Simple multistage separation oil-gas separator

Abstract

The utility model discloses a simple multi-stage separation oil-gas separator which comprises an outer cylinder, a middle cylinder, an inner cylinder, a spiral blade, an oil-gas inlet, an oil outlet, a gas outlet, a gas hole, an oil leakage hole and a filter medium. The inner wall of the outer cylinder, the inner walls and the outer walls of the middle cylinder and the inner cylinder and the outer surfaces of the spiral blades are covered with the oleophobic coatings respectively, so that oil drops are prevented from being attached and even adhered to the inner wall of the outer cylinder, the inner walls and the outer walls of the middle cylinder and the inner cylinder and the spiral blades. The bottoms of the outer cylinder, the middle cylinder and the inner cylinder are of inverted triangular pyramid structures, so that oil drops can conveniently flow along an inclined plane to prevent adhesion of the oil drops; the problem that oil drops are easily adhered to the inner wall surface and the partition plate of the separator in a sheet manner is solved. The cyclone separator sequentially performs cyclone separation and multi-stage separation of the middle cylinder and the inner cylinder on an oil-gas mixture, and is simple in structure and easy to operate.

Description

Technical Field

[0001] This utility model relates to the field of oil-gas separators, specifically a simple multi-stage oil-gas separator. Background Technology

[0002] An oil-gas separator is a device that effectively separates oil and gas. Current technologies for oil-gas separators mainly include: active centrifugal oil-gas separators, volumetric oil-gas separators, cyclone oil-gas separators, baffle oil-gas separators, and filter oil-gas separators.

[0003] For example, Chinese invention patent CN109236658B, published on February 9, 2024, discloses an oil-gas separator, including: a separator body, an isolation plate, and an oil storage tank. This invention provides an oil-gas separator that, through the arrangement of an outer and inner cylinder, extends the path length of oil-laden airflow within the separator, combining cyclone separation and collision separation modes to achieve better separation results in a smaller volume. The isolation plate separates the upper separator body from the lower oil storage tank, ensuring air flows only within the upper separator body and preventing secondary oil droplet re-entrainment by air flowing in the lower oil storage tank. The oil distribution tank prevents vacuum pump oil from naturally flowing into the vacuum pump under gravity, reducing the installation height requirements for the oil-gas separator, allowing for more flexible placement, effectively reducing vehicle design and modification difficulties, and improving production efficiency.

[0004] As can be seen from the above patents, during the use of this oil-gas separator, oil droplets are prone to sticking together in sheets due to their high viscosity, especially when the partition plates are set in a horizontal direction; therefore, the structure of the oil-gas separator needs to be redesigned to improve it. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a simple, multi-stage oil-gas separator.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a simple multi-stage oil-gas separator, comprising an outer cylinder, a middle cylinder, and an inner cylinder arranged from the outside in, wherein the outer cylinder, middle cylinder, and inner cylinder are arranged along a common central axis, and the bottom of the outer cylinder, middle cylinder, and inner cylinder is an inverted triangular cone structure, wherein the inner wall of the outer cylinder, the inner wall of the middle cylinder, and the outer wall of the inner cylinder are respectively covered with an oil-repellent coating.

[0007] Preferably, a spiral blade is provided on the outer wall of the middle cylinder. The spiral blade spirals down along the outer wall of the middle cylinder from top to bottom until the bottom edge of the middle cylinder. The outer end of the spiral blade is in close contact with the inner wall of the outer cylinder. The angle between the spiral blade and the horizontal direction is 30~60º. The outer surface of the spiral blade is covered with an oil-repellent coating.

[0008] Preferably, a plurality of oil and gas inlets are provided at the top of the outer wall of the outer cylinder, and the inlet direction of the oil and gas inlets is parallel to the tangent direction of the circumference of the outer cylinder and is externally tangent to the outer wall of the outer cylinder.

[0009] Preferably, an oil outlet and a gas outlet are respectively provided at the bottom and top center of the inverted triangular cone of the outer cylinder.

