An oil filter leak detection device and method

Abstract

This invention discloses an oil filter sealing performance testing device and method, belonging to the field of filter testing technology. The device includes a water tank, with a main slide plate slidably mounted at the tank opening. Multiple auxiliary slide plates are slidably mounted on the main slide plate at intervals. Each auxiliary slide plate has a sealing cylinder fixed at one end and a positioning clamp at the other end. A sealing cap with an inflation head is fixed to the output shaft of the sealing cylinder. A push rod is fixed to the end of each auxiliary slide plate, passing through a sliding seat on the main slide plate and connecting to a push plate. A return spring is sleeved on the push rod. A rodless cylinder is located at the end of the main slide plate, with a first propulsion cylinder fixed to its slider. The output shaft of the first propulsion cylinder can contact the push plate. This invention allows for batch water immersion for bubble observation. When a leak is detected, each auxiliary slide plate is sequentially pushed into the water for individual precise inspection, accurately locating the leaking component, thus combining efficient detection and precise positioning functions.

Description

Technical Field

[0001] This invention relates to the field of filter processing, and more specifically, to an oil filter sealing performance testing device and testing method. Background Technology

[0002] As a key component of the internal combustion engine lubrication system, the oil filter's sealing performance directly affects the engine's operational safety and lifespan. If the filter has sealing defects, it will lead to oil leakage, pressure drop, and even serious mechanical failure. Therefore, a rigorous airtightness test must be performed on the filter before it leaves the factory.

[0003] Currently, the most widely used testing method in the industry is the water test, which involves filling the filter with gas at a certain pressure, then immersing the entire filter in a water tank, and judging the seal by observing whether bubbles are continuously generated in the water. To improve testing efficiency, existing automated testing equipment generally adopts a batch testing mode, which uses a drive mechanism (such as a large lifting cylinder) to simultaneously press multiple filters fixed on the same mounting plate into the water tank for observation.

[0004] However, the aforementioned batch testing device has significant technical flaws in practical applications: when a filter in the same batch has a slight leak, bubbles will emerge from that workpiece, but operators cannot accurately distinguish which specific workpiece is the source of the leak. Because all workpieces are located underwater at the same level and in close proximity, the rising paths of the bubbles are easily confused, especially when multiple workpieces show different degrees of leakage simultaneously, resulting in a very high misjudgment rate. To solve this problem, operators can only remove all workpieces in the entire batch, re-clamp them one by one, and re-test them individually in water. This not only interrupts the testing process and greatly reduces production efficiency but also increases the risk of workpiece damage from repeated clamping, completely negating the high efficiency that batch testing should possess.

[0005] In view of the shortcomings of the existing technology, there is an urgent need in the field for a detection device that can maintain high efficiency in batch testing and can quickly and accurately locate the problematic workpiece when a leak occurs. Summary of the Invention

[0006] The purpose of this invention is to provide an oil filter sealing test device and test method. After one clamping, the device can complete batch observation and isolation re-inspection of problematic workstations one by one, which significantly improves the test accuracy and production efficiency and avoids repetitive work caused by misjudgment.

[0007] To achieve the above objectives, the present invention provides an oil filter sealing performance testing device, the oil filter sealing performance testing device including a water tank, a main slide plate slidably disposed at the opening of the water tank, and auxiliary slide plates slidably disposed at intervals on the main slide plate, a sealing cylinder fixed at one end of the auxiliary slide plate, and a positioning clamp for fixing the filter disposed at the other end, a sealing cover fixed on the output shaft of the sealing cylinder, and an air inlet disposed on the sealing cover; A push rod is fixed to the end of the auxiliary slide plate, a sliding seat is provided on the main slide plate, the push rod passes through the sliding seat and is connected to a push plate, a return spring is sleeved on the push rod, a rodless cylinder is provided at the end of the main slide plate, a first propulsion cylinder is fixed on the slider of the rodless cylinder, and the output shaft of the first propulsion cylinder can contact the push plate. Preferably, a slide rail is formed on the main slide plate, and a slider that cooperates with the slide rail is formed on the bottom of the secondary slide plate.

