Coalescence and separation integrated filter element

Abstract

The utility model discloses a coalescence and separation integrated filter element, which comprises a support structure, an inner framework and an outer framework, the outer framework and the inner framework are both of a reel-shaped structure, the diameter of the inner framework is smaller than that of the outer framework, the height of the inner framework is smaller than that of the outer framework, and the inner framework is arranged in the outer framework in an embedded mode. The two ends of the supporting frame are fixed to the top ends of the inner framework and the outer framework, so that the inner framework and the outer framework are coaxially arranged, an inner cavity is formed in the inner framework, and an outer cavity is formed in a gap between the inner framework and the outer framework. The sealing structure comprises an upper end cover, a lower inner end cover and a lower outer end cover. The upper end cover is arranged at the top end of the outer framework and is provided with a first through hole, so that the inner cavity is communicated with the outside; the lower inner end cover is arranged at the bottom end of the inner framework and seals the bottom of the inner framework; and the lower outer end cover is arranged at the bottom end of the outer framework and is provided with a second through hole, so that the outer cavity is communicated with the outside.

Description

Technical Field

[0001] The utility model relates to the technical field of filter elements, in particular to a coalescence and separation integrated filter element. Background Art

[0002] Fluid filtration and separation technology is currently widely used, and is commonly used in the filtration of petrochemical raw materials, purification of oil in engineering machinery hydraulic systems, filtration of lubricating oil in industrial hydraulic systems, etc. Coalescing separation filter elements are used in the filtration of aviation jet fuel.

[0003] The powerful power of aircraft engines comes from the continuously burning jet fuel, but if the jet fuel contains water and solid impurities, it will have an adverse effect on the operation of the aircraft engine. These phenomena may cause wear and tear, affecting the service life of the engine, or even cause the engine to stall, resulting in a serious accident with the aircraft destroyed and people killed. Therefore, controlling the pollution of jet fuel and improving the cleanliness of jet fuel are crucial to ensure flight safety and extend the service life of the engine.

[0004] The filter is usually equipped with two filter elements, which are used in combination to filter impurities and water in the fuel oil to improve the cleanliness of the fuel oil. The two filter elements are a coalescing filter element and a separation filter element.

[0005] When the filter element needs to be replaced, the coalescing filter element and the separation filter element need to be replaced at the same time. The filter element maintenance cost is high, so a new type of coalescing and separation integrated filter element is designed and applied. Utility Model Content

[0006] The utility model aims to provide a coalescence and separation integrated filter element, which reduces the filter element maintenance cost and simplifies the replacement process of the filter element.

[0007] In order to achieve the above object, the utility model provides a coalescence and separation integrated filter element, comprising:

[0008] The support structure comprises: a support frame, an inner frame and an outer frame; the outer frame and the inner frame are both roll-shaped structures, the diameter of the inner frame is smaller than the diameter of the outer frame, and the height of the inner frame is lower than the outer frame, and the inner frame is nested in the outer frame; the two ends of the support frame are fixed to the top ends of the inner frame and the outer frame, so that the inner frame and the outer frame are coaxially arranged, an inner cavity is formed inside the inner frame, and the gap between the inner frame and the outer frame forms an outer cavity; the surfaces of the inner frame and the outer frame are both provided with a plurality of through holes, so that the oil to be filtered can flow between the inner frame and the outer frame;

[0009] The filter layer is fixed on the inner wall of the inner frame and the outer wall of the outer frame;

[0010] Sealing structure, including:

[0011] An upper end cover is arranged at the top end of the outer frame; a first through hole is arranged at the center of the upper end cover so that the inner cavity is connected with the outside;

[0012] The lower inner end cover is arranged at the bottom end of the inner frame, and its diameter matches the outer diameter of the inner frame, seals the bottom of the inner frame, and blocks the inner cavity and the outer cavity;

[0013] The lower outer end cover is arranged at the bottom end of the outer frame; a second through hole is arranged at the center of the lower outer end cover to connect the outer cavity with the outside.

[0014] Optionally, the inner frame and the outer frame are both formed by rolling a perforated plate and then welding it.

