Exhaust oil mist separation recoverer of oil lubrication vacuum pump

Abstract

The embodiment of the utility model provides an oil lubrication vacuum pump exhaust oil mist separation recoverer which comprises a vertically-arranged barrel, an air inlet pipe communicated with the interior of the barrel is arranged at the bottom of the barrel, and an exhaust pipe communicated with the interior of the barrel is arranged at the top of the barrel; multiple layers of partition plates are arranged in the cylinder at intervals in the height direction of the cylinder, one end of each partition plate is fixedly connected with the inner side wall of the cylinder, the other end of each partition plate inclines downwards, a gap for oil-gas mixed gas to flow is reserved between the other end of each partition plate and the inner side wall of the cylinder, and the multiple layers of partition plates are arranged in a staggered mode and can separate and recover most lubricating oil in gas. And meanwhile, no filter element is arranged in the vacuum pump, so that the vacuum pump is free of maintenance all the time, and the equipment cost and the after-sale cost are effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to an exhaust oil mist separation and recovery device for an oil-lubricated vacuum pump. Background Art

[0002] The exhaust oil content is an important indicator of oil-lubricated vacuum pumps. The lower the exhaust oil content, the better the performance of the oil-lubricated vacuum pump. In the use of oil-lubricated vacuum pumps, lubricating oil plays a vital role. The lubricating oil will mix with air in the vacuum pump mainframe to form an oil-gas mixture, which will be discharged from the vacuum pump mainframe and separated from the lubricating oil and air in the oil-gas separator; the separated lubricating oil will enter the vacuum pump mainframe again after cooling and filtering, and the separated air will be discharged into the atmosphere.

[0003] However, the lubricating oil and air in the oil-gas mixture cannot be completely separated 100%, and the unseparated lubricating oil will be discharged into the atmosphere with the air. If too much lubricating oil is discharged into the atmosphere, on the one hand, the vacuum pump will lack oil during operation, and on the other hand, the oil-containing air will pollute the surrounding atmosphere. Therefore, it is very important to reduce the exhaust oil content of the oil-lubricated vacuum pump.

[0004] During the use of oil-lubricated vacuum pumps, as the running time increases, the oil quality changes, the oil-gas separation filter ages, and the exhaust oil content will continue to increase. To solve this problem, many users will add a post-oil-gas separator and separation filter in the exhaust pipe, and stop the vacuum pump from time to time to replenish lubricating oil. These operations increase a lot of equipment costs and after-sales costs, and the downtime will also affect the user's production.

[0005] Therefore, it is necessary to develop an oil-lubricated vacuum pump exhaust oil mist separation and recovery device to solve the above technical problems. Utility Model Content

[0006] The embodiment of the utility model provides an oil-lubricated vacuum pump exhaust oil mist separation and recovery device to solve the technical problem that the existing oil-gas separator has a general separation effect and requires irregular maintenance.

[0007] An oil-lubricated vacuum pump exhaust oil mist separator and recoverer provided in an embodiment of the utility model comprises a vertically arranged cylinder, the bottom of the cylinder is provided with an air inlet pipe connected to the interior thereof, the top of the cylinder is provided with an exhaust pipe connected to the interior thereof; the interior of the cylinder is provided with multiple layers of partitions spaced apart along its height direction, one end of the partition is fixedly connected to the inner side wall of the cylinder, the other end of the partition is inclined downward, and a gap is left between the other end of the partition and the inner side wall of the cylinder for the circulation of oil-gas mixture, and the multiple layers of the partitions are arranged in a staggered manner.

[0008] Optionally, a sewage outlet blocked by a screw plug is provided at the bottom of the cylinder, and the upper end of the air inlet pipe extends into the cylinder and is at least higher than the sewage outlet.

[0009] Optionally, connecting flanges are provided on both the air inlet pipe and the exhaust pipe.

