Multi-stage filtering mechanism for oil-gas separator

Abstract

The utility model discloses a multi-stage filtering mechanism for an oil-gas separator. The multi-stage filtering mechanism comprises a funnel, a first filter screen, a first filter cartridge, a second filter cartridge, a second filter screen, a rotating shaft, stirring blades, a motor, a baffle and a blow-off pipe. A first filter cartridge, a first filter screen, a second filter screen and a second filter cartridge are respectively arranged, and a mixture containing solid impurities is subjected to multi-stage filtration; stirring blades are arranged in the second filter cartridge to stir the mixture, and solid impurities are dispersed on the bottom edge and the side wall of the second filter cartridge and stored under the action of centrifugal force, so that solid-liquid separation is realized, and meanwhile, the solid impurities are stored in different areas in a classified manner; and a blow-off pipe is arranged to discharge solid impurities in the storage area in time, so that multi-stage filtration is facilitated. The multi-stage filter solves the problem that solid impurities are easy to accumulate and block on a filter medium, is simple in structure and easy to operate, and realizes multi-stage filtration.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-gas separators, in particular to a multi-stage filtering mechanism for oil-gas separators. Background Art

[0002] The exhaust gas from the compressor contains lubricating oil, which flows through the exhaust pipe into the oil-gas separator for separation. Iron filings are generated during operation. These enter the oil-gas separator and the oil return pipe along with the lubricating oil, flowing into the compressor working chamber. This increases the risk of compressor seizure and shortens the compressor's service life. Magnets are typically placed at the bottom of the oil-gas separator to absorb some of the iron filings in the lubricating oil. However, a small amount of iron filings still enter the working chamber, and this does not completely eliminate the risk of compressor seizures caused by iron filings.

[0003] For example, a Chinese invention patent application with publication number CN117547904A, dated February 13, 2024, discloses a filter device for an oil-gas separator and an oil-gas separator. The filter device includes a guide plate having an opening in the middle portion thereof, within which a solid-liquid separation plate is disposed. The solid-liquid separation plate is an annular structure, coaxially disposed with the guide plate based on an axis, and includes an opening portion having a bell-shaped shape and a straight pipe portion interconnected therewith. The lower end face of the opening portion is integrally connected to the upper end face of the straight pipe portion. A filter assembly is disposed in the straight pipe portion, and an oil leakage plate is disposed inside the straight pipe portion, the oil leakage plate being disposed below the filter assembly. This invention discloses a method for separating solids from liquids in a mixture during the circulation of lubricating oil. When solid impurities such as iron filings follow the lubricating oil into the oil-gas separator, the solid impurities are separated and stored through multi-layer filtration, thereby preventing the compressor from jamming.

[0004] It can be seen from the above patent that although the filtering device for the oil-gas separator can achieve separation and storage, since the solid-liquid separation plate is a horizontal ring structure, solid impurities such as iron filings are easily accumulated and blocked during separation and storage on the solid-liquid separation plate, affecting the separation process; therefore, it needs to be redesigned for improvement. Summary of the Invention

[0005] The purpose of the utility model is to solve the deficiencies of the prior art and to provide a multi-stage filtering mechanism for an oil-gas separator.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0007] A multi-stage filtering mechanism for an oil-gas separator comprises a funnel, wherein a first filter cartridge, a first filter screen, and a second filter screen are sequentially arranged inside and at the bottom of the funnel from top to bottom, wherein the bottom plane of the first filter cartridge, the planes of the first filter screen, and the planes of the second filter screen are inclined at angles of 10° to 30°, -10° to 30°, and 10° to 30° to the horizontal direction, respectively; and a second filter cartridge is arranged directly below the bottom of the funnel.

[0008] Preferably, a rotating shaft is provided at the bottom center of the second filter cartridge, and the rotating shaft extends upward from the bottom center of the second filter cartridge to the middle of the inner cavity of the second filter cartridge, and the rotating shaft is rotatably connected to the bottom center of the second filter cartridge.

[0009] Preferably, a plurality of layers of stirring blades are provided on the outer wall of the rotating shaft from bottom to top, and the stirring blades of each layer are evenly and symmetrically distributed at adjacent equal angles in a plane.