[0008] Preferably, an air intake pipe is fixed on the main slide plate, and the inflation head is connected to the air intake pipe through a hose.

[0009] Preferably, the secondary slide plate is provided with a guide ring, and the hose passes through the guide ring at least partially.

[0010] Preferably, the side of the water tank is fixed with an inclined support frame, and the main slide plate is slidably mounted on the support frame.

[0011] Preferably, a second propulsion cylinder is fixed on the support frame, and the output shaft of the second propulsion cylinder is connected to the main slide plate via a connecting rod.

[0012] Preferably, the bottom of the water tank is provided with a drain outlet, and a drain valve is connected to the drain outlet.

[0013] Preferably, a sealing gasket is provided inside the sealing cover, and the sealing gasket is interference-fitted with the port of the filter.

[0014] Preferably, the positioning fixture includes an end plate and a plurality of U-shaped clamping plates, the filter is engaged in the U-shaped clamping plates, and the sealing cylinder presses the filter against the surface of the end plate.

[0015] This invention also provides a method for testing the sealing performance of an oil filter, using the oil filter sealing performance testing device described above, characterized by comprising the following steps: Multiple filters are clamped onto each of the auxiliary slide plates, sealed and inflated. The main slide plate is then driven to immerse all filters in the water tank simultaneously to observe for bubbles. If bubbles are observed, the main slide plate is reset. Then, the first propulsion cylinder is driven by a rodless cylinder to push each auxiliary slide plate in sequence, so that each filter is immersed in the water tank one by one to observe for bubbles, thus identifying the specific filter that is leaking.

[0016] This invention provides an oil filter sealing performance testing device and method. In the first stage, the main slide plate drives all auxiliary slide plates to simultaneously enter the water, enabling multiple filters to undergo initial sealing performance testing simultaneously. The testing efficiency is comparable to traditional batch testing equipment, meeting the urgent need for high efficiency in production lines. When abnormal air bubbles are found during the initial batch testing, it is not necessary to remove all filters from the fixture and re-clamp them. Instead, the process proceeds directly to the second stage—using a rodless cylinder and a first propulsion cylinder to independently push each auxiliary slide plate into the water in a predetermined order for individual observation. In this invention, each auxiliary slide plate has an independent push rod at its end. The push rod passes through a sliding seat and connects to a push plate, with a return spring sleeved on the push rod. When the first propulsion cylinder pushes against the push plate, the auxiliary slide plate moves smoothly along the main slide plate. When the first propulsion cylinder retracts, the return spring uses its own elasticity to automatically and accurately return the auxiliary slide plate to its initial position. During this process, operators can clearly and definitively determine which specific filter the bubble originated from, completely solving the technical problem in traditional batch testing where multiple workpieces are simultaneously located under the same water surface, causing the bubble's rising path to intersect and become confused, making it impossible to accurately locate the leak.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a structural diagram of the oil filter sealing performance testing device provided by the present invention; Figure 2 This is a side view of the oil filter sealing performance testing device provided by the present invention; Figure 3 This is a partial structural diagram of the oil filter sealing performance testing device provided by the present invention.

