Sealing flange structure of oil return filter

Abstract

The utility model discloses an oil return filter sealing flange structure which comprises a first flange face arranged on an inlet pipe of an oil return filter and a second flange face arranged on an oil return pipeline, a center sealing washer is arranged between the first flange face and the second flange face, and a first sealing washer is embedded in the back face of the first flange face. A first gasket pressing plate is arranged on the back face of the second sealing gasket, a second sealing gasket is embedded in the back face of the second flange face, a second gasket pressing plate is arranged on the back face of the second sealing gasket, and a plurality of screws are arranged on the front face of the first gasket pressing plate in the circumferential direction. The screw sequentially penetrates through the first sealing washer, the first flange face, the center sealing washer, the second flange face, the second sealing washer and the second washer pressing plate and then is locked through a nut. Compared with a traditional flange structure, the sealing flange structure of the oil return filter is more stable in connection and better in sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of oil return filters, in particular to a sealing flange structure of an oil return filter. Background Art

[0002] The return oil filter is a filtering device installed on the return oil pipeline of the hydraulic system. Its function is to capture the pollutants generated in the system before they return to the oil tank, thereby controlling the concentration of pollutants. It can effectively filter out pollutants such as metal particles generated by component wear and rubber impurities caused by seal wear in the hydraulic system, ensuring that the oil flowing back to the oil tank remains clean.

[0003] The return oil filter inlet pipe and the return oil pipeline are usually connected by a flange, and a sealing gasket is set between the flange connection surfaces to increase the sealing performance and avoid leakage.

[0004] Chinese patent CN202220521993.7 discloses a wear-resistant filter body, including a filter housing and a liquid inlet and a liquid outlet connected to the filter housing, a docking flange is connected to the top of the filter housing, a detachable sealing cover is connected to the docking flange, and a filter basket is installed in the filter housing; the inner cavity of the filter housing is provided with a limiting recess that cooperates with the outer side of the bottom of the filter basket, the bottom of the filter basket is provided with a circular groove, and the inner cavity of the filter housing is provided with a sewage discharge piece used in conjunction with the circular groove.

[0005] The liquid inlet in the wear-resistant filter body adopts an ordinary flange structure. After the flange is connected to the return oil pipeline, there are two possible leakage positions, the first is between the flange surfaces, and the second is the through-hole positions on the two flange surfaces. The prior art only uses sealing gaskets between the flange surfaces to solve the sealing problem. However, it is found in use that there is still a certain leakage at the through-hole positions on the two flange surfaces. Therefore, it is necessary to strengthen the sealing of the flange connection position of the return oil filter. Utility Model Content

[0006] The utility model aims to provide a sealing flange structure for an oil return filter. Compared with a traditional flange structure, the sealing flange structure for the oil return filter has a more stable connection and better sealing performance.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a return oil filter sealing flange structure, including a first flange surface arranged on the return oil filter inlet pipe and a second flange surface arranged on the return oil pipeline, a center sealing gasket is arranged between the first flange surface and the second flange surface, a first sealing gasket is embedded in the back of the first flange surface, a first gasket pressure plate is arranged on the back of the second sealing gasket, a second sealing gasket is embedded in the back of the second flange surface, a second gasket pressure plate is arranged on the back of the second sealing gasket, and a plurality of screws are arranged circumferentially on the front of the first gasket pressure plate, and the screws sequentially penetrate the first sealing gasket, the first flange surface, the center sealing gasket, the second flange surface, the second sealing gasket and the second gasket pressure plate and are then locked by nuts.

[0008] Preferably, the first sealing gasket and the first gasket pressure plate are both symmetrically arranged in two halves, each half of the first sealing gasket is provided with a first positioning hole at both ends, and each half of the first gasket pressure plate is provided with a first positioning column that can be inserted into the first positioning hole.

[0009] Preferably, a first positioning groove coaxial with the first positioning hole is provided on the back side of the first flange surface, and a first positioning cylinder coaxial with the first positioning groove and capable of being fitly inserted into the first positioning groove is provided on the front side of the first sealing gasket.

