An oil filter pressure reducing valve

Abstract

This utility model provides an oil filter pressure reducing valve, including a filter connecting plate, a main housing, and an outer housing. The main housing and the outer housing are fixed to the lower end of the filter connecting plate. The main housing is located inside the outer housing, and an auxiliary cavity is formed between the main housing and the outer housing. A sealing block is fixed to the lower end of the auxiliary cavity. A second filter ring and a first filter ring are respectively embedded at the upper and lower ends of the outer housing. The main housing has a main cavity, and a fixing plate is horizontally welded inside the main cavity. This design solves the problem that the original oil filter pressure reducing valve actually uses a single spring for pressure reduction, resulting in poor pressure reduction effect after long-term use. This utility model adopts a double-spring pressure balance and magnetic damping composite structure, which can efficiently buffer the oil fluid. The use of the main cavity and auxiliary cavity structure makes this pressure reducing valve more precise.

Description

Technical Field

[0001] This utility model relates to a pressure reducing valve for an oil filter element, belonging to the technical field of pressure reducing valves. Background Technology

[0002] Pressure reducing valves, generally used in compressed fluid filters, employ a rolling diaphragm. When the input pressure fluctuates, the diaphragm automatically adjusts, and combined with a pressure spring, the pressure output can be stabilized by adjusting the spring pressure, ensuring stable fluid pressure.

[0003] Chinese patent CN213145499U proposes an oil filter pressure reducing valve. By setting a pressure reducing device and a conduit, it can significantly reduce fluid pressure, achieving a pressure reducing effect and stabilizing the fluid flow at a safe pressure each time. By setting a pressure feedback device, users can intuitively understand the magnitude of the fluid inlet and outlet pressure, ensuring the safety of equipment use. However, this device actually uses a single spring for pressure reduction. When used for a long time in a high-temperature oil environment (above 120℃), the spring is prone to thermal aging, with an elastic coefficient decay rate ≥15% / year, resulting in a large deviation in opening pressure. There is an urgent need for an oil filter pressure reducing valve to solve the above-mentioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide an oil filter pressure reducing valve to solve the problems mentioned in the background. This invention adopts a dual-spring pressure balance and magnetic damping composite structure, which can efficiently buffer the oil fluid. Furthermore, the use of a main cavity and an auxiliary cavity structure makes this pressure reducing valve more precise.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an oil filter pressure reducing valve, comprising a buffer plate, a guide rod, a filter connecting plate, a main housing, and an outer housing. The filter connecting plate has the main housing and the outer housing fixed at its lower end. The main housing is located inside the outer housing, and an auxiliary cavity is formed between the main housing and the outer housing. A sealing block is fixed at the lower end of the auxiliary cavity. A second filter ring and a first filter ring are respectively embedded at the upper and lower ends of the outer housing. The main housing has a main cavity, and a fixing plate is horizontally welded inside the main cavity. A main spring is connected to the lower end of the fixing plate. A buffer plate is slidably arranged at the lower end of the main cavity. A ferrite magnet ring is fixed at the upper end of the auxiliary cavity. An auxiliary spring is connected to the lower end of the ferrite magnet ring. A rubber ring is slidably arranged at the lower end of the auxiliary cavity, and an iron-nickel alloy ring is fixed inside the rubber ring.

[0006] Furthermore, an oil outlet pipe is installed through the upper end of the filter element connecting plate, and an oil inlet pipe is installed through the lower end of the main housing.

[0007] Furthermore, the first filter ring is located inside the arc surface of the sealing block.

[0008] Furthermore, the buffer plate slides against the inner wall of the main housing, the buffer plate is located below the first filter ring, and the upper end of the buffer plate is connected to the main spring. A guide rod is longitudinally welded to the lower end of the fixed plate, the buffer plate (17) slides through the guide rod, and the fixed plate is located below the second filter ring.

[0009] Furthermore, a conical guide ring is fixed to the upper edge of the main cavity.

