Engine alarm flameout device
By designing an engine alarm shutdown device, which uses temperature sensors and pressure switches to detect abnormalities and time-delay relays to control shutdown, the problem of engine failure escalation during mine construction is solved, and equipment safety and production stability are improved.
Patent Information
- Application Number
- CN202520510251.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-22
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-03-22
AI Technical Summary
During mine construction, the Cummins QSB6.7 engine of the MK-A20 truck repeatedly suffered cylinder scoring or bearing burnout before reaching the end of its service life. The existing alarm system failed to shut down the engine in time, causing the faults to escalate and affecting production safety.
Design an engine alarm shutdown device that uses a temperature sensor and a pressure switch to detect water temperature and oil pressure, and uses a time-delay relay to control engine power supply, automatically delaying shutdown to prevent the fault from escalating.
It enables timely shutdown in abnormal situations, preventing further deterioration of the fault and improving equipment safety and production stability.
Smart Images
Figure CN223661971U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an engine protection device for mining trucks, specifically an engine alarm and shutdown device. Background Technology
[0002] In mine construction, various trucks are needed for underground operations, among which the MK-A20 underground truck is a commonly used model. This truck is equipped with a Cummins QSB6.7 engine as its power system. However, since this type of truck went into production, there have been numerous instances of engine failures such as cylinder scoring and bearing burnout before reaching the end of its service life, seriously affecting normal mine production and increasing production costs.
[0003] Typically, before an engine experiences cylinder scoring or bearing failure, signs of low oil pressure or high engine temperature will appear. If these signs are not detected in time, serious malfunctions such as cylinder scoring or bearing failure can occur within minutes or even seconds of operation. Although the instrument panel on the truck inside the pit will display warnings for high coolant temperature or low oil pressure, it will not force the engine to shut down when the warning is triggered. Therefore, if the driver fails to notice the warnings and take appropriate action while operating the equipment, the malfunction will worsen, potentially leading to an accident. Utility Model Content
[0004] This utility model proposes an engine alarm shutdown device, the purpose of which is to solve the problem of not being able to shut down the engine in time when an abnormality occurs to prevent the fault from escalating further.
[0005] The technical solution of this utility model is as follows:
[0006] An engine alarm shutdown device is provided, wherein the engine body is provided with a power interface and a turbocharger lubricating oil port, the power interface is electrically connected to a power supply device through a power supply line, and the turbocharger lubricating oil port is connected to an oil supply device through a lubrication pipeline. The engine alarm shutdown device includes a temperature sensor, a temperature controller, a pressure switch, a first time delay relay, and a second time delay relay.
[0007] The temperature sensor is used to detect the temperature of the cooling water inside the machine. The signal output terminal of the temperature sensor is electrically connected to the temperature signal input terminal of the temperature controller, and the control signal output terminal of the temperature controller is connected to the signal input terminal of the second time delay relay.
[0008] The pressure switch is used to detect the oil pressure in the lubrication pipeline or at the lubrication port of the turbocharger; the signal output terminal of the pressure switch is connected to the signal input terminal of the first time delay relay.
[0009] The normally closed contact of the first time delay relay and the normally closed contact of the second time delay relay are connected in series in the power supply line.
[0010] As a further improvement to the engine alarm shutdown device, the temperature sensor is installed at the coolant service port on the engine block.
[0011] As a further improvement to the engine alarm shutdown device: a tee is installed on the lubrication line, and the pressure switch is installed on the tee.
[0012] Compared with existing technologies, this invention has the following advantages: This device detects water temperature and oil pressure through a temperature sensor and a pressure switch, and simultaneously controls the engine to shut down via a time-delay relay. When the water temperature or oil pressure exceeds a preset range and remains there for a preset duration, the corresponding time-delay relay will be automatically triggered, thereby disconnecting the power supply to the engine and shutting it down in time, preventing the malfunction from escalating and causing an accident. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0014] The technical solution of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.
[0015] like Figure 1 The truck engine block 4 is equipped with a power interface 4-1 and a turbocharger lubrication port 4-2. The power interface 4-1 is electrically connected to the power supply device 1 via a power supply line to provide power to the engine. The turbocharger lubrication port 4-2 is connected to the oil supply device via a lubrication pipeline to provide lubricating oil to the turbocharger. Additionally, the engine block 4 is also equipped with a coolant maintenance hole.
