Oil-gas separation device

Abstract

The utility model provides an oil-gas separation device, which belongs to the field of oil-gas separation, and comprises an inner shell, an outer shell, an oil-gas inlet pipe, a gas outlet pipe, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe, a gas outlet pipe, a gas outlet pipe and a gas outlet pipe, wherein the inner shell is arranged on the inner side of the outer shell, is of a cylindrical structure and coincides with the axis of the outer shell; the plurality of gas guide plates are arranged between the outer shell and the inner shell in a staggered manner; the gas-guide tube is arranged on the inner side of the inner shell, the top side of the gas-guide tube is suspended, the bottom side of the gas-guide tube is fixedly connected with the inner shell through a partition plate, through holes are formed in the partition plate, and the diameter of the gas-guide tube decreases gradually from two ends to the middle; and the wire mesh demister is arranged on the top side of the gas guide pipe, is fixedly arranged between the inner shells and is arranged in a convex arc shape. According to the oil-gas separation device, fine oil drops in an oil-gas mixture are removed through repeated filtration of the labyrinth type gas guide plate, the oil filtering layer and the spiral gas inlet pipe, the content of the fine oil drops in oil gas reaching the wire mesh demister is relatively lower, and the fine oil drops are prevented from flowing out of the oil-gas separation device along with flowing gas.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-gas separation, in particular to an oil-gas separation device. Background Art

[0002] Usually, high-power diesel engines are equipped with oil-gas separators, which are important parts of the engine. Since "blow-by" will occur during the operation of the engine, the combustible gas and combustion exhaust gas in the combustion chamber will enter the crankcase through the gap between the piston and the cylinder when the piston moves. These exhaust gases will dilute and pollute the engine oil, interfere with the lubrication system, corrode parts, and directly discharge them will pollute the environment and cause the engine oil to be consumed too quickly. Therefore, an oil-gas separator is needed to relieve the pressure of the valve chamber and crankcase, and recover the engine oil in the exhaust gas.

[0003] Patent No. 201520365836.1 discloses an engine oil-gas separation device, including a shell with a cavity structure, the shell is provided with a labyrinth separation chamber and a shrapnel separation chamber, the shrapnel separation chamber is connected to a longitudinal baffle of a vent, the vent is connected to an elastic baffle, an upper baffle is provided above the vent, the inlet of the labyrinth separation chamber is connected to an air inlet, the outlet is connected to the inlet of the shrapnel separation chamber, and the outlet of the shrapnel separation chamber is respectively connected to an oil return port and an air outlet.

[0004] In the above technology, when the mixed gas hits the upper baffle, some oil particles will accumulate into oil droplets and be collected. However, some oil particles will form tiny oil mist after impact. The oil mist will flow out of the oil-gas separation device with the flowing gas, thereby reducing the separation efficiency of the engine oil-gas separator. Utility Model Content

[0005] In view of the above problems, the utility model provides an oil-gas separation device.

[0006] An oil-gas separation device comprises an outer shell, and an oil-gas inlet pipe and an outlet pipe are arranged on the top side of the outer shell, and an oil outlet pipe is arranged on the bottom side. The oil-gas separation device also comprises: an inner shell, which is arranged on the inner side of the outer shell and has a cylindrical structure and coincides with the central axis of the outer shell, the oil-gas inlet pipe is arranged on the outer side of the inner shell, and the outlet pipe is arranged on the inner side of the inner shell; a plurality of air guide plates are arranged between the outer shell and the inner shell in a staggered manner; an air guide pipe is arranged on the inner side of the inner shell, with the top side suspended in the air and the bottom side fixedly connected to the inner shell through a partition, and a through hole is arranged on the partition, wherein the diameter of the air guide pipe decreases from both ends to the middle; a wire mesh demister is arranged on the top side of the air guide pipe and is fixedly arranged between the inner shells in an upward convex arc shape.

[0007] In a preferred embodiment, the oil-gas separation device further comprises: an oil filter layer, which is arranged at the bottom intersection of the air duct.

[0008] In a preferred embodiment, the oil-gas separation device further comprises: a spiral air inlet pipe, which is arranged in the middle of the air guide pipe.

[0009] In a preferred embodiment, the diameters of the two ends of the airway tube are 1 / 4-1 / 3 of the diameter of the middle part of the airway tube; and the length of the middle part of the airway tube is 1.5-3 times the length of any side of the airway tube.

[0010] In a preferred embodiment, the air guide plate is tilted at an angle of 30-60°, and an oil hole is provided on the air guide plate connected to the outside, and the oil hole is provided on the bottom side of the air guide plate.

[0011] In a preferred embodiment, the bottom side of the shell is in a terrace shape, a sewage pipe is installed on the bottom surface of the shell, and the oil outlet pipe is installed on the top side of the sewage pipe.

