Engine and generator

Abstract

The utility model discloses an engine which comprises an engine body, an oil-gas mixing device and a fuel tank, the oil-gas mixing device is connected with the fuel tank through a pipeline, and the engine body is connected with the fuel tank through a pipeline. Wherein a conducting piece is arranged between the fuel tank and the oil-gas mixing device, and the conducting piece conducts a pipeline between the oil-gas mixing device and the fuel tank when the engine body operates and cuts off the pipeline between the oil-gas mixing device and the fuel tank when the engine body stops. When the engine body operates, the pipeline between the oil-gas mixing device and the fuel tank is conducted, when the engine body stops, the pipeline between the oil-gas mixing device and the fuel tank is cut off by the conducting piece, fuel in the fuel tank does not enter the oil-gas mixing device any more, and therefore the situation that the oil-gas mixing device is too much in stored oil is avoided; and normal operation of oil-gas mixing operation is ensured. The utility model further provides a generator comprising the engine.

Description

Technical Field

[0001] The utility model relates to an engine, in particular to an engine and a generator capable of switching the conduction state of a pipeline between an oil-gas mixing device and a fuel tank. Background Art

[0002] An engine is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines, external combustion engines, jet engines, electric motors, etc. In the field of general machinery, in order to pursue higher cost performance, the carburetors of engines generally adopt float-type carburetors; however, during the vibration of the engine / generator set during transportation, due to the bumpy road, the float-type structure will also intermittently open and close the needle valve, posing the risk of fuel leakage during transportation.

[0003] To solve the problem of fuel leakage during driving, the existing solutions are: 1. Require users to manually turn off the fuel switch during transportation, which brings inconvenience to the vehicle-mounted use of the product and also has the risk of users forgetting; 2. Use electronic injection, which increases the cost a lot and is not cost-effective for general-purpose products, which is not conducive to the popularization of the product; 3. Use a normally closed solenoid valve switch to switch the fuel inlet, which also increases costs to a certain extent and is currently used in large quantities; 4. Use a negative pressure switch to control the fuel switch. This solution currently has the highest cost-effectiveness, but the difficulty of starting without oil restricts the popularization of the product.

[0004] Chinese patent document CN208651001U discloses an intelligent oil-intake carburetor, including: a fuel storage chamber, the fuel storage chamber is connected to an oil pipe; a step groove, the step groove has an oil inlet and an oil outlet, the oil inlet is connected to the fuel storage chamber, a diaphragm, the diaphragm is slidably connected to the step groove between a first position and a second position, the diaphragm is attached to the step groove in the first position and closes the oil inlet, and the diaphragm is separated from the step groove in the second position and opens the oil inlet; an oil inlet channel, one end of the oil inlet channel is connected to the oil outlet, and the other end is connected to the needle valve seat, and the needle valve seat is connected to the inner cavity of the float chamber; a diaphragm spring and a negative pressure cover, the negative pressure cover is arranged above the diaphragm, it has a process straight hole, the process straight hole is connected to the air pressure process hole of the engine's air inlet, and the diaphragm spring is arranged between the negative pressure cover and the diaphragm. In this prior art, the intelligent supply of fuel in the fuel tank is realized as the engine works, avoiding the mechanical movement of components such as the oil inlet switch that needs to be manually operated when the engine works or does not work. However, before using the carburetor, the user needs to manually push the handle to open the diaphragm before subsequent use, which is inconvenient to operate. Utility Model Content

[0005] In order to solve the technical problem in the prior art that a carburetor needs to manually push a handle first, which causes inconvenience in operation, the utility model provides an engine, comprising an engine body, an oil-gas mixing device and a fuel tank, wherein the oil-gas mixing device and the fuel tank, as well as the engine body and the fuel tank, are respectively connected via pipelines; wherein: a conducting member is provided between the fuel tank and the oil-gas mixing device, the conducting member conducts the pipeline between the oil-gas mixing device and the fuel tank when the engine body is running, and cuts off the pipeline between the oil-gas mixing device and the fuel tank when the engine body is stopped.

[0006] In this solution, the conducting member is used to conduct the pipeline between the oil-gas mixing device and the fuel tank when the engine body is running, so that the fuel in the fuel tank enters the oil-gas mixing device for use by the engine body. When the engine body is stopped, the conducting member cuts off the pipeline between the oil-gas mixing device and the fuel tank, and the fuel in the fuel tank no longer enters the oil-gas mixing device, so as to avoid excessive oil storage in the oil-gas mixing device and ensure the normal operation of the oil-gas mixing operation. Compared with the prior art, there is no need to manually operate the conducting member, and the operation is more convenient.

