Universal power automatic switch oil way

Abstract

The utility model discloses a general power automatic switch oil way which comprises an oil tank and a carburetor communicated with the oil tank through a fuel pipe, and the carburetor is arranged in an engine and used for atomizing and supplying fuel. An electromagnetic valve and a negative pressure fuel pump are sequentially arranged on the fuel pipe in series, and the negative pressure fuel pump is communicated with an intake manifold arranged in an engine through a negative pressure pipe, so that negative pressure is formed in the negative pressure fuel pump and then the negative pressure fuel pump is in an open state to supply fuel to a carburetor. The electromagnetic valve and the negative pressure fuel pump are sequentially arranged on the fuel pipe connecting the carburetor and the fuel tank in series, when an engine stops or is not used for a long time, the electromagnetic valve is powered off, then connection between the fuel tank and the carburetor can be cut off, meanwhile, the negative pressure fuel pump loses negative pressure to stop working, fuel supply to the carburetor is stopped, and an oil way is cut off. A small amount of fuel oil can be prevented from entering an air cylinder of the engine, and therefore the safety of the engine is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engines, and particularly relates to a universal power automatic switch oil circuit. Background Art

[0002] At present, the universal power on the market is applied in the fields of machinery, automobiles, agricultural machinery, ships, etc., and mainly includes universal engines. For the existing universal power, gasoline or diesel is pumped from the fuel tank into the carburetor through a negative pressure fuel pump, and the fuel is atomized by the carburetor to supply fuel to the engine. Therefore, the oil circuit of the existing universal power equipment mainly pumps fuel through a negative pressure fuel pump arranged between the fuel tank and the carburetor, and the negative pressure fuel pump is used as a switch to cut off the oil circuit. However, when the above-mentioned universal power equipment is in use, when it stops running or is not used for a long time, it is found that there is still a little fuel that can enter the carburetor through the negative pressure fuel pump and then enter the cylinder. When fuel enters the cylinder, it will cause engine power failure, posing a great potential safety hazard. Content of the Utility Model

[0003] Aiming at the above deficiencies, the purpose of the utility model is to provide a universal power automatic switch oil circuit, which solves the problem that when the universal power oil circuit in the prior art stops running or is not used for a long time, there is still a little fuel that can enter the cylinder through the negative pressure fuel pump, resulting in engine power failure.

[0004] To achieve the above purpose, the technical solution provided by the utility model is:

[0005] A universal power automatic switch oil circuit includes a fuel tank and a carburetor connected to the fuel tank through a fuel pipe. The carburetor is arranged in the engine to atomize fuel for oil supply. An electromagnetic valve and a negative pressure fuel pump are sequentially connected in series on the fuel pipe. The negative pressure fuel pump is connected to an intake manifold arranged in the engine through a negative pressure pipe, so that a negative pressure is formed in the negative pressure fuel pump and it is in an open state to supply oil to the carburetor.

[0006] With the above structural design, by sequentially connecting an electromagnetic valve and a negative pressure fuel pump in series on the fuel pipe connecting the carburetor and the fuel tank, when the engine stops running or is not used for a long time, the electromagnetic valve is powered off, thereby cutting off the connection between the fuel tank and the carburetor. At the same time, the negative pressure fuel pump also loses negative pressure and stops working, stopping the oil supply to the carburetor. Therefore, through the above design, it can avoid the situation that fuel enters the carburetor and the cylinder after the engine stops running or is not used for a long time, cut off the fuel flow, and improve the safety of the engine.

[0007] Preferably, the electromagnetic valve is respectively provided with an electromagnetic valve inlet nozzle and an electromagnetic valve outlet nozzle, which are respectively connected to the fuel pipe. The electromagnetic valve is also provided with a control socket, which can be electrically connected to a power supply arranged on one side to supply power to the electromagnetic valve.

[0008] With the above structural design, the connection between the power supply and the solenoid valve can cut off the power supply synchronously after the engine stops. The solenoid valve cuts off the oil circuit by means of a return spring, cutting off the passage between the fuel tank and the negative pressure fuel pump.

