An oil filter internal pressure detecting device

Abstract

The application relates to the technical field of oil filter detection equipment, in particular to an oil filter internal pressure detection device, which comprises a shell, a end cover located at the top of the shell, an oil inlet and an oil outlet arranged on the end cover, a filter core arranged in the shell, a detection assembly arranged at the bottom of the inner wall of the shell and used for detecting the internal liquid pressure of the filter core, and a liquid buffer assembly arranged in the filter core and used for buffering and guiding the internal liquid of the filter core to the detection assembly. The liquid buffer assembly is arranged to buffer the internal liquid of the filter core, so that the internal liquid of the filter core does not directly rush to the detection assembly, the problem of low detection precision of the detection assembly caused by uneven distribution of the liquid pressure value entering the filter core is solved, and the pressure detection precision of the detection assembly is improved.

Description

Technical Field

[0001] This invention relates to the field of oil filter testing equipment technology, and in particular to an internal pressure testing device for an oil filter. Background Technology

[0002] Oil filters lack pressure detection devices, making it impossible to monitor their internal condition in real time. They also cannot detect blockages promptly, requiring periodic cleaning.

[0003] Existing oil filter internal pressure detection devices, such as the oil filter pressure measuring device disclosed in patent number CN 212700857 U, include a housing, a filter element disposed within the housing, and a cover at the upper end of the housing. The cover has an oil inlet and an oil outlet. A transmitter mounting structure is located at the lower end of the housing. The transmitter mounting structure includes a sleeve mounted on the lower part of the filter element and a transmitter seat. The sleeve communicates with the inner hole of the filter element. The upper end of the transmitter seat is slidably sealed to the sleeve, and the lower end is sealed to the housing. The lower end has a mounting groove for mounting a pressure transmitter, which communicates with the inner cavity of the sleeve. A spring is provided between the transmitter seat and the sleeve. A pressure transmitter or pressure sensor can be installed at the bottom to monitor the pressure of the filtered oil in real time. When the filter element becomes clogged, the pressure change can be detected promptly, prompting the replacement of the oil filter.

[0004] When this device detects the internal liquid pressure of the oil filter, it directly places the pressure sensor at the bottom of the filter element for detection. However, when liquid enters the filter element, false alarms often occur due to the uncertainty of the filter element blockage location, which fails to meet actual needs. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing an internal pressure detection device for an oil filter.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design an internal pressure detection device for an oil filter, including a housing, an end cap located on the top of the housing, an oil inlet and an oil outlet provided on the end cap, a filter element disposed inside the housing, and further including...

[0008] A detection component, located at the bottom of the inner wall of the housing, is used to detect the liquid pressure inside the filter element;

[0009] A liquid buffer assembly, disposed inside the filter element, is used to buffer the liquid inside the filter element and guide it to the detection assembly.

[0010] Furthermore, the detection component includes a support ring edge disposed at the bottom of the filter element, a sleeve disposed at the bottom of the inner wall of the housing corresponding to the support ring edge, an inner groove disposed at the bottom of the support ring edge and sealingly fitted with the sleeve, and a sensor disposed within the sleeve.

[0011] Furthermore, it also includes an annular groove one opened along the top of the sleeve, an annular groove two opened on the recessed groove corresponding to the annular groove one, and a sealing ring embedded in the annular groove one and the annular groove two.

[0012] Furthermore, the liquid buffer assembly includes a central rod, a rotating connection portion connecting the central rod and the end cap, a buffer portion disposed on the central rod, and an auxiliary mixing portion disposed at one end of the central rod extending into the sleeve.

[0013] Furthermore, the rotating connection includes a suspension sleeve fixed to the bottom of the end cap, an annular groove three opened along the inner wall of the suspension sleeve, a movable ring rotatably connected to the annular groove three, and multiple reinforcing rods connecting the movable ring and the central rod.

[0014] Furthermore, the buffer unit includes a positioning seat fixed on the central rod, an arc-shaped concave plate one disposed on the positioning seat near the oil outlet, and an arc-shaped concave plate two fixed on the positioning seat near the sensor, wherein a guide channel is formed between the arc-shaped concave plate two and the support ring edge.

[0015] Furthermore, the auxiliary mixing section includes a plurality of stirring rods disposed on the central rod.

[0016] Furthermore, it also includes a pressing part provided on the central rod, the pressing part including a pressure plate for pressing the edge of the support ring, a through hole provided in the center of the pressure plate for the central rod to pass through, a limiting plate fixed on the central rod and located on both sides of the pressure plate, and a plurality of oil passage holes penetrating the pressure plate.