[0015] Optionally, the inner surface of the upper end cover is provided with a first annular protrusion coaxial with the upper end cover; the outer diameter of the first protrusion matches the inner diameter of the inner frame, and the first protrusion is inserted into the top end of the inner frame;

[0016] The inner surface of the lower outer end cover is provided with a coaxial annular second protrusion, the outer diameter of the second protrusion matches the inner diameter of the outer frame, and the second protrusion is inserted into the bottom end of the outer frame.

[0017] Optionally, the diameter of the first through hole is smaller than the diameter of the inner skeleton; and the diameter of the second through hole is smaller than the inner diameter of the second protrusion.

[0018] Optionally, a first external thread is provided on the outer side of the first protrusion, and a first internal thread matching the first external thread is provided on the top of the inner wall of the inner frame, so as to realize a fixed connection between the upper end cover and the inner frame;

[0019] The outer side of the second protrusion is provided with a second external thread, and the bottom end of the inner wall of the outer frame is provided with a second internal thread matching the second external thread, so as to realize a fixed connection between the lower outer end cover and the outer frame;

[0020] A third internal thread is provided at the interface of the lower inner end cover, and a third external thread matching the third internal thread is provided at the bottom end of the outer wall of the inner frame, so as to realize a fixed connection between the lower inner end cover and the inner frame.

[0021] Optionally, a Teflon mesh, fixed to the inner wall of the inner frame, can intercept water in the oil to be filtered in the outer cavity;

[0022] The demulsification and coalescence layer is fixed on the outer wall of the exoskeleton and can coalesce tiny water droplets in the oil to be filtered into water beads;

[0023] The high-precision filter paper is fixed on the outside of the demulsification and coalescence layer and can filter out particulate impurities in the oil to be filtered.

[0024] Optionally, the filter layer further comprises: a gauze sleeve, which is sleeved on the outside of the high-precision filter paper and can tightly fix the demulsification and coalescence layer and the high-precision filter paper on the outside of the outer skeleton.

[0025] Optionally, the diameters of the upper end cap and the lower outer end cap are consistent with the diameter of the outer skeleton surface after being covered with a filter layer.

[0026] Optionally, the sealing structure also includes: a first sealing gasket, which is an annular structure, whose outer diameter is consistent with the diameter of the upper end cover, and whose inner diameter is smaller than the inner diameter of the outer skeleton and larger than the diameter of the first through hole, so as to prevent the oil to be filtered from directly entering the outer cavity from the top of the filter layer.

[0027] Optionally, the sealing structure also includes: a second sealing gasket, which is an annular structure, whose outer diameter is consistent with the diameter of the lower outer end cover, and whose inner diameter is smaller than the inner diameter of the outer skeleton and larger than the diameter of the second through hole, so as to prevent the oil to be filtered from directly entering the outer cavity from the bottom of the filter layer.

[0028] Compared with the prior art, the technical solution of the utility model has at least the following beneficial effects:

[0029] The utility model filter element combines filter screens for filtering solid impurities and moisture, and sets an outer cavity between the filter screens and an inner cavity in the middle of the filter element, so that solid impurities in the oil to be filtered are isolated on the outside of the filter element, and the moisture in the oil to be filtered is filtered in the outer cavity and flows out from the outer cavity, and the clean oil is discharged from the inner cavity, thereby realizing an integrated design of coalescence and separation, reducing the volume of the filter element, reducing the maintenance cost of the filter element, and simplifying the filter element replacement process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of the coalescence and separation integrated filter element of the utility model.

[0031] In the figure, 1-first sealing gasket, 2-upper end cover, 3-inner skeleton, 4-Teflon mesh, 5-external skeleton, 6-emulsification and coalescence layer, 7-high-precision filter paper, 8-knitted yarn mesh sleeve, 9-lower inner end cover, 10-lower outer end cover, 11-second sealing gasket, 12-outer cavity, 13-inner cavity. DETAILED DESCRIPTION

[0032] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] like Figure 1 The utility model provides a coalescence separation integrated filter element, comprising: a filter layer, a support structure and a sealing structure. The support structure has a cavity inside, the filter layer is fixed on the support structure, and the sealing structure is arranged at both ends of the support structure for sealing the two ends of the filter layer.

