A filter leak detection device

Abstract

The application relates to the field of filter production devices, in particular to a filter sealing detection device, which comprises a bottom plate, a sliding plate arranged above the bottom plate, a feeding air cylinder fixed on the bottom plate, a piston rod tail end of the feeding air cylinder fixed with the sliding plate, fixed seats fixed on both sides of the top of the sliding plate, air nozzles fixed on the fixed seats, the air nozzles in communication with air compressors through corresponding air inlet pipes, a top plate fixed on the top of the bottom plate, a lifting air cylinder fixed on the top plate, a protective cover fixed on the piston rod tail end of the lifting air cylinder, a water tank fixed on the top plate, the protective cover connected with the water tank through a gas guide pipe, one end of the gas guide pipe arranged in the protective cover, and the other end of the gas guide pipe arranged in the water tank. The device can realize sealing detection of the filter, the filter does not need to be put into liquid, and drying treatment of the filter is not needed after detection.

Description

Technical Field

[0001] This invention relates to the field of filter production equipment, and more particularly to a filter sealing performance testing device. Background Technology

[0002] The oil filter is a filtration component of a car engine, used to remove impurities such as dust, metal particles, carbon deposits, and soot particles from the engine oil. This prevents fuel system blockage (especially of fuel injectors), reduces mechanical wear, ensures stable engine operation, improves reliability, and ultimately protects the engine. Because the oil filter is connected to the drain pipe via a threaded connection, it requires a seal test during its production process to ensure there is no oil leakage before it can be used normally.

[0003] Patent application number CN202420961367.9 discloses a fuel filter sealing test device, including a water tank and an air pump. A fixed bracket is fixedly installed above the water tank, and spring telescopic rods are symmetrically installed on the fixed bracket. A first lifting plate is fixedly installed at the bottom end of the spring telescopic rod, and a first rubber joint is fixedly installed on the first lifting plate. Hydraulic rods are symmetrically installed in the middle of the fixed bracket, and a second lifting plate is fixedly installed at the bottom end of the hydraulic rod. The second lifting plate is located above the first lifting plate, and a connecting device corresponding to the first rubber joint is installed at the bottom of the second lifting plate. The air pump is connected to the side wall of the connecting device through a hose. The filter is lowered below the water tank level, and then the air pump pressurizes the connecting sleeve. The pressurized gas passes through the connecting sleeve and enters the oil inlet or outlet of the filter. Then, the filter is observed for leaks. However, after the test is completed, the filter still needs to be dried, making the operation cumbersome.

[0004] This invention was proposed in response to the shortcomings of existing technologies. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a filter sealing performance testing device.

[0006] This invention can be achieved through the following technical solutions:

[0007] This invention discloses a filter sealing performance testing device, comprising a base plate, a sliding plate disposed above the base plate, a feeding cylinder fixed on the base plate, the piston rod end of the feeding cylinder being fixed to the sliding plate, fixing seats fixed on both sides above the sliding plate, and air nozzles fixed on the fixing seats, each air nozzle being connected to an air compressor through a corresponding air inlet pipe, a top plate also fixed above the base plate, a lifting cylinder fixed on the top plate, a protective cover fixed to the piston rod end of the lifting cylinder, and a water tank also fixed on the top plate, the protective cover being connected to the water tank through an air guide pipe, one end of the air guide pipe being disposed inside the protective cover, and the other end of the air guide pipe being disposed inside the water tank. The filter to be tested is placed upside down on the air nozzle of the mounting base, with the air nozzle inserted into the filter's opening. During testing, the lifting cylinder is activated, extending the piston rod and lowering the protective cover. Once the bottom of the cover contacts the mounting base, a sealed space is formed inside the cover, compressing and securing the filter. After the filter is secured, the air compressor discharges compressed gas into the filter through the intake pipe to test its seal. When the filter has a good seal, no air bubbles will form in the water tank. If the filter has a seal problem, compressed gas entering the cover will be trapped inside. The air tube enters the water tank. Since the tank is filled with water, the air generates bubbles upon entering, which can confirm the filter's sealing performance. While one filter is being tested, another filter is placed on a fixed base. After one filter has been tested, the feeding cylinder is activated, the slide plate moves, and the other filter to be tested arrives under the protective cover for testing. This greatly improves the filter testing efficiency. This device can perform filter sealing performance testing without immersing the filter in liquid, and no drying treatment is required after testing.

[0008] Preferably, multiple support rods are fixed above the base plate, and support tubes are fixed on the slide plate at positions corresponding to the support rods. The support rods pass through the support tubes and are slidably connected to the support tubes.

[0009] Preferably, a positioning ring is also fixed on the mounting base. The positioning ring facilitates the positioning and fixing of the filter.

[0010] Preferably, a pressure plate is also provided inside the protective cover, and the pressure plate is connected to the protective cover by a spring. The filter is fixed by the pressure plate being pressed by the spring.

