Fuel supply control system for engine laboratory
By introducing an oil level sensor and an electrical control unit into the engine laboratory fuel supply control system, automatic fuel supply and emergency fuel return functions are achieved, solving the safety hazards of traditional fuel supply systems and ensuring the safety of the laboratory without accidents.
Patent Information
- Application Number
- CN202423021238.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Traditional engine laboratory fuel supply systems pose electrical and high-temperature safety hazards, are prone to fire risks, and lack emergency fuel backflow protection measures, endangering the safety of the laboratory, personnel, and property.
Design a fuel supply control system for an engine laboratory. Employ components such as oil level sensors, relays, and contactors to achieve automatic fuel supply and emergency fuel return functions. The system automatically supplies fuel based on the oil level through an electrical control unit and activates the fuel return function with a single button press in an emergency to ensure that fuel flows back to the underground oil depot.
It achieves precise and controllable fuel supply to the laboratory, and can automatically adjust according to the amount of fuel used, ensuring timely fuel return in emergencies, avoiding the risk of combustion, and ensuring laboratory safety.
Smart Images
Figure CN223461264U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of engine experiment, especially a kind of engine laboratory fuel supply control system. BACKGROUND
[0002] Engine laboratory does various development, calibration, emission, endurance etc., fuel supply must have a set of safe and reliable protection system with protection function, traditional engine laboratory oil supply system, through metal oil pipe pump pressure direct access laboratory high oil tank, then shunt to each laboratory test bench, laboratory exists electrical, engine operation high temperature, various unsafe factors of electrical equipment, prone to laboratory gasoline combustion fire major risk.
[0003] As engine high load operation laboratory, there is no fuel supply protection measure, bring huge risk to laboratory and personnel, property, the utility model can realize that oil supply system supplies oil according to oil level use condition automatic replenishment, can use manual control, automatic control, one-key start oil return function when encountering emergency, laboratory oil supply system fuel is quickly returned to underground oil depot, fuel pipeline is in oxygen deficiency without combustion condition under the state of return, avoid unnecessary property loss. UTILITY MODEL CONTENT
[0004] The utility model aims at providing a kind of engine laboratory fuel supply control system, according to laboratory engine test stand working load state, realizes automatic oil supply using electrical control unit, can realize emergency oil return function by pressing emergency stop when encountering emergency.
[0005] The technical scheme of the utility model is:
[0006] A kind of engine laboratory fuel supply control system, comprising:
[0007] Three-phase alternating current, respectively to oil supply motor M1, oil return motor M2 power supply;
[0008] Switching power supply UR2, input the three-phase alternating current, output direct current;
[0009] Oil level upper limit sensor B1, oil level lower limit sensor B2, respectively set in laboratory oil tank upper portion and lower portion, two sensors B1, B2 are respectively connected by the direct current power supply;
[0010] Intermediate relay KA5, KA6, respectively connect oil level upper limit sensor B1, oil level lower limit sensor B2 output;Intermediate relay KA5, KA6 one group of normally open contact is connected in series between upper limit sensor B1 output and switching power supply UR2 direct current output;
[0011] An oil supply contactor KM1 is powered by the DC connection, and a set of normally closed contacts of an intermediate relay KA5 and a set of normally open contacts and a set of normally closed contacts of an intermediate relay KA6 in parallel with each other are connected in series on the power supply line of the oil supply contactor KM1; the normally open contacts of the oil supply contactor KM1 are connected in series on the three-phase power supply line of an oil supply motor M1;
[0012] An oil return contactor KM2 is powered by the DC connection, and the normally open contacts of the oil return contactor KM2 are connected in series on the three-phase power supply line of an oil return motor M2, and the normally closed contacts of the oil return contactor KM2 are connected in series on the power supply bus of an upper oil level limit sensor B1, a lower oil level limit sensor B2 and the oil supply contactor KM1.
[0013] Preferably, a time delay relay KT1 is powered by the DC connection, and a set of normally closed contacts of the time delay relay KT1 are connected in series with the oil return contactor KM2.
[0014] Preferably, an emergency stop button SB4 is connected in series with the normally open contacts of the oil return contactor KM2 and the normally closed contacts of the time delay relay KT1.
[0015] Preferably, a rotary switch SA1 is provided, which includes a common terminal, an automatic stop contact and a manual stop contact; the common terminal of the rotary switch SA1 is connected to the DC output terminal of a switching power supply UR2, the automatic stop contact is connected to a set of normally open contacts and a set of normally closed contacts of the intermediate relay KA6 in parallel with each other, and the manual stop contact is connected to a manual control assembly.