[0036] The support structure includes: a support frame, an inner frame 3, and an outer frame 5. The inner frame 3 and the outer frame 5 are both roll-shaped structures, the diameter of the inner frame 3 is smaller than the diameter of the outer frame 5, and the height of the inner frame 3 is lower than the height of the outer frame 5, so that the inner frame 3 can be nested in the outer frame 5. The two ends of the support frame are fixed to the top of the inner frame 3 and the outer frame 5, so that the inner frame 3 and the outer frame 5 are coaxially fixed together, at this time, an inner cavity 13 is formed inside the inner frame 3, and the gap between the inner frame 3 and the outer frame 5 forms an outer cavity 12. The surfaces of the inner frame 3 and the outer frame 5 are provided with a plurality of through holes, so that the oil to be filtered can flow between the inner frame and the outer frame.

[0037] In a preferred embodiment, the inner frame 3 and the outer frame 5 are both formed by rolling a perforated plate and then welding it.

[0038] The filter layer is arranged on the outer wall of the outer frame 5 and the inner wall of the inner frame 3, so that the oil to be filtered flows in from the outer side of the filter layer, passes through the filter layer, and enters the inner cavity 13 to obtain clean oil. The filter layer includes: Teflon mesh 4, demulsification and coalescence layer 6, high-precision filter paper 7, and gauze sleeve 8. The demulsification and coalescence layer 6, high-precision filter paper 7, and gauze sleeve 8 are fixed on the outer wall of the outer frame 5 in sequence, and the Teflon mesh 4 is fixed on the inner wall of the inner frame.

[0039] The high-precision filter paper 7 is made of fiber wood pulp paper and can form a filtering channel to remove particulate impurities and pollutants in the oil to be filtered.

[0040] The demulsification and coalescence layer 6 is made of glass wool and can coalesce tiny water droplets in the oil to be filtered into water beads.

[0041] The Teflon mesh 4 has good water repellency and can intercept the water in the oil to be filtered in the outer cavity 12. In a preferred embodiment, the Teflon mesh 4 is made of 304 mesh sprayed with polytetrafluoroethylene.

[0042] The gauze sleeve 8 is sleeved on the outside of the high-precision filter paper 7 , and can tightly fix the demulsification and coalescence layer 6 and the high-precision filter paper 7 on the outside of the outer frame 5 .

[0043] The sealing structure comprises: an upper end cover 2 , a lower inner end cover 9 , a lower outer end cover 10 , a first sealing gasket 1 and a second sealing gasket 11 .

[0044] The upper end cap 2 is arranged at the top of the outer frame 5, and the inner surface of the upper end cap 2 is provided with a coaxial annular first protrusion, and the outer diameter of the first protrusion matches the inner diameter of the inner frame 3, so that the first protrusion can be inserted into the top of the inner frame 3, and the inner frame 3 and the upper end cap 2 are fixed together, and the diameter of the upper end cap 2 is consistent with the diameter of the outer frame surface after the filter layer is covered. A first through hole is provided at the center of the upper end cap 2, that is, the first through hole is located inside the annular first protrusion, and the diameter of the first through hole is smaller than the diameter of the inner frame 3, so that the inner cavity 13 is connected to the outside.

[0045] The lower inner end cover 9 is arranged at the bottom end of the inner frame 3 , and its diameter matches the outer diameter of the inner frame 3 , and can seal the bottom of the inner frame 3 and block the inner cavity 13 and the outer cavity 12 .

[0046] The lower outer end cap 10 is arranged at the bottom end of the outer frame 5, and its diameter is consistent with the diameter of the outer frame surface after the filter layer is covered. The inner surface of the lower outer end cap 10 is provided with a coaxial annular second protrusion, and the outer diameter of the second protrusion matches the inner diameter of the outer frame 5, so that the second protrusion can be inserted into the bottom end of the outer frame 5 to fix the outer frame 5 and the lower outer end cap 10 together. A second through hole is provided at the center of the lower outer end cap 10, that is, the second through hole is located inside the annular second protrusion, and the diameter of the second through hole is smaller than the inner diameter of the second protrusion, so that the outer cavity 12 is connected to the outside.