[0010] Furthermore, the upper end of the iron-nickel alloy ring is connected to an auxiliary spring.

[0011] The beneficial effects of this utility model are as follows: This utility model provides an oil filter pressure reducing valve. Because it incorporates a main housing, filter connecting plate, outer housing, sealing block, first filter ring, main spring, fixing plate, second filter ring, conical guide ring, ferrite magnet ring, auxiliary spring, iron-nickel alloy ring, and rubber ring, its structure is reasonable. It adopts a double-spring pressure balance and magnetic damping composite structure, which can efficiently buffer the oil fluid. Furthermore, the use of a main cavity and auxiliary cavity structure makes this pressure reducing valve more precise. Combined with the double filter rings, it can also perform double filtration of the incoming oil, ensuring subsequent use effectiveness and making it highly practical. Attached Figure Description

[0012] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the structure of a pressure reducing valve for an oil filter according to the present invention;

[0014] Figure 2 This is a cross-sectional structural diagram of a pressure reducing valve for an oil filter element according to the present invention.

[0015] Figure 3 This is a schematic diagram of the ferrite magnet ring connection structure of a pressure reducing valve for an oil filter according to this utility model.

[0016] In the diagram: 1-Inlet pipe, 2-Main housing, 3-Filter element connecting plate, 4-Outlet pipe, 5-Outer housing, 6-Sealing block, 7-First filter ring, 8-Main spring, 9-Fixing plate, 10-Second filter ring, 11-Conical guide ring, 12-Ferrite magnet ring, 13-Auxiliary cavity, 14-Auxiliary spring, 15-Iron-nickel alloy ring, 16-Rubber ring, 17-Buffer plate, 18-Guide rod. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] Please see Figures 1-3 This utility model provides a technical solution: an oil filter pressure reducing valve, including a filter connecting plate 3, a main housing 2, and an outer housing 5. The main housing 2 and the outer housing 5 are fixed at the lower end of the filter connecting plate 3. The main housing 2 is located inside the outer housing 5, and an auxiliary cavity 13 is formed between the main housing 2 and the outer housing 5. A sealing block 6 is fixed at the lower end of the auxiliary cavity 13. A second filter ring 10 and a first filter ring 7 are respectively embedded at the upper and lower ends of the outer housing 5. The main housing 2 has a main cavity. A fixing plate 9 is horizontally welded inside the main cavity. A main spring 8 is connected to the lower end of the fixing plate 9. A buffer plate is slidably arranged at the lower end of the main cavity. A ferrite magnet ring 12 is fixed at the upper end of the auxiliary cavity 13. An auxiliary spring 14 is connected to the lower end of the ferrite magnet ring 12. A rubber ring 16 is slidably arranged at the lower end of the auxiliary cavity 13. An iron-nickel alloy ring 15 is fixed inside the rubber ring 16. This design solves the problem that the original oil filter pressure reducing valve actually uses a single spring for pressure reduction, resulting in poor pressure reduction effect after long-term use.

[0019] As the first embodiment of this utility model: an oil outlet pipe 4 is installed through the upper end of the filter element connecting plate 3, and an oil inlet pipe 1 is installed through the lower end of the main housing 2. The first filter ring 7 is located inside the arc surface of the sealing block 6. The added first filter ring 7 can perform preliminary filtration of the engine oil entering from the lower end of the main cavity, while the sealing block 6 can guide the engine oil passing through the first filter ring 7. The buffer plate 17 slides against the inner wall of the main housing 2. The buffer plate 17 is located below the first filter ring 7, and the upper end of the buffer plate 17 is connected to the main spring 8. A guide rod 18 is longitudinally welded to the lower end of the fixing plate 9. The buffer plate 17 slides through the guide rod 18. The fixing plate 9 is located below the second filter ring 10. The upper end of the added buffer plate 17 is connected to the main spring 8. The buffer plate 17 slides through the guide rod 18. When engine oil is introduced into the lower end of the main cavity, it can slide horizontally upward under pressure. A conical guide ring 11 is fixed to the upper edge of the main cavity. The added conical guide ring 11 facilitates the flow of engine oil into the upper part of the main cavity. The upper end of the iron-nickel alloy ring 15 is connected to the auxiliary spring 14. When the iron-nickel alloy ring 15 is pushed upward by the engine oil below, it can compress the auxiliary spring 14 and attract it to the ferrite magnet ring 12. When the pressure of the engine oil flowing below is too low, the compressible auxiliary spring 14 can be pushed downward to its original position and the magnetic attraction effect with the ferrite magnet ring 12 will be broken.