[0010] Preferably, a motor is provided on the outer wall of the second filter cylinder, a drive shaft of the motor is connected to the rotating shaft via a belt, and an inclined baffle is provided on the inner wall of the second filter cylinder, the baffle is located above the belt and covers the belt.

[0011] Preferably, a drain pipe is provided at the junction of the funnel and the lower end of the first filter cartridge, the drain pipe sequentially passes through the inner wall and outer wall of the lower end of the first filter cartridge and the inner wall and outer wall of the funnel, and a switch valve is provided on the drain pipe.

[0012] Preferably, filter holes are evenly distributed on the bottom and sidewall circumferences of the first filter cartridge and the second filter cartridge.

[0013] The beneficial effects of the utility model are:

[0014] A first filter cartridge, a first filter screen, a second filter screen and a second filter cartridge are respectively provided to perform multi-stage filtration on a mixture containing solid impurities; a stirring blade is provided in the second filter cartridge to stir the mixture, and the solid impurities are dispersed at the bottom edge and side wall of the second filter cartridge under the action of centrifugal force, without causing accumulation and blockage of solid impurities in the middle of the second filter cartridge, thereby achieving solid-liquid separation and storing the solid impurities in different areas in a graded manner; a sewage pipe is provided to discharge the solid impurities in the storage area in a timely manner, facilitating multi-stage filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons skilled in the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0017] Figure 1 This is a structural diagram of a multi-stage filtering mechanism for an oil-gas separator proposed in the present invention;

[0018] Figure 1 Shown in: 1. Funnel, 2. First filter screen, 3. First filter cartridge, 4. Second filter cartridge, 5. Second filter screen, 6. Rotating shaft, 7. Stirring blade, 8. Motor, 9. Baffle, 10. Drain pipe, 101. First storage area, 102. Second storage area, 103. Third storage area, 104. Fourth storage area, 105. Fifth storage area. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0022] It should be noted that similar reference numerals and letters tend to denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] In the description of the present utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is typically placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These terms are intended only to facilitate the description of the present utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present utility model. In addition, the terms "first," "second," etc., etc., are used only to distinguish descriptions and should not be understood as indicating or implying relative importance.

[0024] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0025] Reference Figure 1 The utility model discloses a multi-stage filtering mechanism for an oil-gas separator, comprising a funnel 1, a first filter screen 2, a first filter cartridge 3, a second filter cartridge 4, a second filter screen 5, a rotating shaft 6, a stirring blade 7, a motor 8, a baffle 9, and a drain pipe 10.

[0026] The funnel 1 is a cylindrical hollow funnel 1, and the first filter cartridge 3, the first filter screen 2 and the second filter screen 5 are arranged in sequence inside and at the bottom of the funnel 1 from top to bottom. The bottom plane of the first filter cartridge 3, the planes of the first filter screen 2 and the second filter screen 5 are inclined at angles of 10°~30°, -10°~30° and 10°~30° to the horizontal direction respectively. The purpose of the inclined setting is to form a storage area without affecting the passage of lubricating oil from the screen area of ​​the non-storage area; the outer wall of the lower end of the first filter cartridge 3 and the inner wall of the funnel 1 form a first storage area 101, the inner wall of the lower end of the first filter cartridge 3 and the bottom inner wall form a second storage area 102, and the lower end of the first filter screen 2 and the inner wall of the funnel 1 form a third storage area 103; the second filter cartridge 4 is arranged directly below the bottom of the funnel 1, the bottom end of the second filter screen 5 and the inner wall of the second filter cartridge 4 form a fourth storage area 104, and the bottom edge and side wall of the second filter cartridge 4 form a fifth storage area 105.

[0027] In an optional embodiment, a rotating shaft 6 is provided at the bottom center of the second filter barrel 4, and a plurality of layers of stirring blades 7 are provided on the outer wall of the rotating shaft 6 from bottom to top, and each layer of stirring blades is uniformly and symmetrically distributed at adjacent equal angles in a plane; the rotation of the rotating shaft 6 drives the stirring blades 7 to stir the mixture in the second filter barrel 4, generating centrifugal force, so that the solid impurities are stored at the bottom edge and side wall of the second filter barrel 4 to form a fifth storage area 105.