[0016] Preferably, the manual control assembly includes a start button SB2, a stop button SB3 and an intermediate relay KA7 connected in series; a set of normally open contacts of the intermediate relay KA7 are connected in parallel with the start button SB2, one end of another set of normally open contacts is connected to the common terminal of the rotary switch SA1, and the other end is connected to the normally closed contacts of the intermediate relay KA5.
[0017] Preferably, an oil return electromagnetic valve YV1 is connected in parallel with the oil return contactor KM2.
[0018] Preferably, the three-phase power supply lines of the oil supply motor M1 and the oil return motor M2 further have overheat relays KH1 and KH2 connected in series, respectively.
[0019] Preferably, the three-phase AC power is connected in series with a total power circuit breaker FQ2 on the total power supply line, and power circuit breakers FQ3, FQ4 and FQ5 are connected in series on the power supply lines of the oil supply motor M1, the oil return motor M2 and the switching power supply UR2, respectively.
[0020] Preferably, the positive and negative poles of the output terminal of the switching power supply UR2 are connected in series with fuses FU3 and FU4, respectively.
[0021] Preferably, a power indicator light HL5 is connected between the positive and negative poles of the output end of the switching power supply UR2;
[0022] A set of normally closed contacts of the oil supply contactor KM1 and a stop indicator light HL8 are connected in series between the positive and negative poles of the output end of the switching power supply UR2;
[0023] The two ends of the oil return contactor KM2 are connected in parallel with a fault indicator light HL6;
[0024] A start indicator light HL7 is connected in parallel to both ends of the intermediate relay KA7.
[0025] The advantages of the utility model are:
[0026] The utility model arranges an oil supply control motor and an oil return control motor in the oil supply pipeline system to realize oil supply and emergency oil return. When the oil level is lower than the limit value of the oil tank, the low liquid level sensor executes the action of the oil supply motor to start oil supply. When the oil level is higher than the limit value of the high oil level sensor, the sensor executes the oil supply motor to stop. When encountering an emergency, press the emergency stop button, the emergency stop button connects to the oil return control to execute the oil return motor to start, and at the same time the oil return solenoid valve opens to perform emergency oil return. The use of the above control logic can realize accurate and controllable laboratory oil supply, can realize automatic oil supply according to the amount of oil used, can realize timely control of oil return in emergency, and ensure the safety of laboratory personnel and property. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0028] Figure 1 This is a schematic diagram of the engine laboratory fuel supply control system of the present utility model;
[0029] Figure 2 This is a schematic diagram of the layout of the engine laboratory fuel supply control system of the present invention. DETAILED DESCRIPTION
[0030] like Figure 1 、 2 As shown, the engine laboratory fuel supply control system of this embodiment includes the following components.
[0031] Three-phase AC power is supplied to the oil supply motor M1 and the oil return motor M2. This three-phase AC power supply is connected in series with a main power circuit breaker FQ2. The power supply lines to the oil supply motor M1, the oil return motor M2, and the switching power supply UR2 are connected in series with power circuit breakers FQ3, FQ4, and FQ5, respectively. Overheating relays KH1 and KH2 are also connected in series to the three-phase power supply lines to the oil supply motor M1 and the oil return motor M2, respectively.
[0032] Switching power supply UR2, input the three-phase alternating current, output 24V direct current; the positive and negative poles of the output end of the switching power supply UR2 are respectively connected in series with fuses FU3, FU4. The positive and negative poles of the output end of the switching power supply UR2 are connected with a power indicator lamp HL5.
[0033] The oil level upper limit sensor B1 and the oil level lower limit sensor B2 are respectively arranged at the upper and lower parts of the laboratory oil storage tank, and the two sensors B1 and B2 are respectively powered by the direct current connection.
[0034] The intermediate relays KA5 and KA6 are respectively connected to the output ends of the oil level upper limit sensor B1 and the oil level lower limit sensor B2; a group of normally open contacts of the intermediate relays KA5 and KA6 are connected in series between the output end of the upper limit sensor B1 and the direct current output end of the switching power supply UR2.
[0035] The oil supply contactor KM1 is powered by the direct current connection, and a group of normally closed contacts of the intermediate relay KA5 and a group of normally open contacts and a group of normally closed contacts of the intermediate relay KA6 connected in parallel with each other are further connected in series on the power supply circuit; the normally open contacts of the oil supply contactor KM1 are connected in series on the three-phase power supply line of the oil supply motor M1; a group of normally closed contacts of the oil supply contactor KM1 connected in series, a stop indicator lamp HL8 are connected between the positive and negative poles of the output end of the switching power supply UR2.