[0047] Furthermore, a first external thread is provided on the outer side of the first protrusion of the upper end cover 2, and a first internal thread matching the first internal thread is provided on the top of the inner wall of the inner frame 3, so that the upper end cover 2 and the inner frame 3 can be fixedly connected. A second external thread is provided on the outer side of the second protrusion of the lower outer end cover 10, and a second internal thread matching the first internal thread is provided on the bottom end of the inner wall of the outer frame 5, so that the lower outer end cover 10 and the outer frame 5 can be fixedly connected. A third internal thread is provided at the interface of the lower inner end cover 9, and a third external thread matching the first external thread is provided on the bottom end of the outer wall of the inner frame 3, so that the lower inner end cover 9 and the inner frame 3 can be fixedly connected.

[0048] The first sealing gasket 1 is arranged at the top of the outer frame 5. The first sealing gasket 1 is an annular gasket, and its inner diameter is smaller than the inner diameter of the outer frame 5 and larger than the diameter of the first through hole; the outer diameter of the first sealing gasket 1 is the same as the diameter of the upper end cover 2, and the first sealing gasket 1 is fixed between the upper end cover 2 and the top of the filter layer through the upper end cover 2 to prevent the oil to be filtered from directly entering the outer cavity 12 from the top of the filter layer.

[0049] The second sealing gasket 11 is arranged at the bottom end of the outer frame 5. The second sealing gasket 11 is an annular structure, and its inner diameter is smaller than the inner diameter of the outer frame 5 and larger than the diameter of the second through hole; the outer diameter of the second sealing gasket 1 is the same as the diameter of the lower outer end cover 10, and the second sealing gasket 11 is fixed between the lower outer end cover 10 and the bottom end of the filter layer through the lower outer end cover 10 to prevent the oil to be filtered from directly entering the outer cavity 12 from the bottom end of the filter layer.

[0050] The filter element of the utility model is placed in the oil to be filtered, the first through hole of the upper end cover 2 is connected to the oil inlet pipe, the second through hole of the lower outer end cover 10 is connected to the drain port, and a pump body is arranged on the oil inlet pipe to pump oil, so that the pressure in the inner cavity 13 is reduced, and the oil to be filtered enters the inner cavity 13 of the inner skeleton 3 from the outside of the mesh sleeve 8. The oil to be filtered first passes through the gauze sleeve 8 and the high-precision filter paper 7 to remove the particulate impurities in the oil to be filtered; then, it passes through the demulsification and coalescence layer 6 to remove part of the water in the oil to be filtered. At this time, the removed water causes the tiny water droplets to gather into water droplets due to the effect of the glass wool. Affected by the flow direction of the oil to be filtered, the water droplets adhere to the inner wall of the demulsification and coalescence layer 6. At the same time, the water droplets fall in the outer cavity 12 due to the influence of gravity and are discharged through the second through hole of the lower outer end cover 10; the oil containing a small amount of water then passes through the Teflon mesh 4 to isolate the unremoved water on the outside of the Teflon mesh 4, so that the oil entering the inner cavity 13 is clean oil, and the clean oil flows into the oil inlet pipe through the first through hole of the upper end cover 2.

[0051] In a preferred embodiment, the outer diameter of the filter element of the utility model ranges from 100 mm to 200 mm, and the length of the filter element ranges from 300 mm to 1500 mm, which can meet the filtering needs under different working conditions and make the filtering effect reach the ideal index.

[0052] In summary, by combining the filter screens for separating particulate impurities and moisture, and setting an outer cavity 12 between the filter screens and an inner cavity 13 in the filter element, the particulate impurities in the oil to be filtered are isolated on the outside of the filter element, and the moisture in the oil to be filtered is filtered in the outer cavity 12 and flows out from the outer cavity 12, and the clean oil is discharged from the inner cavity 13, thereby realizing an integrated design of coagulation and separation, reducing the volume of the filter element, reducing the maintenance cost of the filter element, and simplifying the filter element replacement process.

[0053] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, a variety of modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be defined by the attached claims.