[0009] Preferably, the negative pressure fuel pump is respectively provided with a fuel pump inlet nozzle and a fuel pump outlet nozzle, and they are respectively connected to the fuel pipes downstream of the solenoid valve.

[0010] With the above structural design, it is convenient to replace the solenoid valve and the negative pressure fuel pump.

[0011] Preferably, the negative pressure fuel pump is further provided with a negative pressure nozzle, and the negative pressure nozzle is connected to a negative pressure pipe, and the other end of the negative pressure pipe is connected to the intake manifold.

[0012] With the above structural design, the negative pressure fuel pump generates negative pressure through the connected negative pressure pipe and the intake manifold reaches the negative pressure fuel pump. Through the fluctuation of the negative pressure, the check valve inside the negative pressure fuel pump realizes fuel pumping and supplies fuel to the carburetor. On the contrary, when the engine stops or is not used for a long time, the negative pressure fuel pump loses negative pressure and stops working, and it can also serve as one of the switches to cut off the oil circuit, playing a dual-insurance role with the solenoid valve in cutting off the oil circuit.

[0013] Preferably, the fuel tank and the engine are respectively fixedly installed on the mobile rack, the negative pressure fuel pump is fixedly installed on the engine through a first mounting plate, and the solenoid valve is fixedly installed on a second mounting plate provided on the mobile rack.

[0014] With the above structural design, the negative pressure fuel pump and the solenoid valve can be integrated on the engine and the mobile rack, and their stability can be ensured during the moving process.

[0015] Preferably, the fuel tank and the engine are respectively fixed to the upper end and the lower end of the mobile rack by bolts or screws.

[0016] With the above structural design, the fuel tank and the engine are designed with an upper and lower position, which can ensure smooth fuel supply and is convenient for adding fuel at the same time.

[0017] Preferably, the two sides of the negative pressure fuel pump are provided with mounting ears, and the negative pressure fuel pump is fixed to the first mounting plate through bolts passing through the mounting ears; the solenoid valve is provided with a mounting part, and the mounting part of the solenoid valve is fixed to the second mounting plate by screws.

[0018] Compared with the prior art, the beneficial effects of the present utility model are:

[0019] In the present utility model, a solenoid valve and a negative-pressure fuel pump are sequentially connected in series on the fuel pipe connecting the carburetor and the fuel tank. When the engine stops or is not used for a long time, the solenoid valve is de-energized, thereby cutting off the connection between the fuel tank and the carburetor. At the same time, the negative-pressure fuel pump also loses negative pressure and stops working, ceasing to supply fuel to the carburetor, cutting off the fuel circuit, and preventing a small amount of fuel from entering the engine cylinder to cause engine failure. Therefore, the above improvement enhances the safety of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings are used to provide a further understanding of the present utility model and form a part of the description. They are used together with the following detailed implementation manners to explain the present utility model, but do not constitute a limitation to the present utility model. In the drawings:

[0021] Figure 1 is a schematic structural diagram of the present utility model;

[0022] Figure 2 is Figure 1 a schematic structural diagram after hiding the engine and the moving frame in ;

[0023] Figure 3 is Figure 1 a schematic structural diagram of the solenoid valve in ;

[0024] Figure 4 is Figure 1 a schematic structural diagram of the negative-pressure fuel pump in.

[0025] In the figures:

[0026] fuel tank 1, fuel pipe 2, carburetor 3, engine 4, solenoid valve 5, solenoid valve inlet nozzle 5a, solenoid valve outlet nozzle 5b, control socket 5c, mounting part 5d, negative-pressure fuel pump 6, fuel pump inlet nozzle 6a, fuel pump outlet nozzle 6b, negative-pressure nozzle 6c, mounting ear 6d, negative-pressure pipe 7, intake manifold 8, moving frame 9, first mounting plate 10, second mounting plate 11, buffer member 12. DETAILED IMPLEMENTATION MANNERS

[0027] To describe in detail the technical content, structural features, achieved objectives, and effects of the present utility model, the following is a detailed description in combination with the implementation manners and the accompanying drawings.