[0010] Preferably, the first sealing gasket is provided with a plurality of first through holes for the screw to pass through, the first flange surface is provided with a plurality of second through holes for the screw to pass through, and the center sealing gasket is provided with a plurality of third through holes for the screw to pass through.

[0011] Preferably, a first limiting ring is provided on the front side of the first sealing gasket at both sides of the plurality of first through holes, a first limiting groove which is embedded and matched with the first limiting ring is provided on the back side of the first flange surface, and first limiting edge rings which are engaged with the back side of the first sealing gasket are provided on both sides of the front side of the first gasket pressure plate.

[0012] Preferably, the second sealing gasket and the second gasket pressure plate are both symmetrically arranged in two halves, each half of the second sealing gasket is provided with a second positioning hole at both ends, and each half of the second gasket pressure plate is provided with a second positioning column that can be inserted into the second positioning hole.

[0013] Preferably, a second positioning groove coaxial with the second positioning hole is provided on the back side of the second flange surface, and a second positioning cylinder coaxial with the second positioning groove and capable of being fitly inserted into the second positioning groove is provided on the front side of the second sealing gasket.

[0014] Preferably, the second sealing gasket is provided with a plurality of fourth through holes for the screw to pass through, the second flange surface is provided with a plurality of fifth through holes for the screw to pass through, and the second gasket pressure plate is provided with a plurality of sixth through holes for the screw to pass through.

[0015] Preferably, a second limiting ring is provided on the front side of the second sealing gasket at both sides of the plurality of fourth through holes, a second limiting groove which is embedded and matched with the second limiting ring is provided on the back side of the second flange surface, and second limiting edge rings which are engaged with the back side of the second sealing gasket are provided on both sides of the front side of the second gasket pressure plate.

[0016] According to the above technical scheme, the utility model provides a return oil filter sealing flange structure, including a first flange surface arranged on the return oil filter inlet pipe and a second flange surface arranged on the return oil pipeline, a center sealing gasket is arranged between the first flange surface and the second flange surface, a first sealing gasket is embedded in the back of the first flange surface, a first gasket pressure plate is arranged on the back of the second sealing gasket, a second sealing gasket is embedded in the back of the second flange surface, a second gasket pressure plate is arranged on the back of the second sealing gasket, and a plurality of screws are arranged circumferentially on the front of the first gasket pressure plate, and the screws sequentially penetrate the first sealing gasket, the first flange surface, the center sealing gasket, the second flange surface, the second sealing gasket and the second gasket pressure plate and are then locked by nuts.

[0017] The use method and beneficial effect of the sealing flange structure of the return oil filter are as follows: the screw rod sequentially penetrates the first sealing gasket, the first flange surface, the center sealing gasket, the second flange surface, the second sealing gasket and the second gasket pressing plate and is then locked by a nut. Due to the adoption of such a structure, on the one hand, the center sealing gasket arranged between the first flange surface and the second flange surface is pressed tightly, and the sealing of the middle position is achieved through the center sealing gasket; on the other hand, the first sealing gasket is pressed tightly against the back of the first flange surface by the first gasket pressing plate to achieve the sealing at the back of the first flange surface; on the third hand, the second sealing gasket is pressed tightly against the back of the second flange surface by the second gasket pressing plate to achieve the sealing at the back of the second flange surface, thereby achieving all-round sealing on three sides and improving the sealing effect of the flange connection at the inlet end of the return oil filter. In addition, multiple screw rods are simultaneously fixed to the front of the first gasket pressing plate, so that the screw rods have a mutual restraint effect, making the flange connection more stable.

[0018] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0020] Figure 1 It is a connection schematic diagram of a preferred implementation of the sealing flange structure of the oil return filter;

[0021] Figure 2 yes Figure 1 Disassembly diagram from the first perspective;

[0022] Figure 3 yes Figure 1 Another disassembly diagram from another perspective;

[0023] Figure 4 It is a front view of a preferred embodiment of the sealing flange structure of the oil return filter;

[0024] Figure 5 yes Figure 4 Schematic diagram of the AA cross-section structure.

