Non-road mechanical pump engine protection system

Abstract

The utility model discloses a non-road mechanical pump engine protection system. The system comprises a flameout valve arranged on an engine; and a first switch and a second switch. The first switch comprises a rotating speed switch and a delay switch, and the second switch is an engine oil pressure switch; the first switch and the second switch are connected in series and then connected with the flameout valve. The non-road mechanical pump engine local overheating protection device can comprehensively prevent the phenomena of burning bush damage and the like caused by local overheating of a non-road mechanical pump engine, reduces the fault occurrence rate, reduces the maintenance cost, and has good practical popularization and application value.

Description

Technical Field

[0001] The utility model relates to the technical field of engine auxiliary equipment, in particular to a non-road mechanical pump engine protection system. Background Art

[0002] Non-road mechanical pump engines are mainly used in equipment such as engineering machinery, agricultural machinery, mining machinery, ships, and generators. During use, the engine may overheat. The main reasons include insufficient lubricating oil pressure or lubrication system failure, which leads to engine tile burning and increased temperature of friction parts; and the vehicle is just started and the refueling operation is not performed after the vehicle is warmed up, which causes damage to the engine. In addition, the friction increases due to severe wear of mechanical pump components such as bearings and seals, or the heat cannot be dissipated in time due to unreasonable settings such as heat dissipation system failure, and operation in harsh environments such as high temperature, high humidity, and high dust, which can easily cause the engine temperature to be too high. In actual applications, engine cylinder scuffing due to engine overheating, improper oil pressure causing engine tile burning, and further resulting in oil waste, or shortening the engine life, insufficient power, or even engine scrapping, as well as the resulting low work efficiency or economic losses. Therefore, the utility model aims to develop a non-road mechanical pump engine protection system to better meet actual needs. Summary of the Invention

[0003] The technical problem solved by the present invention is to provide a non-road mechanical pump engine protection system to solve the shortcomings of the above-mentioned background technology.

[0004] The technical problem solved by the present invention is achieved by the following technical solutions:

[0005] A non-road mechanical pump engine protection system, comprising:

[0006] A flameout valve provided on the engine; and a first switch and a second switch;

[0007] The first switch includes a speed switch and a delay switch, and the second switch is an oil pressure switch;

[0008] The first switch and the second switch are connected in series and then connected to the flameout valve.

[0009] In the present invention, a power supply and a power supply switch are further provided on the circuit in which the first switch, the second switch and the flameout valve are connected in series.

[0010] The present invention further comprises a first temperature control switch which is arranged on the engine and is used for detecting the water temperature in the engine. The temperature range controlled by the first temperature control switch is ≤50°C.

[0011] In the present invention, the first temperature control switch is connected to the oil control valve that controls the engine throttle; when the water temperature in the engine is lower than 50°C, the first temperature control switch is connected, and the oil control valve limits the engine fuel supply, so that the equipment is in an idle hot engine state; when the water temperature in the engine is higher than 50°C, the first temperature control switch is disconnected, and the oil control valve resumes the engine fuel supply.

[0012] The present invention further comprises a second temperature control switch which is arranged on the engine and is used for detecting the water temperature in the engine. The temperature range controlled by the second temperature control switch is ≤85°C.

[0013] In the present invention, the second temperature control switch is connected to an alarm, and when the water temperature in the engine is higher than 85°C, the alarm is activated.

[0014] In the present invention, a third temperature control switch is provided on the engine for detecting the water temperature in the engine, and the temperature range controlled by the third temperature control switch is ≤95°C.

[0015] In the present invention, the third temperature control switch is connected to the flameout valve. When the water temperature in the engine is higher than 95°C, the third temperature control switch is connected, the flameout valve is activated, and the engine stops working.

[0016] Beneficial effects: The non-road mechanical pump engine protection system described in the utility model controls the power-on and power-off states of the engine flameout valve through the first switch and the second switch to realize the flameout protection of the engine, thereby preventing the engine from running unsteadily and losing power, and preventing the bearings of important friction parts of the engine such as the crankshaft, connecting rod and camshaft from being poorly lubricated, causing high temperature overheating and then causing engine tile burning damage, etc., further improving work efficiency, reducing the occurrence of faults, reducing maintenance costs, extending service life, and having better economic benefits.

[0017] Furthermore, the utility model can better control the operation of the engine by monitoring the engine water temperature, thereby better avoiding engine overheating and causing engine cylinder seizure, and the oil pressure switch can avoid the occurrence of engine cylinder damage caused by insufficient oil pressure, and the actual application effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a preferred embodiment of the present utility model.

[0019] Figure 2 This is a schematic diagram of the structure after further improvement in the preferred embodiment of the utility model (1).

[0020] Figure 3 This is a schematic diagram of the structure after further improvement in the preferred embodiment of the utility model (II).

[0021] Figure 4This is a schematic diagram of the structure after further improvement in the preferred embodiment of the utility model (3).

[0022] Among them: 1. Engine; 2. First temperature control switch; 3. Second temperature control switch; 4. Third temperature control switch; 5. Oil control valve; 6. Flame extinguishing valve; 7. First switch; 8. Second switch; 9. Alarm. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0024] See also Figure 1 shown.

[0025] The present invention discloses an engine protection system for an off-road mechanical pump, comprising: a flameout valve 6 mounted on an engine 1; a first switch 7 and a second switch 8; the first switch 7 comprising a speed switch and a timer switch, and the second switch being an oil pressure switch; the first and second switches 7 and 8 being connected in series to the flameout valve. The speed switch is used to detect the speed of the engine 1 and control the opening and closing of the series circuit; the timer switch is used to control the timing of the speed switch opening and closing; and the oil pressure switch 8 is used to detect the oil pressure within the engine 1 and control the opening and closing of the series circuit. A power supply and a power supply switch are also provided on the circuit connecting the first and second switches 7 and 8 in series to the flameout valve 6.