[0011] Compared with existing technologies, the present invention has the following advantages:

[0012] This device can perform leak testing on filters without immersing them in liquid, and no drying is required after the test. Attached Figure Description

[0013] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a front view of the present invention;

[0016] Figure 3 for Figure 2 Sectional view at point AA;

[0017] In the diagram: 1. Base plate; 2. Support rod; 3. Feeding cylinder; 4. Slide plate; 5. Fixed base; 6. Positioning ring; 7. Air nozzle; 8. Air inlet pipe; 9. Top plate; 10. Lifting cylinder; 11. Protective cover; 12. Pressure plate; 13. Spring; 14. Water tank; 15. Air guide pipe; Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings: Example

[0019] like Figures 1 to 3As shown, this embodiment discloses a filter sealing performance testing device, including a base plate 1, a slide plate 4 above the base plate 1, a feeding cylinder 3 fixed on the base plate 1, the piston rod end of the feeding cylinder 3 fixed to the slide plate 4, a fixing seat 5 fixed on both sides above the slide plate 4, an air nozzle 7 fixed on the fixing seat 5, and the air nozzle 7 connected to an air compressor through a corresponding air inlet pipe 8. A top plate 9 is also fixed above the base plate 1, a lifting cylinder 10 is fixed on the top plate 9, a protective cover 11 is fixed to the piston rod end of the lifting cylinder 10, and a water tank 14 is also fixed on the top plate 9. The protective cover 11 is connected to the water tank 14 through an air guide pipe 15, one end of the air guide pipe 15 is placed inside the protective cover 11, and the other end of the air guide pipe 15 is placed inside the water tank 14. The filter to be tested is placed upside down on the air nozzle 7 of the fixed base 5, with the air nozzle 7 extending into the opening of the filter. During the filter test, the lifting cylinder 10 is activated, the piston rod of the lifting cylinder 10 extends, and the protective cover 11 descends. After the bottom of the protective cover 11 contacts the fixed base 5, a sealed space is formed inside the protective cover 11, and the protective cover 11 compresses and fixes the filter. After the filter is fixed, the air compressor discharges compressed gas into the filter through the air inlet pipe 8 to test the filter's sealing performance. When the filter has good sealing performance, no air bubbles will be generated in the water tank 14. When there is a problem with the filter's sealing performance, compressed gas will enter the protective cover 11, and the air... The gas enters the water tank 14 through the air guide pipe 15. Since the water tank 14 is filled with water, the gas generates bubbles after entering the water tank 14, which can confirm the airtightness of the filter. When one filter is being tested, another filter is placed on the fixed seat 5. After one filter is tested, the feeding cylinder 3 is started, the slide plate 4 moves, and another filter to be tested arrives under the protective cover 11 for testing. This greatly improves the testing efficiency of the filter. This device can realize the airtightness test of the filter without immersing the filter in liquid, and there is no need to dry the filter after the test.

[0020] Among them, multiple support rods 2 are fixed above the base plate 1, and support tubes are fixed on the slide plate 4 at positions corresponding to the support rods 2. The support rods 2 pass through the support tubes and are slidably connected to the support tubes. Example

[0021] This embodiment discloses a filter sealing performance testing device. Based on the structure and principle of Embodiment 1, this embodiment also has a positioning ring 6 fixed on the fixing base 5. By setting the positioning ring 6, it is convenient to position and fix the filter. Example

[0022] This embodiment discloses a filter sealing performance testing device. Based on the structure and principle of Embodiment 1 or Embodiment 2, this embodiment further includes a pressure plate 12 inside the protective cover 11. The pressure plate 12 is connected to the protective cover 11 via a spring 13. The spring 13 presses against the pressure plate 12, thereby fixing the filter.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A filter sealing performance testing device, characterized in that, The device includes a base plate, a sliding plate on top of the base plate, a feeding cylinder fixed on the base plate, the piston rod end of the feeding cylinder fixed to the sliding plate, a fixing seat fixed on both sides above the sliding plate, an air nozzle fixed on the fixing seat, and each air nozzle connected to an air compressor through a corresponding air inlet pipe. A top plate is also fixed above the base plate, a lifting cylinder is fixed on the top plate, a protective cover is fixed to the piston rod end of the lifting cylinder, and a water tank is also fixed on the top plate. The protective cover is connected to the water tank through an air guide pipe, one end of the air guide pipe is placed inside the protective cover, and the other end of the air guide pipe is placed inside the water tank.

2. The filter sealing performance testing device according to claim 1, characterized in that: Multiple support rods are fixed above the base plate, and support tubes are fixed on the slide plate at positions corresponding to the support rods. The support rods pass through the support tubes and are slidably connected to the support tubes.

3. The filter sealing performance testing device according to claim 1, characterized in that: A positioning ring is also fixed on the fixed base.

4. The filter sealing performance testing device according to claim 1, characterized in that: The protective cover is also equipped with a pressure plate, which is connected to the protective cover by a spring.

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