[0025] Description of Reference Numerals

[0026] 1-return oil pipeline; 2-screw; 3-nut; 4-second gasket pressure plate; 5-return oil filter inlet pipe; 6-first gasket pressure plate; 7-first flange surface; 8-center sealing gasket; 9-second flange surface; 10-sixth through hole; 11-second sealing gasket; 12-fourth through hole; 13-second positioning hole; 14-second limiting groove; 15-second positioning groove; 16-third through hole; 17-second through hole; 18-first positioning cylinder; 19-first limiting ring; 20-first through hole; 21-first limiting edge ring; 22-first positioning column; 23-first positioning hole; 24-first limiting groove; 25-first positioning groove; 26-second limiting ring; 27-second positioning cylinder; 28-second limiting edge ring; 29-second positioning column; 30-fifth through hole; 31-first sealing gasket. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0028] In the present utility model, unless otherwise stated, directional words contained in terms such as "up, down, left, right, front, back, inside, outside" merely represent the orientation of the terms in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the terms.

[0029] See also Figure 1-5The oil return filter sealing flange structure shown includes a first flange surface 7 arranged on the oil return filter inlet pipe 5 and a second flange surface 9 arranged on the oil return pipeline 1, a center sealing gasket 8 is arranged between the first flange surface 7 and the second flange surface 9, a first sealing gasket 31 is embedded on the back of the first flange surface 7, a first gasket pressing plate 6 is arranged on the back of the second sealing gasket 11, a second sealing gasket 11 is embedded on the back of the second flange surface 9, a second gasket pressing plate 4 is arranged on the back of the second sealing gasket 11, and a plurality of screws 2 are arranged circumferentially on the front of the first gasket pressing plate 6, and the screws 2 sequentially penetrate the first sealing gasket 31, the first flange surface 7, the center sealing gasket 8, the second flange surface 9, the second sealing gasket 11 and the second gasket pressing plate 4 and are then locked by nuts 3.

[0030] Through the implementation of the above technical solution, when in use, the screw rod 2 sequentially penetrates the first sealing gasket 31, the first flange surface 7, the center sealing gasket 8, the second flange surface 9, the second sealing gasket 11 and the second gasket pressing plate 4 and is then locked by the nut 3. Due to the adoption of such a structure, on the one hand, the center sealing gasket 8 arranged between the first flange surface 7 and the second flange surface 9 is pressed, and the sealing of the middle position is achieved through the center sealing gasket 8; on the other hand, the first sealing gasket 31 is pressed against the back of the first flange surface 7 by the first gasket pressing plate 6 to achieve the sealing at the back of the first flange surface 7; on the third hand, the second sealing gasket 11 is pressed against the back of the second flange surface 9 by the second gasket pressing plate 4 to achieve the sealing at the back of the second flange surface 9, thereby achieving all-round sealing on three sides and improving the sealing effect of the flange connection at the inlet end of the return oil filter. In addition, multiple screw rods 2 are simultaneously fixed to the front of the first gasket pressing plate 6, so that the screw rods 2 have a mutual restraint effect, making the flange connection more stable.

[0031] In this embodiment, the first sealing gasket 31 and the first gasket pressing plate 6 are both symmetrically arranged in two halves, and both ends of each half of the first sealing gasket 31 are provided with first positioning holes 23, and each half of the first gasket pressing plate 6 is provided with a first positioning column 22 that can be inserted into the first positioning hole 23. With such an arrangement, the first sealing gasket 31 and the first gasket pressing plate 6 are easier to disassemble, and when assembling, it is only necessary to clamp the first sealing gasket 31 and the first gasket pressing plate 6 of the two halves on the inlet pipe 5 of the return oil filter, and insert the corresponding first positioning column 22 into the first positioning hole 23 for quick alignment.