[0026] Specifically, when the engine 1's speed is zero, the first switch 7 is disconnected, and the flameout valve 6 is not energized, which does not affect the normal operation of the fuel supply system. When the engine 1's speed is not zero, the first switch 7 is connected. The first switch 7 includes a delay switch. The delay time is required because the engine 1's oil pressure needs a certain amount of time to build up. The delay time is 10-30 seconds. If the first switch 7 is connected prematurely, the oil pressure will not reach the required pressure when the engine 1 is started, causing the second switch 8 to be connected and the flameout valve 6 to be energized, causing the fuel supply system to stop supplying fuel and preventing the engine 1 from starting.

[0027] The second switch 8 is associated with the oil pressure of the engine 1. When the oil pressure in the engine 1 is lower than a normal value, the second switch 8 is connected. When the oil pressure in the engine 1 is a normal value, the second switch 8 is disconnected.

[0028] In actual use, when engine 1 is not started, the engine speed is zero, and first switch 7 is disconnected. When engine 1 is ignited and operating normally, and reaches a certain speed (non-zero speed, including normal speed and idle speed), first switch 7 is connected. While first switch 7 is connected, and the oil pump operates for a period ranging from several seconds to several tens of seconds, the oil pressure of engine 1 reaches a certain value. If the oil pressure detected by pressure sensor 8 is within the normal range, second switch 8 remains disconnected, and flameout valve 6 is de-energized. If the oil pressure falls below the normal value, second switch 8 is connected. At this time, when both first and second switches 7 and 8 are connected, flameout valve 6 is energized, and engine 1 is passively shut down, thereby providing timely protection for engine 1. In actual use, the series circuit of first and second switches 7 and 8 can be controlled to be open or closed by the power switch according to actual needs.

[0029] As an improvement to the present invention, Figure 2 As shown, the engine 1 protection system also includes a first temperature control switch 2 mounted on the engine 1 for detecting the water temperature within the engine 1. The temperature range controlled by the first temperature control switch is ≤50°C. The first temperature control switch is connected to the oil control valve that controls the engine throttle. When the water temperature within the engine is below 50°C, the first temperature control switch is connected, and the oil control valve restricts engine fuel supply. When the water temperature within the engine is above 50°C, the first temperature control switch is disconnected, and the oil control valve resumes engine fuel supply.

[0030] As a further improvement to the present invention, Figure 3 As shown, the engine 1 protection system also includes a second temperature control switch provided on the engine for detecting the water temperature in the engine. The temperature range controlled by the second temperature control switch is ≤85°C. The second temperature control switch is connected to an alarm. When the water temperature in the engine is higher than 85°C, the alarm is activated, thereby promptly reminding the operator to pay attention to and troubleshoot the fault in time.

[0031] As a further improvement to the present invention, Figure 4 As shown, the engine 1 protection system also includes a third temperature control switch installed on the engine for detecting the water temperature in the engine. The temperature range controlled by the third temperature control switch is ≤ 95°C. The third temperature control switch is connected to the flameout valve. When the water temperature in the engine exceeds 95°C, the third temperature control switch is connected, the flameout valve is activated, and the engine stops.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components.

[0035] The above content is a further detailed description of the present invention in combination with specific implementation methods, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention.

Claims

1. A non-road mechanical pump engine protection system, characterized in that: include: A flameout valve provided on the engine; and a first switch and a second switch; The first switch includes a speed switch and a delay switch, and the second switch is an oil pressure switch; The first switch and the second switch are connected in series and then connected to the flameout valve.

2. The non-road machinery pump engine protection system according to claim 1, characterized in that: A power supply and a power supply switch are also provided on the circuit in which the first switch, the second switch and the flameout valve are connected in series.

3. The non-road machinery pump engine protection system according to claim 1, characterized in that: It also includes a first temperature control switch arranged on the engine for detecting the water temperature in the engine, and the temperature range controlled by the first temperature control switch is ≤50°C.

4. The non-road machinery pump engine protection system according to claim 3, characterized in that: The first temperature control switch is connected to the oil control valve that controls the engine throttle; when the water temperature in the engine is lower than 50°C, the first temperature control switch is connected, and the oil control valve limits the engine fuel supply, so that the equipment is in an idle hot engine state; when the water temperature in the engine is higher than 50°C, the first temperature control switch is disconnected, and the oil control valve resumes the engine fuel supply.

5. The off-road mechanical pump engine protection system according to claim 1, characterized in that: It also includes a second temperature control switch arranged on the engine for detecting the water temperature in the engine, and the temperature range controlled by the second temperature control switch is ≤85°C.

6. The off-road mechanical pump engine protection system according to claim 5, characterized in that: The second temperature control switch is connected to an alarm, and when the water temperature in the engine is higher than 85°C, the alarm is activated.

7. The off-road mechanical pump engine protection system according to claim 1, characterized in that: A third temperature control switch is provided on the engine for detecting the water temperature in the engine. The temperature range controlled by the third temperature control switch is ≤95°C.

8. The non-road machinery pump engine protection system according to claim 7, characterized in that: The third temperature control switch is connected to the flameout valve. When the water temperature in the engine is higher than 95°C, the third temperature control switch is connected, the flameout valve is activated, and the engine stops working.

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