[0010] The embodiment of the utility model has the following beneficial effects: the cylinder is arranged vertically, the air inlet pipe and the air exhaust pipe are respectively arranged at the bottom and the top of the cylinder, and multiple layers of partitions are arranged at intervals inside the cylinder along its height direction. After the oil-gas mixture enters the cylinder, it can gradually rise at a certain speed, and collide with the multiple layers of partitions in turn during the rising process, so that the lubricating oil carried by the oil-gas mixture adheres to the surface of the partition, gathers to form large oil droplets, and then gathers to the bottom of the cylinder under the action of gravity, and finally flows back to the oil tank of the vacuum pump through the air inlet pipe for recycling. Most of the lubricating oil in the gas can be separated and recovered, effectively reducing the exhaust oil content and fuel consumption of the vacuum pump. At the same time, there is no filter element inside, and it is maintenance-free for life, which effectively reduces the equipment cost and after-sales cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0013] The numbers in the figure represent:

[0014] 1. Cylinder; 2. Inlet pipe; 3. Exhaust pipe; 4. Connecting flange; 5. Partition; 6. Oil and gas channel; 7. Drain outlet. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "top" and "bottom", generally refer to the top and bottom of the device in actual use or working state, specifically the direction of the drawing in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0016] See also Figure 1 As shown, the embodiment of the utility model provides an oil-lubricated vacuum pump exhaust oil mist separation and recovery device, comprising a vertically arranged cylinder 1, an air intake pipe 2 connected to the interior of the cylinder 1 is arranged at the bottom of the cylinder 1, and an exhaust pipe 3 connected to the interior of the cylinder 1 is arranged at the top of the cylinder 1, wherein the air intake pipe 2 is connected to the oil tank exhaust port of the oil-lubricated vacuum pump, and the exhaust pipe 3 is connected to the exhaust pipes such as the vacuum exhaust pipe in the central vacuum system, so that the oil-gas mixture discharged by the vacuum pump can enter the cylinder 1 from the air intake pipe 2 and be discharged from the exhaust pipe 3. In order to facilitate the connection, a connecting flange 4 can be arranged on the air intake pipe 2 and the exhaust pipe 3.

[0017] The interior of the cylinder 1 is provided with multiple layers of partitions 5 at intervals along its height direction. One end of the partition 5 is fixedly connected to the inner wall of the cylinder 1, and a gap is left between the other end of the partition 5 and the inner wall of the cylinder 1 for the oil-gas mixture to flow. The multiple layers of partitions 5 are arranged in a staggered manner to form a serpentine oil-gas passage 6 between the intake pipe 2 and the exhaust pipe 3. After the oil-gas mixture enters the cylinder 1, it can rise along the oil-gas passage 6 at a certain speed, and collide with the multiple layers of partitions 5 in sequence under the inertia of the rise, so that the lubricating oil carried in the oil-gas mixture adheres to the surface of the partition 5; the other end of the partition 5 is tilted downward, and the lubricating oil attached to the surface of the partition 5 can be gathered to form small oil droplets through affinity, and the small oil droplets gradually gather to form large oil droplets. The large oil droplets can flow to the bottom of the cylinder 1 along the surface of the partition 5 and the inner wall of the cylinder 1 under the action of gravity, and finally flow back to the oil tank of the vacuum pump through the intake pipe 2 for recycling.

[0018] Furthermore, the embodiment of the utility model is also provided with a drain port 7 sealed with a screw plug at the bottom of the cylinder 1, and the upper end of the air intake pipe 2 extends into the cylinder 1 and is at least higher than the drain port 7. When the water content in the oil-gas mixture is high, condensed water will be separated, and the separated lubricating oil and condensed water will gather at the bottom of the cylinder 1, and the condensed water and other impurities in the lubricating oil will be deposited at the bottom of the lubricating oil; when the oil level exceeds the height of the upper end of the air intake pipe 2, the lubricating oil in the upper layer can flow back to the oil tank of the vacuum pump through the air intake pipe 2, and the condensed water and impurities in the lower layer can be discharged through the drain port 7.

[0019] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present invention. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil-lubricated vacuum pump exhaust oil mist separation and recovery device, characterized in that: It comprises a vertically arranged cylinder, wherein an air inlet pipe connected to the interior is arranged at the bottom of the cylinder, and an exhaust pipe connected to the interior is arranged at the top of the cylinder; a plurality of partitions are arranged at intervals along the height direction of the cylinder, one end of the partition is fixedly connected to the inner wall of the cylinder, the other end of the partition is inclined downward, and a gap is left between the other end of the partition and the inner wall of the cylinder for the oil-gas mixture to flow, and the plurality of partitions are arranged in a staggered manner.

2. The oil-lubricated vacuum pump exhaust oil mist separation and recovery device according to claim 1, characterized in that: The bottom of the cylinder is provided with a sewage outlet blocked by a screw plug, and the upper end of the air inlet pipe extends into the cylinder and is at least higher than the sewage outlet.

3. The oil-lubricated vacuum pump exhaust oil mist separation and recovery device according to claim 1, characterized in that: The air inlet pipe and the exhaust pipe are both provided with connecting flanges.

Images