Filter with bypass valve

Abstract

The utility model discloses a filter with a bypass valve, relates to the technical field of filters, and aims to solve the problems that a bypass valve in an existing filter is far away from an oil outlet, and pressure relief is not timely. Comprising a shell and an end cover, the end cover is arranged at the top of the shell, an oil outlet and an oil inlet are formed in the end cover, a filter element is further arranged in the shell, a first spring is further arranged between the bottom of the filter element and the shell, the outer wall of the filter element is sleeved with filter paper, and a bypass valve assembly is further arranged on the filter element. When the filter paper is blocked due to long-time filtering, the oil pressure in the filter rises, the valve plate of the bypass valve can extrude the second spring to open the mounting hole, fuel oil enters an engine through the oil outlet, continuous supply of the fuel oil in the engine is maintained, meanwhile, the oil pressure inside and outside the filter paper can be rapidly stabilized, other parts in the filter are prevented from being damaged, and the service life of the filter is prolonged. And the service life of the filter is influenced.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a filter with a bypass valve. Background Technology

[0002] The bypass valve on the filter is a safety protection device. Its core function is to temporarily allow unfiltered fluid to bypass the clogged filter and enter the system directly under extreme operating conditions (such as when the filter element is clogged or the fluid viscosity is too high), thereby protecting the equipment from damage and maintaining the basic operation of the system.

[0003] Most bypass valves in existing filters are located far from the engine's fuel inlet. When the fuel pressure reaches a certain level, the bypass valve opens, and the fuel in the filter still needs to flow through the entire filter before entering the engine. It is impossible to release the fuel pressure in the filter at the moment the bypass valve opens, which can easily cause damage to other components in the filter under the pressure of the fuel, thus affecting the service life of the filter.

[0004] Therefore, this application provides a filter with a bypass valve to meet the requirements. Utility Model Content

[0005] The purpose of this application is to provide a filter with a bypass valve, which aims to solve the problems of the bypass valve in existing filters being far from the oil outlet and not depressurizing in a timely manner.

[0006] To achieve the above objectives, this application provides the following technical solution: a filter with a bypass valve, comprising a housing and an end cap, wherein the housing is a shell with a transparent top, and the end cap is provided on the top of the housing, and the end cap and the housing enclose a sealed filter chamber;

[0007] An oil outlet communicating with the filter chamber is provided at the axial center of the end cap, and an oil inlet communicating with the filter chamber is also provided on the end cap.

[0008] The housing also contains a filter element, with a first spring between the bottom of the filter element and the housing, and a sealing ring between the top of the filter element and the end cap. Filter paper is fitted onto the outer wall of the filter element, and a bypass valve assembly is also provided on the filter element. By placing the bypass valve assembly near the oil outlet, when the filter paper becomes clogged after prolonged filtration, the oil pressure in the filter increases. The valve plate of the bypass valve can compress the second spring, opening the mounting hole and allowing fuel to enter the engine through the oil outlet, maintaining a continuous fuel supply to the engine. At the same time, it can quickly stabilize the oil pressure inside and outside the filter paper, preventing damage to other components in the filter and affecting the service life of the filter.

[0009] Preferably, the filter element includes a top plate, a filter cartridge, and a bottom plate. The top plate has a through hole at its axial center and is coaxially arranged with the oil outlet. The filter paper covers the filter cartridge, and the first spring is provided between the bottom plate and the outer shell.

[0010] Preferably, the oil inlet is located outside the oil outlet and between the top plate and the outer casing.

[0011] Preferably, the bypass valve assembly includes a valve plate and a support frame. The top plate has a mounting hole, and the valve plate with a size adapted to the mounting hole is provided in the mounting hole. The support frame is also provided on the bottom surface of the top plate, and a second spring is provided between the valve plate and the support frame.

[0012] Preferably, the valve plate and the support frame are further provided with guide rods on their opposing surfaces. Multiple sets of guide rods are provided and are offset from the support frame.

[0013] In summary, the technical effects and advantages of this utility model are as follows:

[0014] In this invention, by placing the bypass valve assembly near the oil outlet, when the filter paper becomes clogged after prolonged filtration, the oil pressure in the filter increases. The valve plate of the bypass valve can then compress the second spring, opening the mounting hole and allowing fuel to enter the engine through the oil outlet, maintaining a continuous fuel supply to the engine. At the same time, it can quickly stabilize the oil pressure inside and outside the filter paper, preventing damage to other components in the filter and affecting the service life of the filter. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the filter element structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the bypass valve assembly of this utility model.

[0020] In the diagram: 1. Outer casing; 2. End cap; 3. Oil outlet; 4. Oil inlet; 5. First spring; 6. Filter element; 7. Filter paper; 8. Bypass valve assembly;

[0021] 61. Top plate; 62. Filter cartridge; 63. Bottom plate; 64. Mounting hole;

[0022] 81. Valve plate; 82. Support frame; 83. Guide rod; 84. Second spring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: Reference Figure 1-4 The filter shown includes a housing 1 and an end cap 2. The housing 1 is a shell with a transparent top, and the end cap 2 is provided on the top of the housing 1. The end cap 2 and the housing 1 enclose a sealed filter chamber.