[0032] In this embodiment, in order to enable the first sealing gasket 31 and the first gasket pressing plate 6 to be quickly aligned with the first flange surface 7, a first positioning groove 25 coaxial with the first positioning hole 23 is provided on the back of the first flange surface 7, and a first positioning cylinder 18 coaxial with the first positioning groove 25 and capable of being inserted into the first positioning groove 25 is provided on the front of the first sealing gasket 31. During assembly, the first positioning cylinder 18 can be quickly positioned by inserting it into the corresponding first positioning groove 25, and in addition, the first positioning column 22 is also correspondingly extended into the first positioning cylinder 18 for positioning.

[0033] In this embodiment, in order to accommodate the passage of bolts, the first sealing gasket 31 is provided with a plurality of first through holes 20 for the screw rod 2 to pass through, the first flange surface 7 is provided with a plurality of second through holes 17 for the screw rod 2 to pass through, and the center sealing gasket 8 is provided with a plurality of third through holes 16 for the screw rod 2 to pass through.

[0034] In this embodiment, a first limiting ring 19 is respectively provided on both sides of the plurality of first through holes 20 on the front side of the first sealing gasket 31, a first limiting groove 24 is provided on the back side of the first flange surface 7 to be embedded and matched with the first limiting ring 19, and first limiting edge rings 21 are provided on both sides of the front side of the first gasket pressing plate 6 to be engaged with the back side of the first sealing gasket 31. The first limiting ring 19 and the first limiting groove 24 are matched to make the first sealing gasket 31 more stably assembled, and the sealing performance can also be improved. The function of the first limiting edge ring 21 is to protect the first sealing gasket 31.

[0035] In this embodiment, the second sealing gasket 11 and the second gasket pressing plate 4 are both symmetrically arranged in two halves, and both ends of each half of the second sealing gasket 11 are provided with second positioning holes 13, and each half of the second gasket pressing plate 4 is provided with a second positioning column 29 that can be inserted into the second positioning hole 13. With such an arrangement, the second sealing gasket 11 and the second gasket pressing plate 4 are easier to disassemble, and when assembling, it is only necessary to clamp the second sealing gasket 11 and the second gasket pressing plate 4 of the two halves on one end of the oil return pipeline 1 close to the second flange surface 9, and insert the corresponding second positioning column 29 into the second positioning hole 13 for quick alignment.

[0036] In this embodiment, in order to enable the second sealing gasket 11 and the second gasket pressing plate 4 to be quickly aligned with the second flange surface 9, a second positioning groove 15 coaxial with the second positioning hole 13 is provided on the back of the second flange surface 9, and a second positioning cylinder 27 coaxial with the second positioning groove 15 and capable of being inserted into the second positioning groove 15 is provided on the front of the second sealing gasket 11. During assembly, the second positioning cylinder 27 can be quickly positioned by inserting it into the corresponding second positioning groove 15, and in addition, the second positioning column 29 is also correspondingly extended into the second positioning cylinder 27 for positioning.

[0037] In this embodiment, in order to accommodate the passage of bolts, the second sealing gasket 11 is provided with a plurality of fourth through holes 12 for the screw rod 2 to pass through, the second flange surface 9 is provided with a plurality of fifth through holes 30 for the screw rod 2 to pass through, and the second gasket pressure plate 4 is provided with a plurality of sixth through holes 10 for the screw rod 2 to pass through.

[0038] In this embodiment, a second limiting ring 26 is respectively provided on both sides of the plurality of fourth through holes 12 on the front side of the second sealing gasket 11, a second limiting groove 14 is provided on the back side of the second flange surface 9 to be embedded and matched with the second limiting ring 26, and second limiting edge rings 28 are provided on both sides of the front side of the second gasket pressing plate 4 to be engaged with the back side of the second sealing gasket 11. The cooperation between the second limiting ring 26 and the second limiting groove 14 enables the second sealing gasket 11 to be assembled more stably, and also improves the sealing performance. The function of the second limiting edge ring 28 is to protect the second sealing gasket 11.

[0039] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0040] 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 utility model will not further describe various possible combinations.

