A pressure relief valve structure for a liquid filter cartridge

Abstract

The utility model relates to a kind of pressure relief valve structures for liquid filter element, including valve seat, valve body, valve core and spring;Multiple clamping hooks are equipped on the valve seat, for fixing valve body, the valve body is connected with valve seat by the clamping hook;The spring acts on valve core, so that valve core is closely attached to valve body when normal working;At least one support rib is equipped on the valve seat, the support rib is located near the position of the clamping hook, for inhibiting clamping hook inward deformation under the action of spring force and pressure pulsation, prevent valve body from falling off from valve seat.The support rib of the valve seat is formed by mould, and does not affect the demoulding direction of valve seat.Compared with prior art, the utility model has the advantages of improving reliability and service life, low modification cost, convenient implementation, strong compatibility, strong adjustability, etc.

Description

Technical Field

[0001] This utility model relates to the field of liquid filter technology, and in particular to a pressure relief valve structure for a liquid filter element. Background Technology

[0002] The pressure relief valve is closed under normal operating conditions. When the engine oil viscosity is high at low temperatures or the filter element is clogged, the pressure increases, and the pressure relief valve opens to ensure oil flow and timely lubrication of moving parts. However, in existing pressure relief valve structures, the engineering plastic components can aging and deform during use. Under the combined effects of spring force and pressure pulsation, the valve body may detach from the valve seat, resulting in ineffective oil filtration.

[0003] CN201610749838.X discloses an environmentally friendly filter element with a bypass valve, comprising a filter element body disposed within an oil reservoir. The filter element body includes a central tube and filter media surrounding the central tube. An upper cover is sealed to the upper end of the filter element body, and a lower cover is sealed to the lower end. A screw-on cap is connected to the upper cover. A bypass valve is installed at the upper end of the central tube. The bypass valve includes a valve seat and a valve core mounted on the valve seat. A safety valve spring is connected to the valve core. The upper cover, lower cover, and central tube are all injection molded. The filter media is integrally formed with the upper cover, lower cover, and central tube by hot-melt welding. The top wall of the outer cover has several downward-protruding clips that insert into the central hole of the upper cover for snap-fit ​​installation. However, the valve seat is connected to the central tube via its clips. Simply changing the valve seat material from metal to plastic without any deformation-resistant reinforcement of the clips themselves does not solve the problems of detachment and failure. Utility Model Content

[0004] The purpose of this utility model is to overcome the defects of the prior art and provide a pressure relief valve structure for liquid filter elements, which improves reliability and service life, has low modification cost, is easy to implement, has strong compatibility, and is highly adjustable.

[0005] The objective of this utility model can be achieved through the following technical solutions: This utility model provides a pressure relief valve structure for a liquid filter element, including a valve seat, a valve body, a valve core, and a spring; The valve seat is provided with multiple hooks for securing the valve body, which is connected to the valve seat via these hooks. A spring acts on the valve core, ensuring it remains firmly against the valve body during normal operation. The valve seat is provided with at least one support rib located near the hooks to prevent inward deformation of the hooks under spring force and pressure pulsation, thus preventing the valve body from detaching from the valve seat. The support rib of the valve seat is formed by a mold and does not affect the demolding direction of the valve seat.

[0006] The pressure relief valve is closed during normal operation. When the oil viscosity increases or the filter becomes clogged, causing the pressure to rise, the pressure relief valve opens to ensure oil flow.

[0007] Furthermore, the number of supporting ribs is four, which are evenly distributed on the valve seat.

[0008] Furthermore, the four supporting ribs are evenly distributed radially, with each supporting rib located at the center between two adjacent hooks.

[0009] Furthermore, the thickness of the support rib is adjusted according to the force of the spring. When the spring force increases, the thickness of the support rib increases accordingly; when the spring force decreases, the thickness of the support rib decreases accordingly.

[0010] Furthermore, the number of hooks is eight, evenly distributed on the valve seat.

[0011] Furthermore, the supporting rib is integrally formed with the valve seat to create an integral plastic structural component.

[0012] Furthermore, the arrangement direction of the supporting ribs is perpendicular to the deformation direction of the hook, in order to resist the inward deformation of the hook to the greatest extent.

[0013] Furthermore, the cross-sectional shape of the support rib is rectangular, and its width is 0.5-1.5 times the thickness of the valve seat wall.

[0014] Furthermore, the height of the supporting rib is approximately equal to the height of the hook portion of the latch, ensuring effective limitation of hook deformation.

[0015] Furthermore, the outer edge of the valve seat is provided with a protruding structure for fixing the entire pressure relief valve to the filter element.