[0016] The engine alarm shutdown device proposed in this utility model includes a temperature sensor 8, a thermostat 7, a pressure switch 5, a first time delay relay 2, and a second time delay relay 3.
[0017] The temperature sensor 8 is installed at the coolant maintenance port and is used to detect the temperature of the coolant inside the machine body 4. The signal output terminal of the temperature sensor 8 is electrically connected to the temperature signal input terminal of the temperature controller 7, and the control signal output terminal of the temperature controller 7 is connected to the signal input terminal of the second time-delay relay 3. In this embodiment, the temperature sensor 8 has a range of 0℃-99.9℃; the temperature controller 7 is model XH-W3001, which is a high-precision digital display temperature controller with a temperature control accuracy of up to 0.1℃. Before operation, the temperature controller 7 is set so that when the water temperature reaches 99℃, it sends an action signal to the second time-delay relay 3.
[0018] The pressure switch 5 is used to detect the oil pressure in the lubrication pipeline or at the turbocharger lubrication port 4-2. In this embodiment, a tee 6 is installed on the lubrication pipeline, and the pressure switch 5 is installed on the newly extended interface of the tee 6 to detect the oil pressure in the lubrication pipeline. The signal output terminal of the pressure switch 5 is connected to the signal input terminal of the first time delay relay 2. When the detected pressure exceeds the preset value of the pressure switch 5, an action signal is issued.
[0019] The normally closed contact of the first time-delay relay 2 and the normally closed contact of the second time-delay relay 3 are connected in series in the power supply line. In this embodiment, the time-delay relay is model GRT8-B. The time required to trigger an accident varies depending on the type of abnormality. In this embodiment, the operating delay time of the first time-delay relay 2 is 5, 7, or 10 seconds, and the operating delay time of the second time-delay relay 3 is 10, 12, or 15 seconds. When the time-delay relay receives a signal and the signal duration reaches the delay time, the normally closed contact of the relay will open.
[0020] When the oil pressure detected by pressure switch 5 is lower than the preset value, the first time delay relay 2 receives the signal and starts timing. After the preset time, the normally closed contact is opened, thereby disconnecting the power supply to the engine and causing the engine to shut down.
[0021] Similarly, when the water temperature detected by the temperature sensor 8 is lower than the preset value, the second time delay relay 3 receives the signal and starts timing. After a preset time, the normally closed contact is opened, thereby disconnecting the power supply to the engine and causing the engine to shut down.
[0022] Therefore, regardless of whether the oil pressure or water temperature is abnormal, this device can delay disconnecting the engine's power supply, achieving delayed automatic shutdown in case of a fault, and preventing the fault from causing a more serious accident.
[0023] It should be noted that, as will be apparent to those skilled in the art, this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. The scope of this utility model is defined by the claims rather than the foregoing description.
Claims
1. An engine alarm and shutdown device, wherein the engine body is provided with a power interface and a turbocharger lubrication port, the power interface is electrically connected to a power supply device via a power supply line, and the turbocharger lubrication port is connected to a lubrication supply device via a lubrication pipeline, characterized in that: The engine alarm shutdown device includes a temperature sensor, a thermostat, a pressure switch, a first time delay relay, and a second time delay relay. The temperature sensor is used to detect the temperature of the cooling water inside the machine. The signal output terminal of the temperature sensor is electrically connected to the temperature signal input terminal of the temperature controller, and the control signal output terminal of the temperature controller is connected to the signal input terminal of the second time delay relay. The pressure switch is used to detect the oil pressure in the lubrication pipeline or at the lubrication port of the turbocharger; the signal output terminal of the pressure switch is connected to the signal input terminal of the first time delay relay. The normally closed contact of the first time delay relay and the normally closed contact of the second time delay relay are connected in series in the power supply line.
2. The engine alarm and shutdown device as described in claim 1, characterized in that: The temperature sensor is installed at the coolant maintenance port on the machine body.
3. The engine alarm and shutdown device as described in claim 1, characterized in that: A tee is installed on the lubrication pipeline, and the pressure switch is installed on the tee.