[0041] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A sealing flange structure of an oil return filter, characterized in that: The oil return filter sealing flange structure comprises a first flange surface (7) arranged on the oil return filter inlet pipe (5) and a second flange surface (9) arranged on the oil return pipeline (1); a central sealing gasket (8) is arranged between the first flange surface (7) and the second flange surface (9); a first sealing gasket (31) is embedded on the back of the first flange surface (7); a first gasket pressing plate (6) is arranged on the back of the second sealing gasket (11); a second sealing gasket (11) is embedded on the back of the second flange surface (9); a second gasket pressing plate (4) is arranged on the back of the second sealing gasket (11); a plurality of screw rods (2) are arranged circumferentially on the front of the first gasket pressing plate (6); the screw rods (2) sequentially penetrate the first sealing gasket (31), the first flange surface (7), the central sealing gasket (8), the second flange surface (9), the second sealing gasket (11) and the second gasket pressing plate (4) and are then locked by nuts (3).

2. The oil return filter sealing flange structure according to claim 1, characterized in that: The first sealing gasket (31) and the first gasket pressing plate (6) are both symmetrically arranged two half structures; Both ends of each half of the first sealing gasket (31) are provided with first positioning holes (23); Each half of the first washer pressing plate (6) is provided with a first positioning column (22) capable of being inserted into the first positioning hole (23).

3. The oil return filter sealing flange structure according to claim 2 is characterized in that: A first positioning groove (25) coaxial with the first positioning hole (23) is provided on the back side of the first flange surface (7), and a first positioning cylinder (18) coaxial with the first positioning groove (25) and capable of being inserted into the first positioning groove (25) is provided on the front side of the first sealing gasket (31).

4. The oil return filter sealing flange structure according to claim 3, characterized in that: The first sealing gasket (31) is provided with a plurality of first through holes (20) for the screw rod (2) to pass through, the first flange surface (7) is provided with a plurality of second through holes (17) for the screw rod (2) to pass through, and the center sealing gasket (8) is provided with a plurality of third through holes (16) for the screw rod (2) to pass through.

5. The oil return filter sealing flange structure according to claim 4, characterized in that: A first limiting ring (19) is provided on the front side of the first sealing gasket (31) at both sides of the plurality of first through holes (20), a first limiting groove (24) embedded and matched with the first limiting ring (19) is provided on the back side of the first flange surface (7), and first limiting edge rings (21) engaged with the back side of the first sealing gasket (31) are provided on both sides of the front side of the first gasket pressure plate (6).

6. The oil return filter sealing flange structure according to claim 1, characterized in that: The second sealing gasket (11) and the second gasket pressing plate (4) are both symmetrically arranged two half structures; Both ends of each half of the second sealing gasket (11) are provided with second positioning holes (13); Each half of the second washer pressing plate (4) is provided with a second positioning column (29) capable of being inserted into the second positioning hole (13).

7. The oil return filter sealing flange structure according to claim 6, characterized in that: The back side of the second flange surface (9) is provided with a second positioning groove (15) coaxial with the second positioning hole (13), and the front side of the second sealing gasket (11) is provided with a second positioning cylinder (27) coaxial with the second positioning groove (15) and capable of being inserted into the second positioning groove (15).

8. The oil return filter sealing flange structure according to claim 7, characterized in that: The second sealing gasket (11) is provided with a plurality of fourth through holes (12) for the screw rod (2) to pass through, the second flange surface (9) is provided with a plurality of fifth through holes (30) for the screw rod (2) to pass through, and the second gasket pressure plate (4) is provided with a plurality of sixth through holes (10) for the screw rod (2) to pass through.

9. The oil return filter sealing flange structure according to claim 8, characterized in that: A second limiting ring (26) is provided on the front side of the second sealing gasket (11) at both sides of the plurality of fourth through holes (12), a second limiting groove (14) is provided on the back side of the second flange surface (9) and is embedded and matched with the second limiting ring (26), and second limiting edge rings (28) are provided on both sides of the front side of the second gasket pressure plate (4) and are engaged with the back side of the second sealing gasket (11).

Images