CN210599231U

CN210599231U - Forklift fuel system

Info

Publication number: CN210599231U
Application number: CN201921307727.9U
Authority: CN
Inventors: 赵娟娟; 王平; 张冬林; 高成柱
Original assignee: Anhui Heli Co Ltd
Current assignee: Anhui Heli Co Ltd
Priority date: 2019-08-13
Filing date: 2019-08-13
Publication date: 2020-05-22
Anticipated expiration: 2029-08-13

Abstract

The utility model discloses a fuel system of a forklift truck, which comprises an oil supply pipeline and an oil return pipeline which are communicated with an oil tank; the fuel supply pipeline comprises an oil-water separator and a fuel fine filter which are sequentially connected along the fuel flowing direction, the oil-water separator is communicated with a forklift fuel tank, an oil outlet of the oil-water separator is connected with an oil inlet of the fuel fine filter, a fuel delivery pump is communicated between the oil-water separator and the fuel fine filter, and an oil outlet of the fuel fine filter is communicated with an engine fuel delivery pump system; this application is equipped with the fuel fine filtration between oil-water separator and engine oil delivery pump system to oil inlet department at the fuel fine filtration is equipped with independent fuel delivery pump, at the initial stage of engine start, pumps into the fuel through fuel delivery pump from the fuel tank, therefore at the start-up, when the engine fuel delivery pump is pumping the fuel from the fuel fine filtration, can guarantee can not appear the fuel fine filtration and inhale empty, guarantees the stability of fuel supply.

Description

Forklift fuel system

Technical Field

The utility model relates to a fork truck fuel oil supply pipeline equipment field specifically is a fork truck fuel oil system.

Background

At present, with the continuous upgrade of the emission regulations of internal combustion engines at home and abroad, the fuel systems of the internal combustion engines are upgraded to high-pressure common rail injection systems of Electronic Control Units (ECUs), and the combustion and the emission of the fuel systems become key factors influencing the sales volume of the internal combustion forklift. In order to ensure that the internal combustion engine can be successfully started quickly under the low-temperature and low-speed starting state and prevent the fuel pipeline from being vacuumed, the fuel system of the forklift truck with the electronic fuel delivery pump and the fuel oil fine filter belt oil return is designed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a fork truck fuel oil system to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a fuel system of a forklift comprises an oil supply pipeline and an oil return pipeline which are communicated with an oil tank;

the fuel supply pipeline comprises an oil-water separator and a fuel fine filter which are sequentially connected along the fuel flowing direction, the oil-water separator is communicated with a forklift fuel tank, an oil outlet of the oil-water separator is connected with an oil inlet of the fuel fine filter, a fuel delivery pump is communicated between the oil-water separator and the fuel fine filter, and an oil outlet of the fuel fine filter is communicated with an engine fuel delivery pump system;

the oil return pipeline comprises a fuel fine filtering oil return pipeline and an engine oil return pipeline, the fuel fine filtering oil return pipeline comprises a fine filtering oil return pipe connected to an oil return port of the fuel fine filtering, the fine filtering oil return pipe is communicated with a forklift oil tank, and a one-way valve is arranged on the fine filtering oil return pipe.

As a further aspect of the present invention: the oil-water separator is communicated with the forklift oil tank through a separator oil inlet pipe.

As a further aspect of the present invention: and an oil inlet of the fuel fine filter is communicated with an oil outlet of the oil-water separator through a fine filter oil inlet pipe.

As a further aspect of the present invention: the oil transfer pump is fixedly connected to the fine filtering oil inlet pipe.

As a further aspect of the present invention: an oil outlet of the fuel fine filter is connected with an engine oil delivery pipe, and the engine oil delivery pipe is communicated with an engine oil delivery pump system.

As a further aspect of the present invention: the engine oil return pipeline comprises an engine oil return pipe communicated with an oil return port of an engine oil transfer pump, and an oil outlet of the engine oil return pipe is communicated with a forklift oil tank.

As a further aspect of the present invention: the oil outlet of the fine filtering oil return pipe and the oil return port of the engine oil return pipe are connected with an oil return header pipe through a tee joint, and the oil outlet of the oil return header pipe is communicated with a forklift oil tank.