[0028] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying 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 construed as a limitation of the present utility model.

[0029] Please refer to Figure 1 and 2 , a general power automatic switch oil circuit, including a fuel tank 1 and a carburetor 3 connected to the fuel tank 1 through a fuel pipe 2. The carburetor 3 is arranged in the engine 4 to atomize the fuel and supply oil. The oil supply principle of the carburetor 3 is a conventional technology in the art and will not be elaborated here. The fuel tank 1 and the engine 4 are respectively fixedly installed on the mobile frame 9. The general power of this application can be applied to agricultural machinery products and is integrated on the mobile frame 9 for easy movement and use. A solenoid valve 5 and a negative pressure fuel pump 6 are sequentially connected in series on the fuel pipe 2. The solenoid valve 5 is used to cut off the oil circuit, and the negative pressure fuel pump 6 is used to pump oil to the carburetor 3. Among them, the solenoid valve 5 is electrically connected to a power supply arranged on the mobile frame ⑨ to supply power to the solenoid valve 5. When the engine 4 starts and stops, the solenoid valve 5 synchronously turns on and off. The negative pressure fuel pump 6 is connected to an intake manifold 8 arranged in the engine through a negative pressure pipe 7, so that a negative pressure is formed in the negative pressure fuel pump 6 and it is in an open state to pump oil to the carburetor 3.

[0030] The specific solution is as follows:

[0031] Please refer to Figure 3 , the solenoid valve 5 is respectively provided with a solenoid valve inlet nozzle 5a and a solenoid valve outlet nozzle 5b, and are respectively connected to the fuel pipe 2. The solenoid valve 5 is also provided with a control socket 5c, which is electrically connected to the power supply to supply power to the solenoid valve 5.

[0032] Please refer to Figure 4 , the negative pressure fuel pump 6 is respectively provided with a fuel pump inlet nozzle 6a and a fuel pump outlet nozzle 6b, and are respectively connected to the fuel pipe 2 downstream of the solenoid valve 5. The negative pressure fuel pump 6 is also provided with a negative pressure nozzle 6c, and the negative pressure nozzle 6c is connected to the negative pressure pipe 7. The other end of the negative pressure pipe 7 is connected to the intake manifold 8.

[0033] Please continue to refer to Figure 1, the negative pressure fuel pump 6 is fixedly installed on the engine 4 through the first mounting plate 10, and the solenoid valve 5 is fixedly installed on the second mounting plate 11 arranged on the moving frame 9. Installation ears 6d are provided on both sides of the negative pressure fuel pump 6, and the negative pressure fuel pump 6 is fixed to the first mounting plate 10 through bolts passing through the installation ears 6d; an installation part 5d is provided on the solenoid valve 5, and the installation part 5d of the solenoid valve 5 is fixedly installed on the second mounting plate 11 through screws. The first mounting plate 10 is fixedly installed on the engine 4 through bolts, and the second mounting plate 11 is fixed to the moving frame 9 by welding.

[0034] In this embodiment, the fuel tank 1 and the engine 4 are respectively fixedly installed at the upper end and the lower end of the moving frame 9 through bolts or screws. The lower end of the engine 4 is fixedly installed at the bottom of the moving frame 9 through a buffer member 12, and there is a certain distance between the bottom of the engine 4 and the bottom of the moving frame 9, which can play a buffering role during the movement.