[0012] In a preferred embodiment, a filter plate is installed at the oil outlet pipe, and the filter plate is installed on the inner side of the shell.

[0013] The oil-gas separation device of the present application separates the oil-gas mixture through a labyrinth-type air guide plate, and then filters it again through the filter oil layer and the spiral intake pipe for multiple times, thereby removing the fine oil droplets in the oil-gas mixture. When it reaches the wire mesh demister, the content of fine oil droplets in the oil and gas reaching the wire mesh demister is relatively lower, and the fine oil droplets can be completely removed, preventing the fine oil droplets from flowing out of the oil-gas separation device with the flowing gas, which in turn reduces the separation efficiency of the engine oil-gas separator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other characteristics, features and advantages of the present invention will become clear by reading the following description of the exemplary embodiments with reference to the accompanying drawings. The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 Structural diagram of the oil-gas separation device of the utility model;

[0016] Figure 2 A cross-sectional view of the oil-gas separation device of the utility model;

[0017] Figure 3 A cross-sectional view of Example 3 of the oil-gas separation device of the utility model;

[0018] Figure 4 A magnified view of the position A of the oil-gas separation device of the utility model;

[0019] In the figure: 10, outer shell; 11, oil and gas inlet pipe; 12, air outlet pipe; 13, oil outlet pipe; 20, inner shell; 21, air guide plate; 30, air guide pipe; 31, partition; 32, through hole; 40, wire mesh demister; 33, oil filter layer; 34, spiral air inlet pipe; 22, oil through hole; 14, sewage pipe; 131, filter plate. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0021] The oil-gas separation device is described in detail below in conjunction with the accompanying drawings and embodiments. Example

[0022] An oil-gas separation device comprises an outer shell 10, and an oil-gas inlet pipe 11 and an outlet pipe 12 are arranged on the top side of the outer shell 10, and an oil outlet pipe 13 is arranged on the bottom side. The oil-gas separation device also comprises: an inner shell 20, which is arranged on the inner side of the outer shell 10, has a cylindrical structure, and coincides with the central axis of the outer shell 10, the oil-gas inlet pipe 11 is arranged on the outer side of the inner shell 20, and the outlet pipe 12 is arranged on the inner side of the inner shell 20; a plurality of air guide plates 21 are arranged between the outer shell 10 and the inner shell 20, and are arranged in a staggered manner; an air guide pipe 30 is arranged on the inner side of the inner shell 20, the top side is suspended, and the bottom side is fixedly connected to the inner shell 20 through a partition 31, and a through hole 32 is arranged on the partition 31, wherein the diameter of the air guide pipe 30 decreases from both ends to the middle; a wire mesh demister 40 is arranged on the top side of the air guide pipe 30, and is fixedly arranged between the inner shells 20, and is arranged in an upward convex arc shape.

[0023] During operation, the oil-gas mixture enters from the oil-gas inlet pipe 11, passes through the oil return channel formed by the air guide plate 21, the outer shell 10 and the inner shell 20, thereby realizing oil-gas separation of the oil-gas mixture through the labyrinth air guide plate 21, thereby improving the efficiency of oil-gas separation. Then, the remaining mixed oil and gas pass through the air guide pipe 30, and the wire mesh demister 40 filters the fine oil droplets in the oil and gas. The filtered fine oil droplets will continue to gather into large-particle oil droplets, and the condensed oil droplets will fall from the through hole 32 to the bottom side of the outer shell 10 along the edge of the wire mesh demister 40 due to gravity, and be discharged from the oil outlet pipe together with the liquid oil in the oil return channel.

[0024] In order to filter out impurities in the liquid oil, a filter plate 131 is installed at the oil outlet pipe 13 , and the filter plate 131 is installed on the inner side of the housing 10 .

[0025] The bottom side of the housing 10 is in a table shape, a drain pipe 14 is installed on the bottom surface of the housing 10, and the oil outlet pipe 13 is installed on the top side of the drain pipe 14. By providing the drain pipe 14, it is convenient to remove impurities accumulated on the bottom side of the housing.

[0026] Among them, the air guide plates 21 are all arranged in an annular structure. Example

[0027] Embodiment 2 is an improvement on Embodiment 1, and the improvement includes: the oil-gas separation device further includes: an oil filter layer 33 , which is arranged at the bottom intersection of the air guide pipe 30 .

[0028] By setting the oil filter layer 33, the oil-gas mixture is separated for the second time, and the content of fine oil droplets in the oil-gas mixture is reduced, thereby further improving the oil-gas separation efficiency, reducing the content of fine oil droplets passing through the wire mesh demister 40, and further improving the oil-gas absorption capacity of the wire mesh demister 40. Example

[0029] Embodiment 3 is an improvement on Embodiment 1, and the improvement includes: the oil-gas separation device further includes: a spiral air intake pipe 34 disposed in the middle of the air guide pipe 30 .