As a further aspect of the present invention: the fuel fine filter and the fuel delivery pump are fixedly connected through a mounting bracket, and a mounting hole is formed in the mounting bracket.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the fuel oil fine filter is arranged between the oil-water separator and the engine fuel delivery pump system, the independent fuel delivery pump is arranged at an oil inlet of the fuel oil fine filter, and fuel oil is pumped from the fuel tank through the fuel delivery pump at the initial stage of starting the engine, so that when the engine fuel delivery pump which is started initially pumps fuel oil from the fuel oil fine filter, the phenomenon of fuel oil fine filter suction empty can be avoided, the stability of fuel oil supply is ensured, and meanwhile, the low-speed starting capability is provided for the diesel engine;

2. this application is equipped with the check valve through the time oil return pipeline that filters at the fuel essence, makes the fuel can only filter the oil return opening to fork truck oil tank direction from the fuel essence through the check valve and flows, and then the effectual high temperature fuel of having guaranteed that engine oil return pipeline backward flow can not flow in the fuel essence, has guaranteed engine oil feeding system's fuel temperature, has improved the temperature nature of fuel feeding pipeline.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is a schematic view of the fuel flow direction of the present embodiment;

FIG. 3 is a schematic diagram of the connection between the fuel fine filter and the fuel delivery pump according to the present embodiment.

In the figure: 1-oil-water separator, 2-separator oil inlet pipe, 3-fuel fine filtration, 4-fine filtration oil inlet pipe, 5-oil transfer pump, 6-engine oil delivery pipe, 7-fine filtration oil return pipe, 8-one-way valve, 9-mounting bracket, 10-tee joint, 11-engine oil return pipe and 12-oil return header pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, in an embodiment of the present invention, a fuel system of a forklift includes an oil supply pipeline and an oil return pipeline.

The oil supply pipeline comprises a separator oil inlet pipe 2, an oil-water separator 1, a fine filter oil inlet pipe 3, an oil transfer pump 5, a fuel fine filter 3 and an engine oil transfer pipe 6 which are connected in sequence, the separator oil inlet pipe 2 is communicated with a forklift oil tank, the oil transfer pump 5 is positioned between the oil-water separator 1 and the fuel fine filter 3, an oil inlet of the oil-water separator 1 is communicated with an oil outlet of the separator oil inlet pipe 2, an oil outlet of the oil-water separator 1 is communicated with an oil inlet of the oil transfer pump 5, an oil outlet of the oil transfer pump 5 is communicated with an oil inlet of the fuel fine filter 3, an oil outlet of the fine filter 3 is communicated with the engine oil transfer pipe 6, the engine oil transfer pipe 6 is communicated with the engine oil transfer pump system, in the use process, the oil transfer pump 5 is started, fuel is pumped into the oil-water separator 1 through the forklift oil tank and the separator oil inlet pipe 2 by the oil, the separated fuel oil is pumped into a fuel oil fine filter 3 through a fine filter oil inlet pipe 4 and a fuel delivery pump 5, the fuel oil is filtered, and the filtered fuel oil is pumped into an engine through an engine oil supply pump system;

the oil return pipeline comprises a fine filtering oil return pipeline and an engine oil return pipeline, the fine filtering oil return pipeline comprises a fine filtering oil return pipe 7 communicated with an oil return port of the fuel fine filtering 3, the fine filtering oil return pipe 7 is connected with a one-way valve 8, and further the fine filtering oil return pipe 7 is ensured to be communicated to a forklift oil tank in a one-way mode through the fuel fine filtering 3 through the one-way valve 8, the engine oil return pipeline comprises an engine oil return pipe 11 communicated with an oil return pipe of an engine oil transmission pump system, an oil outlet of the fine filtering oil return pipe 7 and an oil outlet of the engine oil return pipe 11 are connected with an oil return header pipe 12 through a tee joint 10, and an oil outlet;

the fuel delivery pump 5 and the fuel fine filter 3 are fixedly connected through a mounting bracket 9, a mounting hole used for being connected with a forklift body is formed in the mounting bracket 9, and then the mounting bracket 9 and the forklift body can be fixedly connected through the mounting hole in the mounting bracket 9.