[0016] This utility model, while fully retaining the original valve body, valve core, spring and installation method, makes a key improvement to the valve seat: at least one supporting rib is added at the inner root position of the hook on the valve seat.

[0017] Working principle: The function of the support rib is to increase the rigidity of the hook root. When the spring force attempts to deform the hook inward, the support rib acts as an additional support point, greatly increasing the hook's ability to resist bending deformation, thereby preventing excessive deformation and failure.

[0018] Dynamic operation: During valve body assembly, the catch needs to open outwards to pass over the flange on the valve body. After assembly, due to the inward tilt angle of the catch itself, the spring force will generate a continuous inward bending moment. The presence of the support rib is specifically designed to resist this bending moment in a specific direction, ensuring the durability of the connection.

[0019] 1. When the engine is running normally, the oil pressure is within the design range. At this time, the pressure relief valve is in the closed position, and its working principle is as follows: Spring force dominates: The spring is compressed, pressing the valve core tightly against the valve body to form a seal. The valve body is fixed to the valve seat by its peripheral hook structure, and the valve seat itself is fixed to the filter element by protrusions on its outer edge. The entire system achieves balance under the spring force, oil pressure, and structural reaction force, ensuring that all oil passes through the filter element before entering the engine lubrication system.

[0020] 2. Under abnormal operating conditions, such as low-temperature start (due to excessively high oil viscosity) or filter blockage, the oil pressure rises and exceeds the set threshold. High-pressure oil acts on the valve core, and when the pressure exceeds the spring's preload, it pushes the valve core away from the valve body. The oil then enters the engine lubrication system directly through the opened pressure relief valve, preventing engine wear due to insufficient oil supply. This process is temporary; once the pressure returns to normal, the spring force will close the pressure relief valve again.

[0021] Compared with the prior art, the present invention has the following advantages: (1) Improved reliability and service life. By adding a supporting rib structure near the valve seat hook that mates with the valve body, the tendency of the hook to deform inward under long-term spring force and pressure pulsation is effectively suppressed. This solves the problem of valve body falling off due to aging and deformation of engineering plastics in the original design, thereby significantly extending the overall service life of the pressure relief valve and greatly improving its operational reliability.

[0022] (2) Low modification cost and convenient implementation. Based on local optimization of existing mature products. Support ribs were added to the valve seat, which does not require changing the original demolding scheme. Only local modifications (removal of some materials) to the existing mold are required, avoiding the huge cost of re-molding. At the same time, all other components such as valve body, valve core, and spring can remain unchanged, realizing the maximum reuse of parts. This makes the overall cost and cycle of the improvement scheme much lower than developing a completely new structure.

[0023] (3) Maintains original installation and function, with strong compatibility and adjustability. The improved pressure relief valve retains the original force balance relationship, ensuring product replaceability and assembly process continuity, requiring no major adjustments to the production line. The thickness of the support ribs can be adjusted according to the magnitude of the spring force. If the spring force increases, the rib thickness can be appropriately increased to provide stronger support; if the spring force decreases, it can be thinned to save material. This flexibility allows the structure to easily adapt to the needs of different models and pressure levels of products, improving the versatility and economy of the design. Attached Figure Description

[0024] Figure 1A cross-sectional view of the pressure relief valve structure used in liquid filter cartridges; Figure 2 This is a schematic diagram of the support ribs for the pressure relief valve structure used in liquid filter cartridges.

[0025] Reference numerals in the attached diagram: 1-valve seat; 2-valve body; 3-valve core; 4-spring; 5-support rib. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0027] Example 1 This embodiment provides a pressure relief valve structure for a liquid filter element, such as... Figure 1 , 2 As shown, it includes valve seat 1, valve body 2, valve core 3 and spring 4; The valve seat 1 is provided with multiple hooks for fixing the valve body 2, and the valve body 2 is connected to the valve seat 1 through the hooks. The spring 4 acts on the valve core 3, so that the valve core 3 is tightly attached to the valve body 2 during normal operation. The valve seat 1 is provided with at least one support rib 5, which is located near the hooks and is used to suppress the inward deformation of the hooks under the spring force and pressure pulsation, preventing the valve body 2 from falling off the valve seat 1. The support rib 5 of the valve seat 1 is formed by a mold and does not affect the demolding direction of the valve seat 1.

[0028] The pressure relief valve is closed during normal operation. When the oil viscosity increases or the filter becomes clogged, causing the pressure to rise, the pressure relief valve opens to ensure oil flow.