[0017] The oil filter internal pressure detection device proposed in this invention has the following advantages:

[0018] This invention buffers the liquid inside the filter element by setting a liquid buffer component, preventing the liquid entering the filter element from directly rushing towards the detection component. This solves the problem of low detection accuracy of the detection component caused by uneven distribution of liquid pressure inside the filter element, and improves the pressure detection accuracy of the detection component. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal pressure detection device for an oil filter proposed in this invention;

[0020] Figure 2 This is a schematic diagram of the caching component;

[0021] Figure 3 This is the side view of the cache component;

[0022] Figure 4 for Figure 1 Enlarged diagram of point A in the middle. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] Reference Figure 1-4 An internal pressure detection device for an oil filter includes a housing 1, an end cap 2 located at the top of the housing 1, an oil inlet 201 and an oil outlet 202 provided on the end cap 2, and a filter element 3 disposed inside the housing 1. The filter element 3 and the inner wall of the housing 1 form an outer cavity 101, and the inner wall of the filter element 3 has an inner cavity 301. The oil inlet 201 communicates with the outer cavity 101, and the oil outlet 202 communicates with the inner cavity 301. The device also includes...

[0025] The detection component 4 is located at the bottom of the inner wall of the housing 1 and is used to detect the liquid pressure inside the filter element 3;

[0026] The liquid buffer component 5 is located inside the filter element 3 and is used to buffer the liquid inside the filter element 3 and guide it to the detection component 4.

[0027] This invention buffers the liquid inside the filter element 3 by setting a liquid buffer component 5, preventing the liquid entering the filter element 3 from directly rushing towards the detection component 4. This solves the problem of low detection accuracy of the detection component 4 caused by uneven distribution of liquid pressure values ​​entering the filter element 3, and improves the pressure detection accuracy of the detection component 4.

[0028] In an optional embodiment of the present invention, the detection component 4 includes a support ring edge 401 disposed at the bottom of the filter element 3, a sleeve 402 disposed at the bottom of the inner wall of the housing 1 corresponding to the support ring edge 401, an inner groove 403 disposed at the bottom of the support ring edge 401 and sealed with the sleeve 402, and a sensor 404 disposed in the sleeve 402. The liquid entering the filter element 3 passes through the liquid buffer component 5 and enters the sleeve 402 through the channel in the center of the support ring edge 401, and the pressure of the liquid is detected by the sensor 404.

[0029] In an optional embodiment of the present invention, the device further includes an annular groove 405 formed along the top of the sleeve 402, an annular groove 406 formed on the recessed groove 403 corresponding to the annular groove 405, and a sealing ring 407 embedded in the annular groove 405 and the annular groove 406. After the sleeve 402 enters the recessed groove 403, the sealing ring 407 is in close contact with the annular groove 405 and the annular groove 406 respectively, thereby preventing the liquid in the outer cavity 101 from entering the sleeve 402 through the gap between the recessed groove 403 and the sleeve 402, which would affect the detection accuracy of the sensor 404.

[0030] In practical use, the applicant found that existing oil filter internal pressure detection devices often produce false alarms when detecting oil pressure. The main reason for this problem is that when liquid enters the filter element, due to the uncertainty of the filter element's blockage location, when the blockage is far from the sensor, the liquid pressure near the sensor does not fluctuate significantly, thus not immediately detecting the blockage and affecting the equipment's operation. However, when the blockage is close to the sensor, the sensor may detect excessive pressure fluctuations and immediately issue an alarm and remind the filter element to be replaced, even when the actual blockage has not reached the standard requiring filter element replacement. Therefore, the applicant developed the technical solution of this application, in which we have set up a liquid buffer component 5. The liquid entering the filter element is buffered and then directed to the sensor to improve the detection accuracy of the internal pressure detection device of the oil filter. The liquid buffer assembly 5 includes a central rod 501, a rotating connecting part 502 connecting the central rod 501 and the end cover 2, a buffer part 503 provided on the central rod 501, and an auxiliary mixing part 504 provided at one end of the central rod 501 that extends into the sleeve 402. After the liquid enters the filter element 3, it pushes the buffer part 503 to rotate, buffering and mixing liquids of different pressures evenly before guiding them to the sensor 404. At the same time, the auxiliary mixing part 504 stirs and mixes the liquid entering the sleeve 402 again to ensure that the liquid pressure contacted by the sensor 404 is stable and can reflect the overall liquid pressure inside the filter element 3, thereby improving the pressure detection accuracy.

[0031] In an optional embodiment of the present invention, the rotating connection part 502 includes a suspension sleeve 5021 fixed to the bottom of the end cover 2, an annular groove 5022 formed along the inner wall of the suspension sleeve 5021, a movable ring 5023 rotatably connected to the annular groove 5022, and multiple reinforcing rods 5024 connecting the movable ring 5023 and the central rod 501. Preferably, in this embodiment, the outer wall of the suspension sleeve 5021 is in close contact with the inner wall of the filter element 3, which can provide a certain support for the filter element 3. After the central rod 501 rotates, it drives the reinforcing rods 5024 to rotate, so that the liquid pressure entering the oil outlet 202 tends to be more stable.