When the utility model is used, when the engine is started, the oil transfer pump 5 is synchronously started, and then the oil supply pipeline can be communicated, fuel is pumped into the oil-water separator 1 through the oil transfer pump 5 through the forklift oil tank, the separator oil inlet pipe 2, and the oil-water separation is carried out on the fuel through the oil-water separator 1, the separated fuel is pumped into the fuel fine filter 3 through the fine filter oil inlet pipe 4, the oil transfer pump 5 and the fuel fine filter 3, and the filtered fuel is pumped into the engine through the engine oil supply pump system, because in the initial stage of starting, the fuel is pumped into the fuel fine filter 3 through the oil transfer pump 5, when the oil pump in the engine oil transfer system is started, the fuel can be effectively pumped out from the fuel fine filter 3, thereby the phenomenon of fine filter of the fuel can be effectively prevented, the starting stability of the engine and the stability of fuel supply are ensured, when the engine does not work, the fuel pumped into the fuel fine filter 3 flows back to the forklift oil tank through the oil return port of the fuel fine filter 3, the fine filter oil return pipe 7 and the one-way valve 8, so that the stability of the oil pressure of an oil supply pipeline is ensured, the oil supply pipeline is protected, and the pipe loss is reduced; in addition, in the using process, the one-way valve 8 can also effectively prevent high-temperature fuel in the engine oil return pipe 11 and high-temperature fuel in the fine filtering oil return pipe 7 from flowing back to the fuel fine filtering 3, and the oil supply temperature of the engine is effectively ensured.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A fuel system of a forklift is characterized by comprising an oil supply pipeline and an oil return pipeline which are communicated with an oil tank;

the fuel supply pipeline comprises an oil-water separator (1) and a fuel fine filter (3) which are sequentially connected along the fuel circulation direction, the oil-water separator (1) is communicated with a forklift fuel tank, an oil outlet of the oil-water separator (1) is connected with an oil inlet of the fuel fine filter (3), a fuel delivery pump is communicated between the oil-water separator (1) and the fuel fine filter (3), and an oil outlet of the fuel fine filter (3) is communicated with an engine fuel delivery pump system;

the oil return pipeline comprises a fuel fine filtering oil return pipeline and an engine oil return pipeline, the fuel fine filtering oil return pipeline comprises a fine filtering oil return pipe (7) connected to an oil return port of the fuel fine filtering pipe (3), the fine filtering oil return pipe (7) is communicated with a forklift oil tank, and a one-way valve (8) is arranged on the fine filtering oil return pipe (7).

2. A fuel system for a forklift truck as claimed in claim 1, wherein said oil-water separator (1) is in communication with the fuel tank of the forklift truck through a separator oil inlet pipe (2).

3. The fuel system of the forklift truck as recited in claim 1, wherein an oil inlet of the fuel fine filter (3) is communicated with an oil outlet of the oil-water separator (1) through a fine filter oil inlet pipe (4).

4. A fuel system for a fork lift truck as claimed in claim 3, characterized in that said fuel delivery pump (5) is fixedly connected to the fine filter inlet pipe (4).

5. The fuel system of the forklift truck as recited in claim 1, wherein an oil outlet of the fuel fine filter (3) is connected with an engine oil delivery pipe (6), and the engine oil delivery pipe (6) is communicated with an engine oil delivery pump system.

6. A forklift fuel system as claimed in claim 1, wherein said engine return line comprises an engine return pipe (11) communicating with an engine fuel feed pump return, an oil outlet of said engine return pipe (11) communicating with a forklift fuel tank.

7. The fuel system of the forklift truck as recited in claim 6, characterized in that the oil outlet of the fine filtration return pipe (7) and the oil return port of the engine return pipe (11) are connected with an oil return main pipe (12) through a tee joint (10), and the oil outlet of the oil return main pipe (12) is communicated with a fuel tank of the forklift truck.

8. The fuel system of the forklift truck as recited in claim 1, characterized in that said fine fuel filter (3) is fixedly connected to said fuel delivery pump (5) via a mounting bracket (9), said mounting bracket (9) being provided with mounting holes.