[0028] In an optional embodiment, a motor 8 is provided on the outer wall of the second filter cartridge 4, and the drive shaft of the motor 8 is connected through a belt and drives the upwardly extending rotating shaft 6. An inclined baffle 9 is provided on the inner wall of the second filter cartridge 4. The baffle 9 is located above the belt and covers the belt to protect the belt to prevent the lubricating oil filtered from the second filter screen 5 from dripping onto the belt. The purpose of the inclination of the baffle 9 is to allow the lubricating oil dripping on the baffle 9 to slide along the inclined baffle 9 into the second filter cartridge 4.

[0029] In an optional embodiment, a drain pipe 10 is provided at the junction of the funnel 1 and the lower end of the first filter cartridge 3. The drain pipe 10 passes through the inner wall and outer wall of the lower end of the first filter cartridge 3, the inner wall of the funnel 1 and the outer wall in sequence, so as to facilitate the discharge of solid impurities in the first storage area 101 and the second storage area 102 where the most solid impurities are produced, so as to continue to store solid impurities; a switch valve is provided on the drain pipe 10, so that when there are more solid impurities in the first storage area 101 and the second storage area 102, the solid impurities can be discharged in time.

[0030] In an optional embodiment, filter holes are evenly distributed on the bottom and sidewall circumferences of the first filter cartridge 3 and the second filter cartridge 4, and both can achieve filtering functions.

[0031] Of course, the embodiments of the present specific embodiment are the preferred embodiments of the present application, not limited by the protection scope of the present application, so: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A multi-stage filtering mechanism for an oil-gas separator, comprising a funnel (1), characterized in that: A first filter cartridge (3), a first filter screen (2), and a second filter screen (5) are sequentially arranged inside and at the bottom of the funnel (1) from top to bottom, and the bottom plane of the first filter cartridge (3), the planes of the first filter screen (2), and the planes of the second filter screen (5) are inclined at angles of 10° to 30°, -10° to 30°, and 10° to 30° to the horizontal direction, respectively; and a second filter cartridge (4) is arranged directly below the bottom of the funnel (1).

2. The multi-stage filtering mechanism for an oil-gas separator according to claim 1, characterized in that: A rotating shaft (6) is provided at the bottom center of the second filter cartridge (4), and the rotating shaft (6) extends upward from the bottom center of the second filter cartridge (4) to the middle of the inner cavity of the second filter cartridge (4), and the rotating shaft (6) is rotatably connected to the bottom center of the second filter cartridge (4).

3. The multi-stage filtering mechanism for an oil-gas separator according to claim 2, characterized in that: Several layers of stirring blades (7) are arranged on the outer wall of the rotating shaft (6) from bottom to top, and the stirring blades of each layer are arranged in adjacent equal angles and evenly and symmetrically distributed in a plane.

4. The multi-stage filtering mechanism for an oil-gas separator according to claim 2, characterized in that: A motor (8) is provided on the outer wall of the second filter cylinder (4), and a transmission shaft of the motor (8) is connected to the rotating shaft (6) via a belt. An inclined baffle (9) is provided on the inner wall of the second filter cylinder (4), and the baffle (9) is located above the belt and covers the belt.

5. The multi-stage filtering mechanism for an oil-gas separator according to claim 1, characterized in that: A sewage discharge pipe (10) is provided at the junction of the lower end of the funnel (1) and the first filter cartridge (3), and the sewage discharge pipe (10) sequentially passes through the inner wall and outer wall of the lower end of the first filter cartridge (3) and the inner wall and outer wall of the funnel (1), and a switch valve is provided on the sewage discharge pipe (10).

6. The multi-stage filtering mechanism for an oil-gas separator according to claim 1, characterized in that: Filter holes are evenly distributed on the bottom and side wall circumferences of the first filter cartridge (3) and the second filter cartridge (4).

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