[0032] In an optional embodiment of the present invention, the buffer unit 503 includes a positioning seat 5031 fixed on the central rod 501, an arc-shaped concave plate 5032 disposed at one end of the positioning seat 5031 near the oil outlet 202, and an arc-shaped concave plate 5033 fixed at one end of the positioning seat 5031 near the sensor 404. A guide channel 5034 is formed between the arc-shaped concave plate 5033 and the support ring edge 401. In this embodiment, the space enclosed by the arc-shaped concave plate 5032, the arc-shaped concave plate 5033, and the positioning seat 5031 can buffer the liquid entering the filter element 3, preventing the liquid from directly impacting the sensor 404. When the liquid entering the filter element 3 impacts the positioning seat 5031, some of the liquid flows downward through the arc-shaped concave plate 5033, then flows out through the guide channel 5034 and enters the sleeve 402, thereby ensuring the stability of the liquid pressure detected by the sensor 404, reflecting the overall liquid pressure inside the filter element 3, and improving the pressure detection accuracy.

[0033] In an optional embodiment of the present invention, the auxiliary mixing unit 504 includes a plurality of stirring rods 5041 disposed on the central rod 501. By setting the stirring rods 5041 to rotate with the central rod 501, the liquid entering the sleeve 402 can be stirred and mixed again.

[0034] In an optional embodiment of the present invention, a pressing part 505 is further provided on the central rod 501. The pressing part 505 includes a pressure plate 5051 for pressing the supporting ring edge 401, a through hole 5052 provided in the center of the pressure plate 5051 for the central rod 501 to pass through, a limiting plate 5053 fixed on the central rod 501 and located on both sides of the pressure plate 5051, and a plurality of oil passage holes 5054 penetrating the pressure plate 5051. Preferably, in this embodiment, two limiting plates are used. 5053 and center rod 501 are fixedly connected, and pressure plate 5051 and center rod 501 are rotatably connected; after center rod 501 drives pressure plate 5051 to press against support ring edge 401, the contact between sealing ring 407 and ring groove 1 405 and ring groove 2 406 becomes tighter, improving sealing performance. At the same time, by setting oil passage hole 5054, the liquid in guide channel 5034 is prevented from entering sleeve 402 too quickly, ensuring the stability of liquid pressure detected by sensor 404.

[0035] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An internal pressure detection device for an oil filter, comprising a housing (1), an end cap (2) located on the top of the housing (1), an oil inlet (201) and an oil outlet (202) provided on the end cap (2), and a filter element (3) provided inside the housing (1), characterized in that: Also includes The detection component (4) is located at the bottom of the inner wall of the housing (1) and is used to detect the liquid pressure inside the filter element (3); A liquid buffer assembly (5) is disposed inside the filter element (3) for buffering the liquid inside the filter element (3) and guiding it to the detection assembly (4). The detection component (4) includes a support ring edge (401) at the bottom of the filter element (3), a sleeve (402) corresponding to the support ring edge (401) at the bottom of the inner wall of the housing (1), an inner groove (403) at the bottom of the support ring edge (401) and sealed to the sleeve (402), and a sensor (404) in the sleeve (402). It also includes an annular groove 1 (405) opened along the top of the sleeve (402), an annular groove 2 (406) opened on the recessed groove (403) corresponding to the annular groove 1 (405), and a sealing ring (407) embedded in the annular groove 1 (405) and the annular groove 2 (406). The liquid buffer assembly (5) includes a central rod (501), a rotating connection part (502) connecting the central rod (501) and the end cap (2), a buffer part (503) provided on the central rod (501), and an auxiliary mixing part (504) provided at one end of the central rod (501) that extends into the sleeve (402). The rotating connection part (502) includes a suspension sleeve (5021) fixed to the bottom of the end cover (2), an annular groove three (5022) opened along the inner wall of the suspension sleeve (5021), a movable ring (5023) rotatably connected to the annular groove three (5022), and multiple reinforcing rods (5024) connecting the movable ring (5023) and the center rod (501). The buffer unit (503) includes a positioning seat (5031) fixed on the center rod (501), an arc concave plate one (5032) provided on the positioning seat (5031) near the oil outlet (202), and an arc concave plate two (5033) fixed on the positioning seat (5031) near the sensor (404). A guide channel (5034) is formed between the arc concave plate two (5033) and the support ring edge (401).

2. The internal pressure detection device for the oil filter according to claim 1, characterized in that: The auxiliary mixing section (504) includes a plurality of stirring rods (5041) disposed on the central rod (501).

3. The internal pressure detection device for the oil filter according to claim 1, characterized in that: It also includes a pressing part (505) provided on the center rod (501), the pressing part (505) including a pressure plate (5051) for pressing the support ring edge (401), a through hole (5052) provided in the center of the pressure plate (5051) for the center rod (501) to pass through, a limiting plate (5053) fixed on the center rod (501) and located on both sides of the pressure plate (5051), and a plurality of oil passage holes (5054) penetrating the pressure plate (5051).

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