[0036] The oil return contactor KM2 is powered by the direct current connection, and the normally open contacts of the oil return contactor KM2 are connected in series on the three-phase power supply line of the oil return motor M2, and the normally closed contacts of the oil return contactor KM2 are connected in series on the power supply bus of the oil level upper limit sensor B1, the oil level lower limit sensor B2 and the oil supply contactor KM1. The fault indicator lamp HL6 is connected in parallel across the oil return contactor KM2.
[0037] The oil return electromagnetic valve YV1 is connected in parallel with the oil return contactor KM2.
[0038] The time delay relay KT1 is powered by the direct current connection, and a group of normally closed contacts of the time delay relay KT1 are connected in series with the oil return contactor KM2.
[0039] The emergency stop button SB4 is connected in series with the normally open contacts of the oil return contactor KM2, and the normally closed contacts of the emergency stop button SB4 are connected in series with the time delay relay KT1.
[0040] A rotary switch SA1 is provided, which includes a common terminal, an automatic gear contact and a manual gear contact; the common terminal of the rotary switch SA1 is connected to the DC output terminal of the switching power supply UR2, the automatic gear contact is connected to a set of normally open contacts and a set of normally closed contacts of the intermediate relay KA6 which are connected in parallel with each other; and the manual gear contact is connected to a manual control assembly. The manual control assembly includes a start button SB2, a stop button SB3 and an intermediate relay KA7 connected in series. A set of normally open contacts of the intermediate relay KA7 is connected in parallel with the start button SB2, one end of another set of normally open contacts is connected to the common terminal of the rotary switch SA1, and the other end is connected to the normally closed contact of the intermediate relay KA5. The intermediate relay KA7 has a start indicator lamp HL7 connected in parallel across the two terminals thereof.
[0041] The total power supply circuit breaker FQ2 is closed to supply power to the whole circuit, the circuit breakers FQ3 and FQ4 are motor sub-power switches, and the circuit breaker FQ5 is a control power switch. The switching power supply UR2 provides 24V power supply for the control circuit after being powered on. FU3 and FU4 are fuses of the control circuit. When the whole control circuit is powered on, the power indicator lamp HL5 is always on. When the oil supply contactor KM1 is powered on, its normally closed contact is disconnected, so that the stop indicator lamp HL8 is de-energized and extinguished. When the KM1 is de-energized, its normally closed contact restores conduction and the HL8 is energized and lit up.
[0042] When the rotary switch SA1 is set to the automatic gear and the lower limit position sensor B2 senses oil, the output voltage is supplied to the lower limit position relay KA6, so that its normally open contact is closed. When the upper limit position sensor B1 does not sense oil, the upper limit position relay KA5 is not actuated, and its normally closed contact is in the closed state. At this time, the oil supply contactor is attracted through the thermal relay KH1 to supply power to the oil supply motor M1, so that it pumps oil into the oil tank. When the oil level reaches the upper limit position sensor B1, the sensor B1 is connected to make the upper limit position relay KA5 attracted. The normally open contact of KA5 is closed for self-locking, and the normally closed contact is disconnected, so that the KM1 is de-energized to stop the oil supply motor. When the oil level drops below the lower limit position sensor B2, the lower limit position sensor KA6 is de-energized, its normally closed contact is restored to be closed, the normally open contact is disconnected, and KA5 self-locking is also disconnected. At this time, because of KA6, the normally closed contact of KA6 is connected, so that the KM1 is again energized to supply power to the oil supply motor. The oil supply to the oil tank is started, and the cycle is repeated.
[0043] When the SA1 switch is set to the manual gear, the automatic gear is disabled. The manual start button SB2 is pressed to attract the manual start relay KA7, its normally open contact is closed to form self-locking, and the other normally open contact is connected to the KM1, and the start indicator lamp HL7 is lit up. At this time, if the oil level reaches the upper limit position sensor B1, the KA5 is connected to de-energize the KM1 to stop the oil supply motor. If the oil level does not reach the upper limit position sensor B1, the KM1 is connected to supply oil to the oil supply motor until the oil level reaches the upper limit position sensor B1. The manual stop button SB3 is pressed to de-energize the KA7, its normally open and normally closed contacts are restored to the initial state, and the HL7 is also extinguished.
[0044] When the emergency stop button SB4 is pressed, its normally closed contact is disconnected, the time delay relay KT1 is de-energized to start timing for 30 minutes, at the same time, its normally open contact is connected to the oil return contact KM2, the oil return solenoid YV1 and the fault indicator HL6 is lighted. When the time relay timing is over, its delay open contact KT1 is disconnected, KM2, YV1 and HL6 are de-energized. When the emergency stop button is reset, its normally closed contact is restored to be conductive, KT1 is energized to be reset and waits for the next de-energized action.
