contactor KM 1), the secondary side of the transformer is electrically connected to the rectifier circuit, the rectifier circuit outputs a dc voltage to supply power to each unit, indicator lamp, relay, and each switch in the junction box 5, and an emergency stop switch 94 is provided at the output terminal of the rectifier circuit, the emergency stop switch 94 is provided on the control panel 7, and the emergency stop switch 94 is pressed to disconnect the output of the power supply unit 12, thereby powering off each unit, indicator lamp, relay, each switch, and the like in the junction box 5. In this example, in order to improve the power supply safety, the output end of the rectifier circuit is provided with a fuse FU2, and the primary side ends of the transformer are provided with fuses FU1, respectively.
As shown in fig. 1, 2 and 3, the junction box 5 is further provided with a power monitoring unit, a dc power indicator 81, a dc voltage low indicator 83 and an ac power indicator 80, wherein the power monitoring unit is electrically connected with the main control unit, the 24V dc power supply 13 and the 380V ac power supply 14 respectively to acquire a power state; direct current power supply pilot lamp 81 and alternating current power supply pilot lamp 80 are the electric connection of first alternating current contactor KM1 electricity respectively, the power monitoring unit transmits the state signal of telecommunication that the power state corresponds and gives the main control unit, the main control unit is according to the bright income of state signal control direct current voltage pilot lamp 83 and is gone out, first alternating current contactor KM1 switch-on 24V direct current power supply 13, then the bright alternating current power supply pilot lamp 80 of direct current power supply pilot lamp 81 goes out, first alternating current contactor KM1 switch-on 380V alternating current power supply 14, then alternating current power supply pilot lamp 81 goes out alternating current power supply pilot lamp 80 and lights.
The dc power indicator 81, the dc voltage reduction indicator 83, and the ac power indicator 80 are provided on the control panel 7, and when the first ac contactor KM1 operates, the dc power indicator 81 or the ac power indicator 80 is turned on to indicate the use of the 24V dc power 13 or the 380V ac power. In this example, the main control unit is electrically connected to the dc voltage low indicator lamp 83 through a third relay K3, and the third relay K3 is connected in series between the output end of the rectifying circuit and the dc voltage low indicator lamp 83. The power supply monitoring unit is electrically connected with a positive electrode V + and a negative electrode V-of the 24V direct current power supply 13 to obtain the output voltage of the 24V direct current power supply 13, when the voltage is lower than a preset value, the main control unit triggers the third relay K3 to be closed, the direct current voltage low indicator lamp 83 is electrified and emits light, and the low voltage condition of the direct current power supply is indicated.
As shown in fig. 1, 2 and 3, the junction box 5 is further provided with an overload monitoring unit, and an overload indicator lamp 84 and a second relay K2 electrically connected to the overload detecting unit, wherein the overload monitoring unit is configured to detect whether the electric pre-oil supply pump M is overloaded and transmit corresponding overload electrical signals to the overload indicator lamp 84 and the second relay K2, so as to control the overload indicator lamp 84 to be turned on and off, so as to control the second relay K2 to output an overload alarm signal, and the overload detecting unit is further electrically connected to the power supply unit 12, so as to cut off the output of the power supply unit 12 when the overload occurs; an operation indicator lamp 82 electrically connected with a normally open contact KM2-1 of the second AC contactor KM 2; and/or the junction box 5 is also provided with an alarm unit electrically connected with the main control unit.
When the electric pre-oil supply pump M is overloaded, the line current is increased, the heat is increased, the normally open contact of the thermal relay FR is triggered to act, the thermal relay FR powers off the electric pre-oil supply pump M, meanwhile, the normally open contact FR-1 of the thermal relay is connected between the power supply unit 12 and the overload indicator lamp 84 in series, and when the thermal relay FR acts, the normally open contact FR-1 is closed, so that the overload indicator lamp 84 is powered on to emit light, and an overload prompt is sent; meanwhile, the second relay K2 acts to output an overload alarm signal; the connection box 5 is provided with a connection terminal in this example, and the second relay K2 outputs an alarm signal through the connection terminal. In addition, the normally closed contact FR-2 of the thermal relay in this embodiment is connected in series between the emergency stop switch 94 and the power switch 95, and when the thermal relay is overloaded, the thermal relay FR disconnects the power supply to realize overload protection.