[0010] Preferably, a plurality of air holes are provided on the bottom of the inverted triangular cone of the middle cylinder and the inner cylinder. The air holes are distributed in concentric circles on the cone surface of the inverted triangular cone with the bottom center as the center, and are evenly distributed in adjacent symmetrical angles on the same circumference.

[0011] Preferably, filter media are respectively provided on the inner wall of the bottom of the inverted triangular cone of the middle cylinder and the inner cylinder.

[0012] Preferably, an oil leakage hole is provided at the tip of the inverted triangular cone at the center of the bottom of the middle cylinder and the inner cylinder, and the oil leakage hole is located directly above the oil outlet.

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

[0014] An oleophobic coating is applied to the inner wall of the outer cylinder, the inner and outer walls of the middle and inner cylinders, and the outer surface of the spiral blades to prevent oil droplets from adhering to or even sticking together on these surfaces. The bottoms of the outer, middle, and inner cylinders are designed with an inverted triangular cone shape to facilitate the flow of oil droplets along the inclined surface and prevent them from sticking together. This solves the problem of oil droplets easily sticking together and adhering to the inner wall of the separator and the partition plate. This invention performs multi-stage separation of oil-gas mixtures through cyclone separation, middle cylinder, and inner cylinder, with a simple structure and easy operation. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 1 As shown: 1. Outer cylinder; 2. Middle cylinder; 3. Inner cylinder; 4. Spiral blade; 5. Oil and gas inlet; 6. Oil outlet; 7. Gas outlet; 8. Gas hole; 9. Oil leakage hole; 10. Filter medium. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically 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 merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0022] It should be noted that similar labels and letters are likely to represent similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Reference Figure 1 The present invention discloses a simple multi-stage oil-gas separator, comprising an outer cylinder 1, a middle cylinder 2, an inner cylinder 3, a spiral blade 4, an oil-gas inlet 5, an oil outlet 6, a gas outlet 7, a gas hole 8, an oil leakage hole 9, and a filter medium 10.

[0026] Centered on the central axis of the oil-gas separator, an outer cylinder 1, a middle cylinder 2, and an inner cylinder 3 are arranged sequentially from the outside to the inside, all sharing the same central axis. The bottoms of the outer cylinder 1, middle cylinder 2, and inner cylinder 3 are designed with an inverted triangular cone shape to facilitate the flow of oil droplets along the inclined surface due to their own gravity, preventing oil droplets from adhering to or even sticking together on the bottom of the outer cylinder 1, middle cylinder 2, and inner cylinder 3. A spiral blade 4 is installed on the outer wall of the middle cylinder 2, forming a continuous whole from the top to the bottom edge of the middle cylinder 2. The angle between the spiral blade 4 and the horizontal direction is 30~60º. The outer end of the spiral blade 4 is tightly fitted against the inner wall of the outer cylinder 1 to form a closed, downward spiral airflow channel between the outer cylinder 1 and the middle cylinder 2. The inner walls of the outer cylinder 1, the inner and outer walls of the middle and inner cylinders 2 and 3, and the outer surface of the spiral blade 4 are all covered with an oleophobic coating to prevent oil droplets from remaining, adhering to, or even sticking together on the inner walls of the outer cylinder 1, the middle and inner cylinders 2 and 3, and the outer surface of the spiral blade 4, respectively.

[0027] In an optional embodiment, the outer cylinder 1 has an oil outlet 6 and a gas outlet 7 at the center of its bottom and top of the inverted triangular cone, respectively, for discharging the separated oil and gas. The middle cylinder 2 and inner cylinder 3 have several symmetrically and evenly distributed air holes 8 at their bottoms, primarily for the gas from the outer cylinder 1 to enter the middle cylinder 2 and the gas from the middle cylinder 2 to enter the inner cylinder 3. Filter media 10 are respectively installed on the inner walls of the bottom of the inverted triangular cones of the middle cylinder 2 and inner cylinder 3. The filter media 10 can be a multi-layer fiber filter or filter cotton, and its function is to absorb oil and prevent oil from entering the middle cylinder 2 and inner cylinder 3, respectively. Oil leakage holes 9 are respectively provided at the tips of the cones at the center of the bottom of the inverted triangular cones of the middle cylinder 2 and inner cylinder 3, for dripping the oil absorbed by the filter media 10 into the oil outlet 6 directly below the oil leakage hole 9.