[0035] The working principle of the present utility model is as follows:

[0036] During operation, the engine 4 starts, and at the same time, the power supply synchronously supplies power to the solenoid valve 5 to open it. The solenoid valve 5 is in an open circuit state, opening the oil circuit. At the same time, the intake manifold 8 generates negative pressure to the negative pressure fuel pump 6. By using the fluctuation of the negative pressure, the diaphragm in the negative pressure fuel pump 6 vibrates, and pumps oil through the two one-way valves in the negative pressure fuel pump 6, pumping the fuel in the fuel tank 1 into the carburetor 3 to supply fuel to the engine 4. When the engine 4 stops or is not used for a long time, the solenoid valve 5 is powered off or has no power, the solenoid valve 5 cuts off the oil circuit, and at the same time, the negative pressure fuel pump also loses negative pressure and stops working, stopping to supply fuel to the carburetor 3. Therefore, in this application, by serially arranging the solenoid valve 5 and the negative pressure fuel pump 6 on the oil circuit, when the engine 4 stops or is not used for a long time, the solenoid valve 5 is powered off, and thus the connection between the fuel tank 1 and the carburetor 3 can be cut off, preventing a small amount of fuel from entering the cylinder of the engine 4 and causing engine failures, thereby improving the use safety of the engine 4.

[0037] According to the disclosure and teachings of the above specification, those skilled in the art to which the present utility model pertains can also make changes and modifications to the above embodiments. Therefore, the present utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present utility model should also fall within the protection scope of the claims of the present utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model. The use of other devices identical or similar to it is within the protection scope of the present utility model.

Claims

1. A general power automatic switch oil circuit, characterized in that, It includes a fuel tank (1) and a carburetor (3) communicated with the fuel tank (1) through a fuel pipe (2). The carburetor (3) is arranged in an engine (4) to atomize fuel and supply fuel. An electromagnetic valve (5) and a negative-pressure fuel pump (6) are sequentially connected in series on the fuel pipe (2). The negative-pressure fuel pump (6) is communicated with an intake manifold (8) arranged in the engine (4) through a negative-pressure pipe (7), so that a negative pressure is formed in the negative-pressure fuel pump (6) and it is in an open state to supply fuel to the carburetor (3).

2. The general power automatic switch oil circuit according to claim 1, characterized in that, An electromagnetic valve inlet nozzle (5a) and an electromagnetic valve outlet nozzle (5b) are respectively arranged on the electromagnetic valve (5) and are respectively connected to the fuel pipe (2). A control socket (5c) is also arranged on the electromagnetic valve (5) and can be electrically connected to a power supply arranged on one side to supply power to the electromagnetic valve (5).

3. The general power automatic switch oil circuit according to claim 1, characterized in that, A fuel pump inlet nozzle (6a) and a fuel pump outlet nozzle (6b) are respectively arranged on the negative-pressure fuel pump (6) and are respectively connected to the fuel pipe (2) downstream of the electromagnetic valve (5).

4. The general power automatic switching oil circuit according to claim 3, wherein, A negative-pressure nozzle (6c) is also arranged on the negative-pressure fuel pump (6), and the negative-pressure nozzle (6c) is connected to the negative-pressure pipe (7). The other end of the negative-pressure pipe (7) is connected to the intake manifold (8).

5. A general power automatic switch oil circuit according to claim 1, characterized in that, The fuel tank (1) and the engine (4) are respectively fixedly installed on a moving frame (9). The negative-pressure fuel pump (6) is fixedly installed on the engine (4) through a first mounting plate (10). The electromagnetic valve (5) is fixedly installed on a second mounting plate (11) arranged on the moving frame (9).

6. A general power automatic switch oil circuit as described in claim 5, characterized in that, The fuel tank (1) and the engine (4) are respectively fixedly installed at the upper end and the lower end of the moving frame (9) through bolts or screws.

7. The general power automatic switch oil circuit according to claim 5, characterized in that, Mounting ears (6d) are arranged on both sides of the negative-pressure fuel pump (6), and the negative-pressure fuel pump (6) is fixed on the first mounting plate (10) through bolts passing through the mounting ears (6d). An installation part (5d) is arranged on the electromagnetic valve (5), and the installation part (5d) of the electromagnetic valve (5) is fixedly installed on the second mounting plate (11) through screws.

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