The normally open contact of the second alternating current contactor KM2 is connected in series between the output end of the rectifying circuit and the operation indicator lamp 82, when the normally closed contact of the second alternating current contactor KM2 is closed, the electric pre-oil supply pump M is powered on to operate, and the operation indicator lamp 82 is powered on to emit light to indicate the operation state of the electric pre-oil supply pump M.
The alarm unit comprises a buzzer 11, and under the condition of any fault, the main control unit can control the buzzer 11 to make a sound to prompt a user. Of course, the alarm unit is not limited to the above-mentioned buzzer 11, and may include a blinking indicator lamp or the like.
As shown in fig. 1, 2 and 3, a start-stop control unit for controlling start and stop of the electric pre-oil supply pump M is arranged on the junction box 5, the start-stop control unit includes a second ac contactor KM2 electrically connected with the electric pre-oil supply pump M and a control circuit, the control circuit is electrically connected with the power supply unit 12, and the control circuit triggers the second ac contactor KM2 to act so as to control the start or stop of the electric pre-oil supply pump M. The control loop comprises an automatic control loop, a manual control loop, a remote control loop and a mode selector switch 92 which is respectively electrically connected with the automatic control loop, the manual control loop and the remote control loop, the mode selector switch 92 is electrically connected with the power supply unit 12, the mode selector switch 92 is arranged on the control panel 7, in the embodiment, a power supply switch 95 is also connected in series between the mode selector switch 92 and the output end of the rectifying circuit, the power supply safety is further improved, the mode selector switch 92 comprises a static contact and three dynamic contacts, the static contact is in contact conduction with any dynamic contact, and the control loop connected with the dynamic contact is conducted; when the power switch 95 is in the closed state, the mode selector switch 92 is operated to connect the automatic control circuit and the second ac contactor KM2, to connect the manual control circuit and the second ac contactor KM2, or to connect the remote control circuit and the ac contactor.
As shown in fig. 3, the remote control loop includes a remote control switch SB, the remote control switch SB is connected in series between the mode switching switch 92 and the second ac contactor KM2, the mode switching switch 92 acts to turn on or off the power supply unit 12 and the remote control switch SB, and the remote control switch SB is electrically connected to the remote control terminal, so that the remote control terminal remotely controls the start and stop of the electric pre-oil supply pump. The remote switch SB in this example may be a normally open contact of a relay controlled by a remote control terminal. For example, after the mode switch 92 turns on the remote switch SB and the power supply unit 12, the remote control terminal controls the remote switch SB to be closed, and triggers the second ac contactor KM2 to start the electric pre-oil supply pump M, or controls the remote switch SB to be opened, and triggers the second ac contactor KM2 to stop the electric pre-oil supply pump M.
As shown in fig. 3, the automatic control circuit includes a first relay K1, the first relay K1 is connected in series between the mode switch 92 and the second ac contactor KM2, and the mode switch 92 operates to turn on or off the power supply unit 12 and the first relay K1; the junction box 5 is further provided with a first timing unit, a second timing unit and an oil pressure sensor which are electrically connected with the main control unit, wherein the timing time of the first timing unit can be set to be but not limited to 1 hour, namely, the electric pre-oil supply pump is started once every 1 hour, and the timing time of the second timing unit can be set to be but not limited to 5 minutes. When the first timing unit times, corresponding electric signals are transmitted to the main control unit, the main control unit controls the second alternating current contactor KM2 to start the electric pre-oil supply pump M, and the second timing unit is started to time; the second timing unit times, transmits a corresponding electric signal to the main control unit, the main control unit triggers the second alternating current contactor KM2 to stop the electric pre-oil supply pump M, or the oil pressure sensor collects the real-time oil pressure of the main oil duct and transmits a corresponding electric signal to the main control unit, the main control unit compares the real-time oil pressure with a preset value, and controls the second alternating current contactor KM2 to stop the electric pre-oil supply pump M according to a comparison result, namely the running time of the electric pre-oil supply pump M is not yet 5 minutes, but the oil pressure of the main oil duct reaches a preset value, the electric pre-oil supply pump M is stopped.