[0045] The above control logic can realize precise and controllable oil supply in the laboratory, can realize automatic oil supply according to the oil consumption, can realize timely control of oil return in emergency, and can ensure the safety of laboratory personnel and property.
[0046] The above examples are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable the person skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any modification made according to the spirit and essence of the main technical scheme of the present application should be covered in the protection scope of the present application.
Claims
1. An engine laboratory fuel supply control system characterized by, The system comprises: Three-phase alternating current, which respectively supplies power to the oil supply motor M1 and the oil return motor M2; A switching power supply UR2, which inputs the three-phase alternating current and outputs direct current; An upper oil level limit sensor B1 and a lower oil level limit sensor B2, which are respectively arranged at the upper and lower parts of the laboratory oil storage tank, and are respectively powered by the direct current; Intermediate relays KA5 and KA6, which are respectively connected to the output ends of the upper oil level limit sensor B1 and the lower oil level limit sensor B2; a group of normally open contacts of the intermediate relays KA5 and KA6 are connected in series between the output end of the upper oil level limit sensor B1 and the direct current output end of the switching power supply UR2; An oil supply contactor KM1, which is powered by the direct current, and further has a group of normally closed contacts of the intermediate relay KA5 and a group of normally open contacts and a group of normally closed contacts of the intermediate relay KA6 connected in parallel in series on the power supply circuit; the normally open contacts of the oil supply contactor KM1 are connected in series on the three-phase power supply line of the oil supply motor M1; An oil return contactor KM2, which is powered by the direct current, and has the normally open contacts of the oil return contactor KM2 connected in series on the three-phase power supply line of the oil return motor M2, and the normally closed contacts of the oil return contactor KM2 connected in series on the power supply bus of the upper oil level limit sensor B1, the lower oil level limit sensor B2 and the oil supply contactor KM1.
2. The engine laboratory fuel supply control system according to claim 1, characterized by, Further comprising a time delay relay KT1, which is powered by the direct current, and has a group of normally closed contacts of the time delay relay KT1 connected in series with the oil return contactor KM2.
3. The engine laboratory fuel supply control system of claim 2 wherein, Further comprising an emergency stop button SB4, which has the normally open contacts connected in series with the oil return contactor KM2, and the normally closed contacts connected in series with the time delay relay KT1.
4. The engine laboratory fuel supply control system according to claim 3, characterized by Further comprising a rotary switch SA1, which comprises a common terminal, an automatic stop contact and a manual stop contact; the common terminal of the rotary switch SA1 is connected to the direct current output end of the switching power supply UR2, the automatic stop contact is connected to a group of normally open contacts and a group of normally closed contacts of the intermediate relay KA6 connected in parallel, and the manual stop contact is connected to a manual control assembly.
5. The engine laboratory fuel supply control system of claim 4 wherein, The manual control assembly comprises a start button SB2, a stop button SB3 and an intermediate relay KA7 connected in series; a group of normally open contacts of the intermediate relay KA7 are connected in parallel with the start button SB2, one end of another group of normally open contacts is connected to the common terminal of the rotary switch SA1, and the other end is connected to the normally closed contacts of the intermediate relay KA5.
6. The engine laboratory fuel supply control system of claim 1, wherein Further comprising an oil return electromagnetic valve YV1, which is connected in parallel with the oil return contactor KM2.
7. The engine laboratory fuel supply control system of claim 1, wherein Further comprising overheat relays KH1 and KH2 connected in series on the three-phase power supply lines of the oil supply motor M1 and the oil return motor M2 respectively.
8. The engine laboratory fuel supply control system of claim 1, wherein The three-phase alternating current is connected in series with a total power supply circuit breaker FQ2 on a total power supply line, and the power supply lines of the oil supply motor M1, the oil return motor M2 and the switching power supply UR2 are respectively connected in series with power supply circuit breakers FQ3, FQ4 and FQ5.
9. The engine laboratory fuel supply control system of claim 1, wherein The positive and negative terminals of the output end of the switching power supply UR2 are respectively connected in series with fuses FU3 and FU4.
10. The engine laboratory fuel supply control system according to claim 5, wherein A power supply indicator lamp HL5 is connected between the positive and negative terminals of the output end of the switching power supply UR2. A set of normally closed contacts of an oil supply contactor KM1 in series is connected between the positive and negative terminals of the switching power supply UR2; A fault indicator HL6 is connected in parallel across the oil return contactor KM2; A start indicator HL7 is connected in parallel across the intermediate relay KA7.