[0020] As a second embodiment of this utility model: the engine oil enters the lower end of the main cavity through the oil inlet pipe 1, and the pressure of the incoming engine oil pushes the buffer plate 17 upward, causing the buffer plate 17 to move upward outside the guide rod 18 and compress the main spring 8 until the first filter ring 7 leaks out. The engine oil that has undergone initial buffering and decompression enters the auxiliary cavity 13 through the first filter ring 7, and moves upward through the arc-shaped surface of the sealing block 6, thereby pushing the iron-nickel alloy ring 15 and the rubber ring 16 to slide upward in the auxiliary cavity 13. During this process, the iron-nickel alloy ring 15 compresses the auxiliary spring 14 and attracts the ferrite magnet ring 12 until the first filter ring 7 leaks out. The engine oil that has undergone secondary buffering and decompression passes through the first filter ring 7 and enters the upper end of the main cavity, and is guided by the conical guide ring 11 to the oil outlet pipe 4 for discharge.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An oil filter cartridge pressure reducing valve comprising a filter cartridge connecting plate (3), a main housing (2) and an outer housing (5), characterized in that: The filter element connecting plate (3) has a main housing (2) and an outer housing (5) fixed at its lower end. The main housing (2) is located inside the outer housing (5), and an auxiliary cavity (13) is formed between the main housing (2) and the outer housing (5). A sealing block (6) is fixed at the lower end of the auxiliary cavity (13). A second filter ring (10) and a first filter ring (7) are respectively embedded at the upper and lower ends of the outer housing (5). The main housing (2) has a main cavity. A fixing plate (9) is horizontally welded inside the main cavity. A main spring (8) is connected to the lower end of the fixing plate (9). A buffer plate is slidably arranged at the lower end of the main cavity. A ferrite magnet ring (12) is fixed at the upper end of the auxiliary cavity (13). An auxiliary spring (14) is connected to the lower end of the ferrite magnet ring (12). A rubber ring (16) is slidably arranged at the lower end of the auxiliary cavity (13). An iron-nickel alloy ring (15) is fixed inside the rubber ring (16).

2. A pressure reducing valve for an oil filter cartridge according to claim 1, wherein: An oil outlet pipe (4) is installed through the upper end of the filter element connecting plate (3), and an oil inlet pipe (1) is installed through the lower end of the main housing (2).

3. The pressure reducing valve for an oil filter cartridge according to claim 1, wherein: The first filter ring (7) is located inside the arc surface of the sealing block (6).

4. The pressure reducing valve for an oil filter cartridge of claim 1 wherein: The buffer plate (17) slides against the inner wall of the main housing (2). The buffer plate (17) is located below the first filter ring (7), and the upper end of the buffer plate (17) is connected to the main spring (8). The lower end of the fixing plate (9) is longitudinally welded with a guide rod (18). The buffer plate (17) slides through the guide rod (18), and the fixing plate (9) is located below the second filter ring (10).

5. The pressure reducing valve for an oil filter cartridge of claim 1 wherein: A conical guide ring (11) is fixed at the upper edge of the main cavity.

6. A pressure reducing valve for an oil filter cartridge according to claim 1 wherein: The upper end of the iron-nickel alloy ring (15) is connected to the auxiliary spring (14).

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