As shown in fig. 3, the manual control circuit includes a start switch 90 and a stop switch 91 which are arranged in parallel, the start switch 90 and the stop switch 91 are respectively connected in series between a mode switching switch 92 and a second ac contactor KM2, the mode switching switch 92 acts to turn on or off the power supply unit 12 and the start switch 90, and the mode switching switch 92 turns on or off the power supply unit 12 and the stop switch 91; the starting switch 90 is operated to close the normally open contact of the second alternating current contactor KM2, and the electric pre-oil supply pump M is started; the stop switch 91 is operated to open the normally open contact of the second ac contactor KM2, and the electric pre-oil supply pump M is stopped. The start switch 90 and the stop switch 91 are arranged on the control panel 7, and after the start switch 90 or the stop switch 91 is pressed, the second alternating current contactor KM2 is directly triggered to directly start or stop the electric pre-oil supply pump M.
To sum up, the utility model has two power supplies, and can still operate when one power supply fails, so that the operation guarantee capability of the electric pre-oil supply pump is far greater than that of a single-power pre-oil supply pump; the system is driven by the alternating current motor, can run for a long time in a direct current power supply mode, overcomes the defect that a pre-oil supply pump driven by a storage battery cannot work for a long time, and is very suitable for being matched with an engine which does not have a commercial power area and needs to pre-supply lubricating oil for a long time; the intelligent degree is improved, wireless remote control, automatic control and manual control modes are provided, various use requirements are met, and the intelligent control system has good universality.
The above-mentioned preferred embodiments of the present invention are not intended to limit the present invention, and any modifications made within the spirit and principles of the present invention, equivalent to the improvement of an electric pre-oil pump, should be included within the scope of the present invention.
Claims (10)
1. An electric pre-oil supply pump is characterized by comprising a 380V alternating current power supply, a 24V direct current power supply and an inverter electrically connected with the 24V direct current power supply, wherein the inverter converts the 24V direct current power supply into the 380V alternating current power supply;
still include power switching unit, power switching unit's input respectively with 380V alternating current power supply with 24V DC power supply electricity is connected, power switching unit's output with electronic fuel feed pump electricity is connected in advance, power switching unit action will 380V alternating current power supply with electronic fuel feed pump electricity is connected in advance, or will 24V DC power supply with electronic fuel feed pump electricity is connected in advance.
2. The electric pre-feed pump according to claim 1, wherein the power switching unit includes a power switching switch and a first ac contactor electrically connected, a normally closed contact of the first ac contactor is electrically connected to the 380V ac power supply, a normally open contact of the first ac contactor is electrically connected to the 24V dc power supply, and an output terminal of the first ac contactor is electrically connected to the electric pre-feed pump;
and operating the power supply change-over switch to trigger the first alternating current contactor to act to change over the power supply.
3. The electric pre-oil feed pump of claim 2, further comprising a junction box on which the power supply unit and the main control unit are electrically connected.
4. The electric pre-oil supply pump according to claim 3, wherein a start-stop control unit for controlling start and stop of the electric pre-oil supply pump is further arranged on the junction box, the start-stop control unit comprises a second alternating current contactor electrically connected with the electric pre-oil supply pump and a control circuit, the control circuit is electrically connected with the power supply unit, and the control circuit triggers the second alternating current contactor to act so as to control the start or stop of the electric pre-oil supply pump.
5. The electric pre-oil feed pump according to claim 4, wherein the control circuit includes an automatic control circuit, a manual control circuit, and a remote control circuit, and mode change-over switches electrically connected to the automatic control circuit, the manual control circuit, and the remote control circuit, respectively, the mode change-over switches being electrically connected to the power supply unit;
and the mode selector switch acts to conduct the automatic control circuit and the second alternating current contactor, conduct the manual control circuit and the second alternating current contactor or conduct the remote control circuit and the second alternating current contactor.