[0019] Explanation of reference numerals in the attached figures 1-Water tank; 2-Support frame; 3-Main slide plate; 4-Connecting rod; 5-Second propulsion cylinder; 6-Rodless cylinder; 7-First propulsion cylinder; 8-Intake pipe; 9-Slide rail; 10-Sliding seat; 11-Push rod; 12-Reset spring; 13-Push plate; 14-Blocking cylinder; 15-Blocking cover; 16-Guide ring; 17-Secondary slide plate; 18-Positioning fixture. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0021] like Figure 1-3 As shown: This invention provides an oil filter sealing performance testing device, which includes a water tank 1. A main slide plate 3 is slidably disposed at the opening of the water tank 1. A secondary slide plate 17 is slidably disposed on the main slide plate 3 at intervals. A sealing cylinder 14 is fixed to one end of the secondary slide plate 17, and a positioning clamp 18 for fixing the filter is disposed at the other end. A sealing cover 15 is fixed to the output shaft of the sealing cylinder 14, and an air inlet is disposed on the sealing cover 15. A push rod 11 is fixed to the end of the secondary slide plate 17. A sliding seat 10 is disposed on the main slide plate 3. The push rod 11 passes through the sliding seat 10 and is connected to a push plate 13. A return spring 12 is sleeved on the push rod 11. A rodless cylinder 6 is disposed at the end of the main slide plate 3. A first propulsion cylinder 7 is fixed to the slider of the rodless cylinder 6. The output shaft of the first propulsion cylinder 7 can contact the push plate 13. In the first stage, the main slide plate drives all the auxiliary slide plates to simultaneously enter the water, enabling multiple filters to undergo initial sealing checks at the same time. The testing efficiency is comparable to traditional batch testing equipment, meeting the production line's urgent need for high efficiency. When abnormal bubbles are detected during the initial batch inspection, it is not necessary to remove all filters from the fixture and re-clamp them. Instead, the process proceeds directly to the second stage—using a rodless cylinder and a first propulsion cylinder to independently push each auxiliary slide plate into the water in a predetermined order for individual observation. In this invention, each auxiliary slide plate has an independent push rod at its end, which passes through a sliding seat and connects to a push plate. A return spring is sleeved on the push rod. When the first propulsion cylinder pushes against the push plate, the auxiliary slide plate moves smoothly along the main slide plate. When the first propulsion cylinder retracts, the return spring uses its own elasticity to automatically and accurately return the auxiliary slide plate to its initial position. During this process, the operator can clearly and definitively determine which specific filter the bubble originated from, completely solving the technical problem in traditional batch testing where multiple workpieces are simultaneously located under the same water surface, and the rising paths of bubbles intersect and become confused, making it impossible to accurately locate the leak.

[0022] In a preferred embodiment of the present invention, in order to make the sliding of the secondary slide plate relative to the main slide plate more stable and the guidance more precise, a slide rail 9 is formed on the main slide plate 3, and a slider that cooperates with the slide rail 9 is formed at the bottom of the secondary slide plate 17.

[0023] In a preferred embodiment of the present invention, an air inlet pipe 8 is fixed on the main slide plate 3, and the inflation head is connected to the air inlet pipe 8 via a flexible hose. By fixing the air inlet pipe on the main slide plate and connecting the inflation head to it via a flexible hose, the gas delivery pipeline is centrally arranged on the main slide plate, avoiding excessive bending or tangling of the flexible hose due to frequent movement of the auxiliary slide plate, simplifying the pipeline layout, and improving the stability and service life of the gas supply system.

[0024] In a preferred embodiment of the present invention, a guide ring 16 is provided on the secondary slide plate 17, and the hose passes through the guide ring 16 at least partially. By providing a guide ring on the secondary slide plate and allowing the hose to pass through the guide ring at least partially, the movement path of the hose is effectively constrained.

[0025] In a preferred embodiment of the present invention, an inclined support frame 2 is fixed to the side of the water tank 1, and the main slide plate 3 is slidably mounted on the support frame 2. By fixing the inclined support frame to the side of the water tank, the main slide plate slides in an inclined direction, allowing the filter to enter and exit the water surface at an inclined posture. Compared with vertical lifting, inclined entry into the water can effectively reduce water surface ripples and splashing, while also facilitating the concentration and observation of air bubbles, thus improving the accuracy of the test results.

[0026] In a preferred embodiment of the present invention, a second propulsion cylinder 5 is fixed on the support frame 2, and the output shaft of the second propulsion cylinder 5 is connected to the main slide plate 3 through a connecting rod 4.

[0027] In a preferred embodiment of the present invention, in order to facilitate drainage, a drain outlet is provided at the bottom of the water tank 1, and a drain valve is connected to the drain outlet.

[0028] In a preferred embodiment of the present invention, in order to improve the airtightness of the sealing cap 15, a sealing gasket is provided inside the sealing cap 15, and the sealing gasket is interference-fitted with the port of the filter.