[0028] In an optional embodiment, several oil and gas inlets 5 are provided at the top of the outer wall of the outer cylinder 1. The inlet direction of the oil and gas inlets 5 is parallel to the tangent direction of the circumference of the outer cylinder 1 and is externally tangent to the outer wall of the outer cylinder 1. This allows the oil and gas mixture to enter the outer cylinder 1 from the oil and gas inlets 5 and spiral downward along the circumference of the outer wall of the outer cylinder 1 in a closed spiral downward air duct, generating centrifugal force. This causes the heavier oil droplets to be thrown onto the inner wall of the outer cylinder 1. Due to the presence of the oleophobic coating, the oil droplets flow sequentially along the inner wall of the outer cylinder 1 to the outer end of the spiral blade 4, then along the spiral blade 4 to the oil groove where the spiral blade 4 intersects with the middle cylinder 2, and then along the spiral trajectory of the spiral blade 4 to the bottom edge of the middle cylinder 2. They continue to flow along the outer wall of the bottom of the middle cylinder 2 to the oil leakage hole 9 at the center of the bottom of the middle cylinder 2, and finally drip into the oil outlet 6.

[0029] Of course, the embodiments described in this specific implementation are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A simple multi-stage oil-gas separator, comprising an outer cylinder (1), a middle cylinder (2), and an inner cylinder (3) arranged from the outside in, wherein the outer cylinder (1), the middle cylinder (2), and the inner cylinder (3) are arranged along a common central axis, characterized in that: The bottom of the outer cylinder (1), middle cylinder (2) and inner cylinder (3) is an inverted triangular cone structure. The inner wall of the outer cylinder (1), the inner wall of the middle cylinder (2) and the outer wall of the inner cylinder (3) are respectively covered with an oil-repellent coating.

2. The simple multi-stage oil-gas separator according to claim 1, characterized in that: The outer wall of the middle cylinder (2) is provided with a spiral blade (4). The spiral blade (4) spirals down along the outer wall of the middle cylinder (2) from top to bottom until the bottom edge of the middle cylinder (2). The outer end of the spiral blade (4) is tightly attached to the inner wall of the outer cylinder (1). The angle between the spiral blade (4) and the horizontal direction is 30~60º. The outer surface of the spiral blade (4) is covered with an oil-repellent coating.

3. The simple multi-stage oil-gas separator according to claim 1, characterized in that: Several oil and gas inlets (5) are provided at the top of the outer wall of the outer cylinder (1). The inlet direction of the oil and gas inlets (5) is parallel to the tangent direction of the circumference of the outer cylinder (1) and is externally tangent to the outer wall of the outer cylinder (1).

4. The simple multi-stage oil-gas separator according to claim 1, characterized in that: The outer cylinder (1) has an oil outlet (6) and a gas outlet (7) at the bottom and top center of the inverted triangular cone, respectively.

5. A simple multi-stage oil-gas separator according to claim 1, characterized in that: A number of air holes (8) are provided on the bottom of the inverted triangular cone of the middle cylinder (2) and the inner cylinder (3). The air holes (8) are distributed in concentric circles on the cone surface of the inverted triangular cone with the bottom center as the center, and are evenly distributed in adjacent symmetrical angles on the same circumference.

6. The simple multi-stage oil-gas separator according to claim 1, characterized in that: Filter media (10) are respectively provided on the inner wall of the bottom of the inverted triangular cone of the middle cylinder (2) and the inner cylinder (3).

7. A simple multi-stage oil-gas separator according to claim 4, characterized in that: Oil leakage holes (9) are respectively provided at the cone tips of the bottom center of the inverted triangular cones of the middle cylinder (2) and the inner cylinder (3), and the oil leakage holes (9) are located directly above the oil outlet (6).

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