6. The electric pre-oil supply pump according to claim 5, wherein the remote control loop comprises a remote control switch, the remote control switch is connected in series between the mode switch and the second AC contactor, the mode switch acts to turn on or off the power supply unit and the remote control switch, and the remote control switch is electrically connected with a remote control terminal, so that the remote control terminal remotely controls the start and stop of the electric pre-oil supply pump.
7. The electric pre-oil feed pump according to claim 5,
the automatic control loop comprises a first relay which is connected in series between the mode selector switch and the second alternating current contactor, and the mode selector switch acts to turn on or off the power supply unit and the first relay; the junction box is also provided with a first timing unit, a second timing unit and an oil pressure sensor which are electrically connected with the main control unit, the first timing unit counts time and transmits corresponding electric signals to the main control unit, and the main control unit controls the second alternating current contactor to start the electric pre-oil supply pump and start the second timing unit to time; the second timing unit counts time and transmits a corresponding electric signal to the main control unit, the main control unit triggers the second alternating current contactor to stop the electric pre-oil supply pump, or the oil pressure sensor collects real-time oil pressure of a main oil duct and transmits a corresponding electric signal to the main control unit, the main control unit compares the real-time oil pressure with a preset value and controls the second alternating current contactor to stop the electric pre-oil supply pump according to a comparison result;
the manual control loop comprises a start switch and a stop switch which are arranged in parallel, the start switch and the stop switch are respectively connected between the mode change-over switch and the second alternating current contactor in series, and the mode change-over switch acts to turn on or off the power supply unit and the start switch and simultaneously turn on or off the power supply unit and the stop switch; operating the starting switch to close the normally open contact of the second alternating current contactor and start the electric pre-oil supply pump; and operating the stop switch to disconnect the normally open contact of the second alternating current contactor and stop the electric pre-oil supply pump.
8. The electric pre-oil supply pump according to claim 3, wherein a power monitoring unit, a direct current power indicator lamp, a direct current voltage reduction indicator lamp and an alternating current power indicator lamp are further arranged on the junction box, the power monitoring unit is electrically connected with the main control unit, the 24V direct current power supply and the 380V alternating current power supply respectively, and the direct current power indicator lamp and the alternating current power indicator lamp are electrically connected with the first alternating current contactor respectively;
the power monitoring unit transmits a state electric signal corresponding to the power state to the main control unit, the main control unit controls the direct-current voltage low indicator lamp to be on or off according to the state electric signal, and the first alternating-current contactor controls the direct-current power indicator lamp or the alternating-current power indicator lamp to be on or off.
9. The electric pre-oil supply pump according to claim 4, wherein the power supply unit includes a transformer and a rectifier circuit, a primary side of the transformer is electrically connected to the second ac contactor, a secondary side of the transformer is electrically connected to the rectifier circuit, the rectifier circuit outputs a dc voltage, and an emergency stop switch is provided at an output end of the rectifier circuit.
10. The electric pre-oil feed pump according to claim 4, wherein the junction box is further provided with:
the overload monitoring unit is used for detecting whether the electric pre-oil supply pump is overloaded or not and transmitting a corresponding overload electric signal to the overload indicator lamp and the second relay so as to control the overload indicator lamp to be turned on and off and control the second relay to output an overload alarm signal, and the overload monitoring unit is also electrically connected with the power supply unit;
an operation indicator light electrically connected with the second AC contactor; and/or the presence of a gas in the gas,
and the alarm unit is electrically connected with the main control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021234612.4U CN212615207U (en) | 2020-06-29 | 2020-06-29 | Electric pre-oil supply pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113183854A (en) * | 2021-05-20 | 2021-07-30 | 华域实践(深圳)移动科技有限公司 | Intelligent modularized mobile shop vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113183854A (en) * | 2021-05-20 | 2021-07-30 | 华域实践(深圳)移动科技有限公司 | Intelligent modularized mobile shop vehicle |
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