[0029] In a preferred embodiment of the present invention, in order to facilitate fixing the filter, the positioning clamp 18 includes an end plate and a plurality of U-shaped clamping plates, the filter is engaged in the U-shaped clamping plates, and the sealing cylinder 14 presses the filter tightly against the surface of the end plate.

[0030] This invention also provides a method for testing the sealing performance of an oil filter, using the oil filter sealing performance testing device described above. The method includes the following steps: clamping multiple filters onto each of the auxiliary slide plates 17, sealing and inflating them, then driving the main slide plate 3 to simultaneously immerse all filters in the water tank 1 to observe bubbles; if bubbles are observed, the main slide plate 3 is reset, and then the rodless cylinder 6 drives the first propulsion cylinder 7 to sequentially push each of the auxiliary slide plates 17, allowing each filter to be individually immersed in the water tank 1 to observe bubbles, thereby identifying the specific leaking filter.

[0031] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0032] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0033] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. An engine oil filter tightness testing device characterized by comprising: The oil filter sealing test device includes a water tank (1), a main slide plate (3) slidably disposed at the opening of the water tank (1), and auxiliary slide plates (17) slidably disposed at intervals on the main slide plate (3). A sealing cylinder (14) is fixed at one end of the auxiliary slide plate (17), and a positioning clamp (18) for fixing the filter is disposed at the other end. A sealing cover (15) is fixed on the output shaft of the sealing cylinder (14), and an air inlet is disposed on the sealing cover (15). A push rod (11) is fixed at the end of the plate (17). A sliding seat (10) is provided on the main slide plate (3). The push rod (11) passes through the sliding seat (10) and is connected to the push plate (13). A return spring (12) is sleeved on the push rod (11). A rodless cylinder (6) is provided at the end of the main slide plate (3). A first propulsion cylinder (7) is fixed on the slider of the rodless cylinder (6). The output shaft of the first propulsion cylinder (7) can contact the push plate (13).

2. The engine oil filter tightness testing device according to claim 1, characterized by A slide rail (9) is formed on the main slide plate (3), and a slider that cooperates with the slide rail (9) is formed on the bottom of the secondary slide plate (17).

3. The engine oil filter tightness testing device according to claim 2, characterized by An air inlet pipe (8) is fixed on the main slide plate (3), and the inflation head is connected to the air inlet pipe (8) through a hose.

4. The engine oil filter tightness testing device according to claim 3, characterized by The sub-slide plate (17) is provided with a guide ring (16), and the hose passes through the guide ring (16) at least partially.

5. The engine oil filter leak test apparatus of claim 4 wherein, The water tank (1) is fixed with an inclined support frame (2) on its side, and the main slide plate (3) is slidably mounted on the support frame (2).

6. The engine oil filter leak detection apparatus of claim 5, wherein, The support frame (2) is fixed with a second propulsion cylinder (5), and the output shaft of the second propulsion cylinder (5) is connected to the main slide plate (3) through a connecting rod (4).

7. The engine oil filter seal integrity testing device of claim 1, wherein, The bottom of the water tank (1) is provided with a drain outlet, and a drain valve is connected to the drain outlet.

8. The engine oil filter seal integrity testing device of claim 1, wherein, The sealing cover (15) is provided with a sealing gasket, which is interference-fitted with the port of the filter.

9. The engine oil filter seal integrity testing device of claim 1, wherein, The positioning clamp (18) includes an end plate and multiple U-shaped clamps. The filter is engaged in the U-shaped clamps, and the sealing cylinder (14) presses the filter against the surface of the end plate.

10. A method of detecting the tightness of an oil filter, using the oil filter tightness detection device according to any one of claims 1 to 9, characterized by, Includes the following steps: Multiple filters are clamped onto each of the sub-slide plates (17), sealed and inflated, and then the main slide plate (3) is driven to immerse all filters in the water tank (1) at the same time to observe the bubbles. If bubbles are observed, the main slide plate (3) is reset, and then the first propulsion cylinder (7) is driven by the rodless cylinder (6) to push each sub-slide plate (17) in sequence, so that each filter is immersed in the water tank (1) one by one to observe the bubbles, in order to determine the specific filter that is leaking.

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