Oil-gas separator for helium compressor

Abstract

The oil-gas separator comprises a shell, a gas outlet pipe, a gas inlet pipe, an oil outlet pipe and a filter element, wherein the gas outlet pipe, the gas inlet pipe, the oil outlet pipe and the filter element are vertically fixed at the top of the shell; the air outlet pipe is divided into a vertical section and a horizontal section, the vertical section is fixed on the shell, the horizontal section positioned in the shell is positioned above the filter element, and an air inlet of the horizontal section faces the direction of a central shaft of the separator; the vertical length of the air outlet pipe in the shell is larger than the distance between the oil outlet pipe and the bottom of the shell. According to the device, more lubricating oil can be prevented from entering the adsorber in the transportation and use process, and the purity of oil-gas separation is improved; residual lubricating oil at the bottom is prevented from entering the adsorber, and the service life of the adsorbent is prolonged; the situation that lubricating oil enters the adsorber and cannot be recycled is avoided, the use efficiency of the lubricating oil is improved, and cost and pollution to the environment are reduced; the device is simple in structure, good in matching with an existing device and easy to popularize.

Description

Technical Field

[0001] The utility model relates to a helium compression device, in particular to an oil-gas separator for a helium compressor. Background Art

[0002] The helium compressor compresses helium into a high-pressure state through mechanical compression, providing gas that meets the needs of superconductor refrigeration, gas analysis, etc. The oil-gas separator is used to separate the helium and lubricating oil in the compressor. After separation, the helium enters the adsorber through the top outlet pipe for further filtration, while the lubricating oil at the bottom of the separator returns to the compression bag through the oil outlet pipe. The adsorbent built into the adsorber further adsorbs and purifies the residual oil mist particles, but the adsorption capacity of the adsorbent is limited, so the service life is limited and needs to be replaced regularly. At the same time, due to a certain gap between the oil outlet pipe and the bottom of the shell, some lubricating oil will remain. If it rolls over or tipped over during transportation or use, the lubricating oil at the bottom will enter the adsorber through the outlet pipe, which will increase the use of the adsorbent and the lubricating oil cannot be recycled into the compression bag after being adsorbed, resulting in a waste of lubricating oil. Utility Model Content

[0003] Purpose of the utility model: The purpose of the utility model is to improve the purity of oil-gas separation, increase the service life of the adsorbent, reduce the waste of lubricating oil, and provide an oil-gas separator for a helium compressor.

[0004] Technical solution: The oil-gas separator for a helium compressor described in the utility model comprises a shell and an air outlet pipe, an air inlet pipe, an oil outlet pipe and a filter element vertically fixed to the top of the shell; the air outlet pipe is divided into a vertical section and a horizontal section, the vertical section is fixed to the shell, the horizontal section located inside the shell is located above the filter element, and the air inlet of the horizontal section faces the central axis direction of the separator; the vertical length of the air outlet pipe located inside the shell is greater than the distance between the oil outlet pipe and the bottom of the shell.

[0005] Furthermore, the diameter of the vertical section of the gas outlet pipe is larger than the diameter of the horizontal section, so that the collected gas can be discharged in time.

[0006] Furthermore, a filter membrane is provided on the air inlet of the air outlet pipe to further prevent the lubricating oil from entering, thereby further preventing the incompletely filtered lubricating oil from entering the adsorption device along with the air flow, thereby reducing the service life of the adsorbent.

[0007] Furthermore, the corners inside the air outlet pipe are provided with chamfers to prevent the lubricating oil from being deposited, thereby preventing the lubricating oil from being deposited and making cleaning inconvenient, and preventing excessive lubricating oil from being deposited and clogging the air outlet pipe.

[0008] Furthermore, the oil inlet of the oil outlet pipe is an oblique section, which is conducive to the timely discharge of the lubricating oil deposited at the bottom through the oil outlet pipe when tipping occurs, and prevents the lubricating oil from entering the adsorption device through the air outlet pipe.

[0009] Furthermore, the filter element is wrapped with a shell for preventing the adsorbed lubricating oil from leaking, and the shell is a porous stainless steel structure to separate the lubricating oil and the compressed gas.