[0030] Among them, by setting a spiral air inlet pipe 34, a rotating airflow is formed in the air guide pipe 30, thereby generating a centrifugal force, thereby further reducing the content of fine oil droplets in the oil-gas mixture, improving the oil-gas separation efficiency, reducing the content of fine oil droplets passing through the wire mesh demister 40, and thus improving the oil-gas absorption capacity of the wire mesh demister 40. Example

[0031] Embodiment 4 is an improvement on Embodiment 3, and the improvements include: the diameters of both ends of the air guide tube 30 are 1 / 4-1 / 3 of the diameter of the middle portion of the air guide tube 30 ; and the length of the middle portion of the air guide tube 30 is 1.5-3 times the length of any side of the air guide tube 30 .

[0032] By designing the air duct 30 to have a structure in which the diameters on both sides gradually decrease toward the middle, the spiral flow velocity of the oil-gas mixture in the air duct 30 is increased, the fine oil droplets generated by the centrifugal force per unit time increase, the oil-gas separation efficiency is improved, and the oil content in the fine oil droplets passing through the wire mesh demister 40 is reduced, thereby improving the oil-gas absorption capacity of the wire mesh demister 40. Example

[0033] Embodiment 5 is an improvement on Embodiment 1, and the improvement includes: the air guide plate 21 is tilted at an angle of 30-60°, and an oil hole 22 is provided on the air guide plate 21 connected to the outside, and the oil hole 22 is provided on the bottom side of the air guide plate 21 .

[0034] Among them, since the air guide plate 21 is set at an angle, after the oil-gas mixture impacts the surface of the air guide plate 21, oil droplets are quickly formed on the plate surface, and are more likely to fall down due to gravity and will not be retained on the surface of the air guide plate 21, which is beneficial to improving the oil-gas separation efficiency.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "includes..." do not exclude the existence of other identical elements in the article or device including the elements.

[0036] The above embodiments are only used to illustrate the technical solution of the utility model but not to limit it. The utility model is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, and all should be included in the scope of the claims of the utility model.

Claims

1. An oil-gas separation device, comprising a housing (10), wherein an oil-gas inlet pipe (11) and an air outlet pipe (12) are arranged on the top side of the housing (10), and an oil outlet pipe (13) is arranged on the bottom side, characterized in that: The oil-gas separation device further comprises: The inner shell (20) is arranged inside the outer shell (10), has a cylindrical structure, and coincides with the central axis of the outer shell (10); the oil and gas inlet pipe (11) is arranged outside the inner shell (20), and the gas outlet pipe (12) is arranged inside the inner shell (20); a plurality of air guide plates (21) arranged between the outer shell (10) and the inner shell (20) in a staggered arrangement; an air guide tube (30) arranged inside the inner shell (20), with the top side suspended in the air and the bottom side fixedly connected to the inner shell (20) via a partition (31), wherein a through hole (32) is provided on the partition (31), wherein the diameter of the air guide tube (30) decreases from both ends to the middle; The wire mesh demister (40) is arranged on the top side of the air guide pipe (30) and is fixedly arranged between the inner shells (20) in an upwardly convex arc shape.

2. The oil-gas separation device according to claim 1, characterized in that: The oil-gas separation device also includes: The oil filter layer (33) is arranged at the bottom intersection of the air guide pipe (30).

3. The oil-gas separation device according to claim 1, characterized in that: The oil-gas separation device further comprises: The spiral air inlet pipe (34) is arranged in the middle of the air guide pipe (30).

4. The oil-gas separation device according to claim 1, characterized in that: The diameters of the two ends of the air guide tube (30) are 1 / 4 to 1 / 3 of the diameter of the middle portion of the air guide tube (30); and the length of the middle portion of the air guide tube (30) is 1.5 to 3 times the length of any side of the air guide tube (30).

5. The oil-gas separation device according to claim 1, characterized in that: The air guide plate (21) is arranged in an inclined manner with an inclination angle of 30-60 degrees, and an oil through hole (22) is provided on the air guide plate (21) connected to the outside, wherein the oil through hole (22) is provided on the bottom side of the air guide plate (21).

6. The oil-gas separation device according to claim 1, characterized in that: The bottom side of the shell (10) is in a table shape, a sewage pipe (14) is installed on the bottom surface of the shell (10), and the oil outlet pipe (13) is installed on the top side of the sewage pipe (14).

7. The oil-gas separation device according to claim 1, characterized in that: A filter plate (131) is installed at the oil outlet pipe (13), and the filter plate (131) is installed inside the housing (10).

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