[0025] An oil outlet 3 communicating with the filter chamber is provided at the axial center of the end cover 2. An oil inlet 4 communicating with the filter chamber is also provided on the end cover 2. There are two sets of oil inlets 4, which are symmetrically arranged on the end cover 2. The oil inlet 4 is located outside the oil outlet 3 and between the top plate 61 and the outer shell 1.

[0026] The housing 1 is also provided with a filter element 6 inside. A first spring 5 is provided between the bottom of the filter element 6 and the housing 1. The filter element 6 includes a top plate 61, a filter cylinder 62 and a bottom plate 63. A through hole is opened at the axis of the top plate 61 and is coaxially arranged with the oil outlet 3. The filter paper 7 is wrapped on the filter cylinder 62. The first spring 5 is provided between the bottom plate 63 and the housing 1.

[0027] A sealing ring is provided between the top of the filter element 6 and the end cap 2. Filter paper 7 is fitted on the outer wall of the filter element 6. A bypass valve assembly 8 is also provided on the filter element 6.

[0028] The bypass valve assembly 8 includes a valve plate 81 and a support frame 82. The top plate 61 has a mounting hole 64, and the valve plate 81 with a size adapted to the mounting hole 64 is provided in the mounting hole 64. The support frame 82 is also provided on the bottom surface of the top plate 61. A second spring 84 is provided between the valve plate 81 and the support frame 82.

[0029] The valve plate 81 and the support frame 82 are also provided with guide rods 83. Multiple sets of guide rods 83 are provided and are staggered with the support frame 82.

[0030] The working principle of this utility model is as follows: During use, fuel enters the filter chamber formed by the outer shell 1 and the end cover 2 through the fuel inlet 4. The fuel is filtered by the filter paper 7 and enters the filter element 6. Then, it passes through the through hole on the top plate 61 and is discharged into the engine through the fuel outlet 3 on the end cover 2, thus completing the filtration of the fuel. As the usage time increases, more and more impurities are filtered on the filter paper 7, which reduces the amount of oil passing through the filter paper 7. This causes a change in the pressure difference between the inside and outside of the filter element 6. At the same time, the amount of oil flowing out of the fuel outlet 3 decreases. When the pressure difference between the two is greater than the elastic force of the second spring 84, the valve plate 81 is pressed down, opening the mounting hole 64. Fuel enters the filter element 6 through the mounting hole 64 and enters the engine through the fuel outlet 3, thus relieving pressure in time. This alleviates the pressure difference between the inside and outside of the filter element 6, ensuring fuel supply while preventing damage to the filter element 6.

[0031] The electromechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments; they are common knowledge.

[0032] Components not described in detail in this article are existing technologies.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filter with a bypass valve, characterized in that: It includes an outer shell (1) and an end cap (2). The outer shell (1) is a shell with a transparent top. The end cap (2) is provided on the top of the outer shell (1). The end cap (2) and the outer shell (1) enclose a sealed filter chamber. An oil outlet (3) communicating with the filter chamber is provided at the axial center of the end cap (2), and an oil inlet (4) communicating with the filter chamber is also provided on the end cap (2). The housing (1) is also provided with a filter element (6), and a first spring (5) is provided between the bottom of the filter element (6) and the housing (1). A sealing ring is provided between the top of the filter element (6) and the end cap (2). Filter paper (7) is fitted on the outer wall of the filter element (6). A bypass valve assembly (8) is also provided on the filter element (6).

2. A filter with a bypass valve according to claim 1, characterized in that: The filter element (6) includes a top plate (61), a filter cartridge (62) and a bottom plate (63). The top plate (61) has a through hole at its axial center and is coaxially arranged with the oil outlet (3). The filter paper (7) is wrapped around the filter cartridge (62). The bottom plate (63) and the outer shell (1) are provided with the first spring (5).

3. A filter with a bypass valve according to claim 2, characterized in that: The oil inlet (4) is located outside the oil outlet (3) and between the top plate (61) and the outer shell (1).

4. A filter with a bypass valve according to claim 2, characterized in that: The bypass valve assembly (8) includes a valve plate (81) and a support frame (82). A mounting hole (64) is provided on the top plate (61). The valve plate (81) with a size adapted to the mounting hole (64) is provided in the mounting hole (64). The support frame (82) is also provided on the bottom surface of the top plate (61). A second spring (84) is provided between the valve plate (81) and the support frame (82).

5. A filter with a bypass valve according to claim 4, characterized in that: The valve plate (81) and the support frame (82) are provided with guide rods (83) facing each other. Multiple sets of guide rods (83) are provided and are offset from the support frame (82).

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