[0010] Beneficial effects: Compared with the prior art, the utility model has the following advantages: 1. It prevents more lubricating oil from entering the adsorber during transportation and use, thereby improving the purity of oil-gas separation; 2. It prevents the lubricating oil remaining at the bottom from entering the adsorber, thereby improving the service life of the adsorbent; 3. It prevents the lubricating oil from entering the adsorber and being unable to be recycled, thereby improving the efficiency of lubricating oil use and reducing costs and pollution to the environment; 4. It has a simple structure, good compatibility with existing devices, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structural section of the utility model. DETAILED DESCRIPTION

[0012] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0013] like Figure 1 The oil-gas separator for a helium compressor shown in the figure comprises a housing 1 and an air outlet pipe 2 vertically fixed to the top of the housing 1, an air inlet pipe 3 and an oil outlet pipe 4 wrapped by a filter element 5; the air outlet pipe 2 is divided into a vertical section and a horizontal section, the diameter of the vertical section is larger than the diameter of the horizontal section, a filter membrane is provided on the air inlet 7 of the air outlet pipe 2 to further prevent the entry of lubricating oil, and a chamfer is provided at the internal corner to prevent the deposition of lubricating oil, the vertical section of the air outlet pipe 2 is fixed to the upper end of the housing 1, the horizontal section is located above the filter element 5, and its air inlet 7 faces the central axis direction of the separator; the length of the vertical section of the air outlet pipe 2 is larger than the distance between the oil outlet pipe 4 and the bottom of the housing 1, and the oil inlet of the oil outlet pipe 4 is a beveled surface. The filter element 5 is wrapped with a shell 6 for preventing the leakage of the adsorbed lubricating oil, and the shell 6 is a porous stainless steel structure.

[0014] Helium containing lubricating oil particles enters the oil-gas separator from the air inlet pipe 3. After the oil mist particles are adsorbed by the filter element 5, the oil particles are adsorbed and gathered and then pass through the filter core shell 6 to settle at the bottom of the shell 1. They are returned to the compression bag through the oil outlet pipe 4. The filtered helium enters the adsorber through the air outlet pipe 2 for further purification and discharge. When the compressor is turned upside down, the length of the vertical section of the air outlet pipe 2 is greater than the distance between the oil outlet pipe 4 and the bottom of the shell 1. The lubricating oil level at the bottom of the shell 1 is lower than the height of the air outlet pipe 2. The lubricating oil returns to the compression bag through the oil outlet pipe 4 to prevent the lubricating oil from flowing into the air outlet pipe 2. When the compressor rolls over, the lubricating oil remaining at the bottom of the shell 1 will gather on one side along the rollover direction. At this time, the air inlet 7 of the air outlet pipe 2 is higher than the liquid level and higher than the surface of the outer shell 6 of the filter element 5, preventing the lubricating oil from flowing into the air outlet pipe 2. This device prevents the lubricating oil from entering the air outlet pipe 2 by mistake, increases the purity of oil-gas separation, prevents the lubricating oil from entering the adsorber, increases the service life of the adsorbent, reduces the accident rate, and ensures the overall safety and service life of the compressor.

Claims

1. An oil-gas separator for a helium compressor, comprising a housing (1) and an air outlet pipe (2), an air inlet pipe (3), an oil outlet pipe (4) and a filter element (5) vertically fixed to the top of the housing (1); characterized in that: The air outlet pipe (2) is divided into a vertical section and a horizontal section. The vertical section is fixed on the shell (1). The horizontal section located inside the shell (1) is located above the filter element (5). The air inlet (7) of the horizontal section faces the center axis of the separator. The vertical length of the air outlet pipe (2) located inside the shell (1) is greater than the distance between the oil outlet pipe (4) and the bottom of the shell (1).

2. The oil-gas separator for helium compressor according to claim 1, characterized in that: The diameter of the vertical section of the air outlet pipe (2) is greater than the diameter of the horizontal section.

3. The oil-gas separator for a helium compressor according to claim 1 or 2, characterized in that: The air inlet (7) of the air outlet pipe (2) is provided with a filter membrane to further prevent lubricating oil from entering.

4. The oil-gas separator for a helium compressor according to claim 1 or 2, characterized in that: The inner corner of the air outlet pipe (2) is provided with a chamfer to prevent the lubricating oil from depositing.

5. The oil-gas separator for a helium compressor according to claim 1, characterized in that: The oil inlet of the oil outlet pipe (4) is a beveled surface.

6. The oil-gas separator for a helium compressor according to claim 1, characterized in that: The filter element (5) is wrapped with a housing (6) for preventing the adsorbed lubricating oil from leaking.

7. The oil-gas separator for a helium compressor according to claim 6, characterized in that: The shell (6) is a porous stainless steel structure.

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