Claims

1. A coalescence and separation integrated filter element, characterized in that: include: The support structure comprises: a support frame, an inner frame and an outer frame; the outer frame and the inner frame are both roll-shaped structures, the diameter of the inner frame is smaller than the diameter of the outer frame, and the height of the inner frame is lower than the outer frame, and the inner frame is nested in the outer frame; the two ends of the support frame are fixed to the top ends of the inner frame and the outer frame, so that the inner frame and the outer frame are coaxially arranged, an inner cavity is formed inside the inner frame, and the gap between the inner frame and the outer frame forms an outer cavity; the surfaces of the inner frame and the outer frame are both provided with a plurality of through holes, so that the oil to be filtered can flow between the inner frame and the outer frame; The filter layer is fixed on the inner wall of the inner frame and the outer wall of the outer frame; Sealing structure, including: An upper end cover is arranged at the top end of the outer frame; a first through hole is arranged at the center of the upper end cover so that the inner cavity is connected with the outside; The lower inner end cover is arranged at the bottom end of the inner frame, and its diameter matches the outer diameter of the inner frame, seals the bottom of the inner frame, and blocks the inner cavity and the outer cavity; The lower outer end cover is arranged at the bottom end of the outer frame; a second through hole is arranged at the center of the lower outer end cover to connect the outer cavity with the outside.

2. The coalescence and separation integrated filter element according to claim 1, characterized in that: The inner frame and the outer frame are both formed by rolling a perforated plate and then welding it.

3. The coalescence and separation integrated filter element according to claim 1, characterized in that: The inner surface of the upper end cover is provided with a coaxial annular first protrusion; the outer diameter of the first protrusion matches the inner diameter of the inner frame, and the first protrusion is inserted into the top end of the inner frame; The inner surface of the lower outer end cover is provided with a coaxial annular second protrusion, the outer diameter of the second protrusion matches the inner diameter of the outer frame, and the second protrusion is inserted into the bottom end of the outer frame.

4. The coalescence and separation integrated filter element according to claim 3, characterized in that: The diameter of the first through hole is smaller than the diameter of the inner frame; the diameter of the second through hole is smaller than the inner diameter of the second protrusion.

5. The coalescence and separation integrated filter element according to claim 3, characterized in that: The first protrusion is provided with a first external thread on the outside, and the top end of the inner wall of the inner frame is provided with a first internal thread matching the first external thread, so as to realize a fixed connection between the upper end cover and the inner frame; The outer side of the second protrusion is provided with a second external thread, and the bottom end of the inner wall of the outer frame is provided with a second internal thread matching the second external thread, so as to realize a fixed connection between the lower outer end cover and the outer frame; A third internal thread is provided at the interface of the lower inner end cover, and a third external thread matching the third internal thread is provided at the bottom end of the outer wall of the inner frame, so as to realize a fixed connection between the lower inner end cover and the inner frame.

6. The coalescence and separation integrated filter element according to claim 1, characterized in that: The filter layer comprises: The Teflon mesh, fixed on the inner wall of the inner frame, can intercept the water in the oil to be filtered in the outer cavity; The demulsification and coalescence layer is fixed on the outer wall of the exoskeleton and can coalesce tiny water droplets in the oil to be filtered into water beads; The high-precision filter paper is fixed on the outside of the demulsification and coalescence layer and can filter out particulate impurities in the oil to be filtered.

7. The coalescence and separation integrated filter element according to claim 6, characterized in that: The filter layer also includes: a gauze sleeve, which is sleeved on the outside of the high-precision filter paper and can tightly fix the demulsification and coalescence layer and the high-precision filter paper on the outside of the outer frame.

8. The coalescence and separation integrated filter element according to claim 1, characterized in that: The diameters of the upper end cap and the lower outer end cap are consistent with the diameter of the outer frame surface after being covered with a filter layer.

9. The coalescence-separation integrated filter element according to claim 8, characterized in that: The sealing structure also includes: a first sealing gasket, which is an annular structure, whose outer diameter is consistent with the diameter of the upper end cover, and whose inner diameter is smaller than the inner diameter of the outer skeleton and larger than the diameter of the first through hole, so as to prevent the oil to be filtered from directly entering the outer cavity from the top of the filter layer.

10. The coalescence and separation integrated filter element according to claim 8, characterized in that: The sealing structure also includes: a second sealing gasket, which is an annular structure, whose outer diameter is consistent with the diameter of the lower outer end cover, and whose inner diameter is smaller than the inner diameter of the outer skeleton and larger than the diameter of the second through hole, so as to prevent the oil to be filtered from directly entering the outer cavity from the bottom end of the filter layer.

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