[0007] Preferably, the conducting member includes a needle valve and a driving assembly, one end of the needle valve extends into the pipeline between the oil-gas mixing device and the fuel tank, and the driving assembly drives the needle valve to move in the direction of pulling out of the pipeline when the engine body is running, and drives the needle valve to move in the direction of penetrating into the pipeline when the engine body is stopped. In this solution, the driving assembly is used to drive the needle valve to cut off and conduct the pipeline, which has a simple structure and can reduce the cost of the engine.

[0008] Preferably, the driving assembly includes a diaphragm and a diaphragm pressure chamber. When the engine body is running, the diaphragm pressure chamber drives the diaphragm to drive the needle valve to move in the direction of pulling out the pipeline. When the engine body is stopped, the diaphragm pressure chamber drives the diaphragm to drive the needle valve to move in the direction of penetrating the pipeline. In this solution, the needle valve is driven by the cooperation of the diaphragm and the diaphragm pressure chamber to achieve pipeline cutting and conduction. The structure is simple and the cost of the engine is reduced.

[0009] Preferably, the diaphragm pressure chamber is connected to a pressure tube, and the other end of the pressure tube is connected to the air inlet of the engine body. In this solution, when the pressure tube is connected to the air inlet of the engine body, when the engine body is running, negative pressure appears at the air inlet of the engine body and is transmitted to the diaphragm pressure chamber through the pressure tube, so that negative pressure appears in the diaphragm pressure chamber, and the diaphragm is driven to drive the needle valve to move in the direction of pulling out the pipeline, so that the pipeline between the oil-gas mixing device and the fuel tank is connected; when the engine body is shut down, the diaphragm pressure chamber returns to normal, and the diaphragm is driven to drive the needle valve to move in the direction of going deep into the pipeline, cutting off the pipeline between the oil-gas mixing device and the fuel tank. The structure is simple and the cost of the engine is reduced.

[0010] Preferably, the conducting member is in a normally closed state. This solution can prevent excessive oil storage in the oil-gas mixing device and ensure the normal operation of the engine body.

[0011] Preferably, the fuel tank is connected to the main air volume hole of the oil-gas mixing device through the oil inlet pipe. This solution realizes the connection between the fuel tank and the oil-gas mixing device, has a simple structure, and reduces the cost of the engine.

[0012] In a second aspect, the utility model provides a generator including the above-mentioned engine.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model conducts the pipeline between the oil-gas mixing device and the fuel tank when the engine body is running, and the conducting part cuts off the pipeline between the oil-gas mixing device and the fuel tank when the engine body is stopped, so that the fuel in the fuel tank no longer enters the oil-gas mixing device, thereby avoiding excessive oil storage in the oil-gas mixing device and ensuring the normal operation of the oil-gas mixing operation. Compared with the prior art, there is no need to manually operate the conducting part, and the operation is more convenient.

[0015] 2. The utility model utilizes the pressure tube, the diaphragm, the diaphragm pressure chamber and the cooperation of the needle valve to drive the needle valve, has a simple structure and can reduce the cost of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the partial structure of an engine in an engine and generator embodiment. DETAILED DESCRIPTION

[0017] The following is further described in detail through specific implementation methods:

[0018] 1. Definition

[0019] Oil-gas mixing device: refers to the carburetor, which is a mechanical device that mixes a certain proportion of gasoline and air under the vacuum generated by the engine, and uses the kinetic energy of the inhaled air flow to achieve gasoline atomization. A simple carburetor consists of three parts: the upper, middle and lower parts. The upper part has an air inlet and a float chamber, the middle part has a throat, a metering hole and a nozzle, and the lower part has a throttle, etc. The float chamber is a rectangular container that stores gasoline from the gasoline pump. There is a float in the container that controls the amount of oil inflow using the oil level. The oil inlet at one end of the nozzle in the middle is connected to the metering hole of the float chamber, and the oil outlet at the other end is at the throat of the throat.

[0020] Fuel tank: A tank used to store fuel.

[0021] Needle valve: a fine-tuning valve with a needle-shaped valve plug, mainly used to adjust the gas flow.

[0022] Diaphragm: A circular elastic sensitive element. When the two sides of the diaphragm are subjected to different pressures (or forces), the diaphragm will strain and move toward the side with lower pressure, causing its center to move in a certain relationship with the pressure difference.

[0023] 2. The reference numerals in the drawings of the specification include: fuel tank 1, fuel inlet pipe 2, guide member 3, diaphragm pressure chamber 31, diaphragm 32, needle valve 33, oil-gas mixing device 4, main air volume hole 5, engine body air intake 6.

[0024] The arrow direction in the figure indicates the passage at the oil-gas mixing device during negative pressure suction when the engine body is running, and the dotted line indicates the pressure pipe.

