CN205478019U - Fire regulator of oil filter assembly - Google Patents

Abstract

The utility model discloses a fire regulator of oil filter assembly, including base (3) the bolt that produces oil (4) are equipped with on the base, be equipped with on the bolt that should produce oil above that the portion oil outlet (5) and in draining hole (6) of its lower part, produce oil on the bolt and be equipped with pressure -regulating valve assembly (7) in its draining hole department. The utility model discloses fuel after enabling to filter gets into pressure -regulating valve assembly through the draining hole of the bolt that produces oil. When this fuel pressure reached or exceed pressure -regulating valve assembly's design pressure, pressure -regulating valve assembly work made the fuel fuel tank that flows back to it obtains fine release to use the oil head. When oil circuit pressure is less than the pressure of pressure -regulating valve assembly settlement, pressure -regulating valve assembly self -closing. Thereby eliminated the potential safety hazard of oil circuit, effectively protected engine fuel oil system.

Description

Pressure regulating device of fuel filter assembly

technical field

The invention relates to a filter, in particular to a fuel filter assembly.

Background technique

At present, the fuel filter assembly used in automobiles and ships includes a fuel filter, a reversing valve, and a base. Under normal operating conditions, the fuel is filtered through the fuel filter and then enters the combustion chamber through the engine pump valve. When the engine pump valve is abnormal and cannot be opened or is difficult to open, the filtered fuel cannot enter the combustion chamber in a normal state, and the pressure of the oil outlet circuit cannot be released, and the oil pressure will increase. If it is high, it will bring great safety hazards to the engine fuel system components.

Contents of the invention

The purpose of the present invention is to overcome the above disadvantages, and provide a pressure regulating device of the fuel filter assembly which realizes the pressure release of the oil circuit during the process of filtering out the fuel.

The purpose of the present invention is achieved through the following technical solutions: the pressure regulating device of the fuel filter assembly includes a base, and an oil outlet bolt is installed on the base, and the oil outlet bolt is provided with an oil outlet on its upper part. hole and the oil drain hole at its lower part; a pressure regulating valve assembly is installed on the oil outlet bolt and at its oil drain hole.

The pressure regulating valve assembly includes a pressure regulating valve body and a casing. An oil return bolt is installed on the pressure regulating valve body, and a piston is installed in the casing. The piston is connected to a stud through a return spring. There is an oil outlet of the casing on the top and at the piston, and there is an oil return passage communicating between the casing, the pressure regulating valve body and the oil return bolt.

After adopting the present invention, when the pressure of the entire fuel oil circuit or the engine pump valve is abnormal (such as blockage), the filtered fuel oil enters the pressure regulating valve assembly through the oil drain hole of the oil outlet bolt. When the fuel pressure reaches or exceeds the design pressure of the pressure regulating valve assembly, the piston of the pressure regulating valve assembly pushes and compresses the return spring, and the fuel flows back to the The fuel tank, so that the oil outlet pressure is well released. When the pressure in the oil circuit is lower than the set pressure of the pressure regulating valve assembly, the pressure regulating valve assembly is automatically closed. Thereby eliminating the potential safety hazard of the oil circuit and effectively protecting the engine fuel system.

Description of drawings

Fig. 1 is a schematic diagram of the installation structure of the present invention applied to a pressure regulating fuel filter assembly.

FIG. 2 is a side view of FIG. 1 .

Fig. 3 is a structural schematic diagram of the present invention.

detailed description

The present invention will be described in further detail below with reference to the drawings and embodiments.