[0029] Example 2 This embodiment provides a pressure relief valve structure for a liquid filter element, such as... Figure 1 , 2 As shown, it includes valve seat 1, valve body 2, valve core 3 and spring 4; The valve seat 1 is provided with multiple hooks for fixing the valve body 2, and the valve body 2 is connected to the valve seat 1 through the hooks. The spring 4 acts on the valve core 3, so that the valve core 3 is tightly attached to the valve body 2 during normal operation. The valve seat 1 is provided with at least one support rib 5, which is located near the hooks and is used to suppress the inward deformation of the hooks under the spring force and pressure pulsation, preventing the valve body 2 from falling off the valve seat 1. The support rib 5 of the valve seat 1 is formed by a mold and does not affect the demolding direction of the valve seat 1.

[0030] The pressure relief valve is closed during normal operation. When the oil viscosity increases or the filter becomes clogged, causing the pressure to rise, the pressure relief valve opens to ensure oil flow.

[0031] In a specific embodiment, there are four supporting ribs 5, which are evenly distributed on the valve seat 1.

[0032] In a specific implementation, the four support ribs 5 are evenly distributed radially, with each support rib 5 located at the center between two adjacent hooks.

[0033] In a specific embodiment, the thickness of the support rib 5 is adjusted according to the force of the spring 4. When the spring force increases, the thickness of the support rib 5 increases accordingly; when the spring force decreases, the thickness of the support rib 5 decreases accordingly.

[0034] In a specific embodiment, the number of hooks is eight, which are evenly distributed on the valve seat 1.

[0035] In a specific embodiment, the supporting rib 5 is integrally formed with the valve seat 1 to form an integral plastic structural component.

[0036] In a specific embodiment, the arrangement direction of the supporting rib 5 is perpendicular to the deformation direction of the hook, in order to resist the inward deformation of the hook to the greatest extent.

[0037] In a specific embodiment, the cross-sectional shape of the support rib 5 is rectangular, and the width is 0.5-1.5 times the thickness of the valve seat wall.

[0038] In a specific embodiment, the height of the support rib 5 is approximately equal to the height of the hook portion of the catch, ensuring effective limitation of hook deformation.

[0039] In a specific embodiment, the outer edge of the valve seat 1 is provided with a protruding structure for fixing the entire pressure relief valve to the filter element.

[0040] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0041] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A pressure relief valve structure for a liquid filter element, characterized in that, Includes valve seat (1), valve body (2), valve core (3) and spring (4); The valve seat (1) is provided with multiple hooks for fixing the valve body (2). The valve body (2) is connected to the valve seat (1) through the hooks. The spring (4) acts on the valve core (3) so that the valve core (3) is in close contact with the valve body (2) during normal operation. The valve seat (1) is provided with at least one support rib (5). The support rib (5) is located near the hooks and is used to suppress the hooks from deforming inward under the action of spring force and pressure pulsation, so as to prevent the valve body (2) from falling off the valve seat (1).

2. The pressure relief valve structure for a liquid filter element according to claim 1, characterized in that, The number of the supporting ribs (5) is four, which are evenly distributed on the valve seat (1).

3. The pressure relief valve structure for a liquid filter element according to claim 2, characterized in that, The four support ribs (5) are evenly distributed radially, with each support rib (5) located at the center between two adjacent hooks.

4. The pressure relief valve structure for a liquid filter element according to claim 1, characterized in that, The thickness of the support rib (5) is adjusted according to the force of the spring (4). When the spring force increases, the thickness of the support rib (5) increases accordingly; when the spring force decreases, the thickness of the support rib (5) decreases accordingly.

5. The pressure relief valve structure for a liquid filter element according to claim 1, characterized in that, The number of hooks is eight, which are evenly distributed on the valve seat (1).

6. The pressure relief valve structure for a liquid filter element according to claim 1, characterized in that, The supporting rib (5) and the valve seat (1) are integrally formed to form an integral plastic structural component.

7. The pressure relief valve structure for a liquid filter element according to claim 1, characterized in that, The arrangement direction of the support rib (5) is perpendicular to the deformation direction of the hook.

8. The pressure relief valve structure for a liquid filter element according to claim 1, characterized in that, The cross-sectional shape of the support rib (5) is rectangular, and the width is 0.5-1.5 times the thickness of the valve seat wall.

9. A pressure relief valve structure for a liquid filter element according to claim 1, characterized in that, The height of the support rib (5) is approximately equal to the height of the hook part of the hook.

10. A pressure relief valve structure for a liquid filter element according to claim 1, characterized in that, The outer edge of the valve seat (1) is provided with a protruding structure for fixing the entire pressure relief valve to the filter element.

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