[0025] The embodiment is basically as shown in the attached Figure 1 As shown: an engine, comprising an engine body, an oil-gas mixing device 4 and a fuel tank 1, the oil-gas mixing device 4 and the fuel tank 1 are connected via pipelines, and the fuel tank 1 is connected via an oil inlet pipe 2 to a main air volume hole 5 of the oil-gas mixing device 4. A conducting member 3 is provided between the fuel tank 1 and the oil-gas mixing device 4, the conducting member 3 conducts the oil inlet pipe 2 between the oil-gas mixing device 4 and the fuel tank 1 when the engine body is running, and cuts off the oil inlet pipe 2 between the oil-gas mixing device 4 and the fuel tank 1 when the engine body is stopped.

[0026] The above-mentioned conducting member 3 is in a normally closed state, and includes a needle valve 33 and a driving assembly. One end of the needle valve 33 extends into the oil inlet pipe 2 between the oil-gas mixing device 4 and the fuel tank 1, wherein the driving assembly includes a diaphragm 32 and a diaphragm pressure chamber 31. The diaphragm pressure chamber 31 is connected to a pressure pipe, and the other end of the pressure pipe is connected to the engine body air inlet 6. When the engine body is running, the diaphragm pressure chamber 31 drives the diaphragm 32 to drive the needle valve 33 to move in the direction of pulling out the oil inlet pipe 2. When the engine body is stopped, the diaphragm pressure chamber 31 drives the diaphragm 32 to drive the needle valve 33 to move in the direction of deepening into the oil inlet pipe 2.

[0027] This embodiment also discloses a generator including the above engine.

[0028] The specific implementation process is as follows: In this embodiment, the conducting member 3 is in a normally closed state, that is, the conducting member 3 is in a closed state under normal conditions, and the needle valve 33 extends into the oil inlet pipe 2 to cut off the oil inlet pipe 2. When the engine body is running, the engine body air inlet 6 inhales air to generate negative pressure. Since the diaphragm pressure chamber 31 is connected to the engine body through the pressure pipe, the diaphragm pressure chamber 31 will also generate negative pressure, driving the diaphragm 32 to drive the needle valve 33 to move in the direction of pulling out the oil inlet pipe 2, so that the oil inlet pipe 2 is connected, and the fuel in the fuel tank 1 flows into the oil-gas mixing device 4 through the oil inlet pipe 2, thereby continuously supplying oil to the oil-gas mixing device 4. When the engine body is stopped, since the engine body air inlet 6 no longer inhales air, there is no negative pressure in the diaphragm pressure chamber 31, and the diaphragm 32 drives the needle valve 33 to move in the direction of extending into the oil inlet pipe 2 to cut off the conduction of the oil inlet pipe 2, and stop the oil inlet of the oil-gas mixing device 4.

[0029] The above is only an embodiment of the utility model. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, which will not affect the effect of the implementation of the utility model and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. An engine, comprising an engine body, an oil-gas mixing device and a fuel tank, wherein the oil-gas mixing device and the fuel tank, and the engine body and the fuel tank are respectively connected through pipelines; characterized in that: A conducting member is provided between the fuel tank and the oil-gas mixing device, and the conducting member conducts the pipeline between the oil-gas mixing device and the fuel tank when the engine body is running, and cuts off the pipeline between the oil-gas mixing device and the fuel tank when the engine body is stopped.

2. The engine according to claim 1, characterized in that: The conducting member includes a needle valve and a driving assembly, one end of the needle valve extends into the pipeline between the oil-gas mixing device and the fuel tank, and when the engine body is running, the driving assembly drives the needle valve to move in the direction of pulling out of the pipeline, and when the engine body is stopped, the driving assembly drives the needle valve to move in the direction of penetrating into the pipeline.

3. The engine according to claim 2, characterized in that: The driving assembly includes a diaphragm and a diaphragm pressure chamber. When the engine body is running, the diaphragm pressure chamber drives the diaphragm to drive the needle valve to move in the direction of pulling out the pipeline. When the engine body is stopped, the diaphragm pressure chamber drives the diaphragm to drive the needle valve to move in the direction of penetrating into the pipeline.

4. The engine according to claim 3, characterized in that: The diaphragm pressure chamber is connected with a pressure pipe, and the other end of the pressure pipe is connected to the air inlet of the engine body.

5. The engine according to any one of claims 1 to 4, characterized in that: The conducting element is in a normally closed state.

6. The engine according to claim 5, characterized in that: The fuel tank is communicated with the main air volume hole of the oil-gas mixing device through an oil inlet pipe.

7. A generator, characterized in that: Comprising an engine as described in any one of claims 1-6.

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