Referring to Fig. 1 to Fig. 3, the pressure regulating device of the fuel filter assembly of the present invention includes a base 3, and an oil outlet bolt 4 is installed on the base 3, and the oil outlet bolt 4 is provided with a The oil outlet hole 5 and the oil drain hole 6 at its lower part; on the oil outlet bolt 4 and at its oil drain hole 6, a pressure regulating valve assembly 7 is installed. The pressure regulating valve assembly 7 includes a pressure regulating valve body 8 and a casing 10. An oil return bolt 9 is installed on the pressure regulating valve body 8, and a piston 11 is installed in the casing 10. The piston 11 passes through a return spring 12 Connected with the stud 13 (which is nested by a nut 19), the casing 10 and the piston 11 are provided with a casing oil outlet 14, the casing 10, the pressure regulating valve body 8, and the oil return bolt 9 There is an oil return passage 15 communicating with each other. The pressure regulating fuel filter assembly applied in the present invention also includes a fuel filter 1 (left and right), a reversing valve 2, and the reversing valve 2 is installed on the base 3, and the base 3 Install it on the fuel filter 1 (at its oil outlet).

Wherein, in the base 3, there are (matched with the oil outlet of the fuel filter) a fuel filter oil outlet channel 16 and a reversing port 17 (matched with the reversing valve). Also be provided with (matched with the oil inlet of fuel filter) fuel oil inlet 18 on the top, described oil outlet bolt 4 is at the top of the reversing port 17 of this base 3. The oil outlet bolt 4 is connected to the oil outlet pipeline joint 20 through its oil outlet hole 5 , and the oil return bolt 9 is connected to the oil return pipeline joint 22 through its oil return hole 21 .

As shown in the accompanying drawings, the working principle of the present invention is: firstly, after the fuel is filtered through the fuel filter, it passes through the oil outlet of the fuel filter, the fuel oil filter outlet channel 16, and the valve matched with the reversing valve. The reversing port 17 enters the oil outlet bolt. Under normal circumstances, fuel oil enters the combustion chamber by the oil outlet pipe joint (engine pump valve effect) through the oil outlet hole 5 of the oil outlet bolt. Through the reversing action of the reversing valve, the fuel filter on the left or right side works, and when there is a problem with the fuel filter on one side, it can be replaced at any time to realize uninterrupted fuel supply.

When the pressure of the whole oil circuit or the engine pump valve is abnormal (such as blockage) and cannot be opened or is difficult to open, the filtered fuel will enter the pressure regulating valve assembly 7 through the drain hole 6 of the oil outlet bolt. When the fuel pressure reaches or exceeds the design pressure of the pressure regulating valve assembly, the piston 11 of the pressure regulating valve assembly moves to the right, so that the return spring 12 is pushed and compressed, and the fuel passes through the oil return passage from the oil outlet 14 of the casing 15. The oil return hole 21 of the oil return bolt 9 and the oil return line joint return to the fuel tank, so that the oil outlet pressure is well released. When the pressure in the oil circuit is lower than the set pressure of the pressure regulating valve assembly, under the return action of the return spring, the piston moves to the left and the pressure regulating valve assembly is automatically closed. So as to achieve the purpose of protecting the fuel system. The invention is applied to engine systems of automobiles, ships and the like.

Claims (3)

1. The pressure regulating device of the fuel filter assembly, including a base (3), characterized in that an oil outlet bolt (4) is installed on the base (3), and the oil outlet bolt (4) is provided with There is an oil outlet hole (5) on its upper part and an oil drain hole (6) on its lower part; a pressure regulating valve assembly is installed on the oil outlet bolt (4) and at its oil outlet hole (6) (7). 2. The pressure regulating device of the fuel filter assembly according to claim 1, characterized in that: the pressure regulating valve assembly (7) includes a pressure regulating valve body (8) and a housing (10), and in the The pressure regulating valve body (8) is equipped with an oil return bolt (9), and a piston (11) is installed in the casing (10), and the piston (11) is connected to the stud (13) through a return spring (12) , on the casing (10) and at the piston (11) there is a casing oil outlet (14), between the casing (10), the pressure regulating valve body (8) and the oil return bolt (9) there is Intercommunicating oil return channels (15). 3. The pressure regulating device of the fuel filter assembly according to claim 2, characterized in that: a fuel filter outlet passage (16), a reversing port (17) are provided in the base (3) , the base (3) is also provided with a fuel oil inlet (18), and the oil outlet bolt (4) is above the reversing port (17) of the base (3).