CN205559131U - Oil filter assembly is fired to pressure regulating formula - Google Patents

Abstract

The utility model discloses a pressure-regulating fuel filter assembly, which comprises a fuel filter (1) and a reversing valve (2). An oil outlet bolt (4), which is provided with an oil outlet hole (5) and an oil drain hole (6); a pressure regulating valve assembly (7) is installed on the oil outlet bolt and at the oil outlet hole ). The utility model can make the filtered fuel oil enter 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 pressure regulating valve assembly works to make the fuel flow back 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, 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

Pressure regulating 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 and a reversing valve. Under normal working conditions, the fuel is filtered by 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-mentioned disadvantages, and provide a pressure-regulating fuel filter assembly that realizes the pressure release of the oil circuit for filtering the oil out of the fuel.

The purpose of the present invention is achieved through the following technical solutions: the pressure-regulating fuel filter assembly includes a fuel filter and a reversing valve, and an oil outlet bolt is installed on the fuel filter through a base. An oil outlet hole and an oil drain hole are arranged on the oil outlet bolt; a pressure regulating valve assembly is installed on the oil outlet bolt and at the oil outlet hole; the pressure regulating valve assembly includes a pressure regulating valve body and a shell, The body of the pressure regulating valve is equipped with an oil return bolt, and a piston is installed in the casing, and the piston is connected to the stud through a return spring. On the casing and at the piston, there is an oil outlet of the casing. The shell, pressure regulating valve body, and oil return bolt have an oil return channel that communicates with each other; in the base, there is a fuel filter oil outlet channel that matches the oil outlet of the fuel filter, and a fuel oil outlet channel that matches the reversing valve. The matching reversing port is also provided with a fuel oil inlet matching the fuel oil inlet of the fuel filter on the base; the oil outlet bolt is above the reversing port of the base, and the outlet The oil bolt is connected with the oil outlet pipeline joint through its oil outlet hole, and the oil return bolt is connected with the oil return pipeline joint through its oil outlet hole.

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 structural schematic diagram of the pressure-regulating fuel filter assembly of the present invention.

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

Fig. 3 is a structural schematic diagram of the connection between the base, the oil outlet bolt and the pressure regulating valve assembly in Fig. 1 .

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, it can be seen that the pressure-regulating fuel filter assembly of the present invention includes a fuel filter 1 (left and right), a reversing valve 2, and the fuel filter 1 (its The oil outlet) is equipped with an oil outlet bolt 4 through the base 3 (the reversing valve 2 is installed on the base 3), and the oil outlet bolt 4 is provided with an oil outlet hole 5 (in the upper part) and (in the The lower part) drain hole 6; on the oil outlet bolt 4, a pressure regulating valve assembly 7 is installed at its drain hole 6.

As shown in Figure 3, 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 is connected with the stud 13 (outside of which is sleeved by a nut 19) through the return spring 12. On the casing 10 and at the piston 11, a casing oil outlet 14 is provided. The casing 10, the pressure regulating valve body 8. There is an oil return channel 15 communicating between the oil return bolts 9 .

Wherein, in the base 3, there is a fuel filter oil outlet passage 16 matching with the oil outlet of the fuel filter, a reversing port 17 matching with the reversing valve, and the base 3 is also provided with The fuel oil inlet 18 matched with the oil inlet of the fuel filter. The oil outlet bolt 4 is above the reversing port 17 of the 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 (1)

1. pressure-adjusting type fuel filter assembly, including fuel filter (1), reversal valve (2), it is characterized in that: by pedestal (3) equipped with going out oil draining bolt (4) on described fuel filter (1), this goes out oil draining bolt (4) and is provided with oil outlet (5) and oil leak hole (6)；Described go out oil draining bolt (4) upper and at its oil leak hole (6) place equipped with valve module of voltage regulation (7)；Described valve module of voltage regulation (7) includes pressure regulator valve body (8), shell (10), equipped with oil return bolt (9) on described pressure regulator valve body (8), at described shell (10) built with piston (11), this piston (11) is connected with stud (13) by return spring (12), above and it is provided with shell oil-out (14) at piston (11) place at this shell (10), there is between described shell (10), pressure regulator valve body (8), oil return bolt (9) drainback passage (15) of intercommunication；In described pedestal (3), it is provided with the commutation mouth (17) that the fuel filter oil discharge passage (16) that the oil-out with fuel filter matches matches with reversal valve, pedestal (3) is additionally provided with the fuel oil oil-in (18) that the oil-in with fuel filter matches；Described go out oil draining bolt (4) at the top of the commutation mouth (17) of this pedestal (3), described go out oil draining bolt (4) connected with outlet line joint (20) by its oil outlet (5), described oil return bolt (9) is passed through its spill port (21) and is connected with return line joint (22).