Return oil filtering device of air compressor

Abstract

The utility model discloses an air compressor return oil filtering device which comprises an oil return pipe set connected to an oil gas barrel from an air compressor main machine, a filter used for filtering oil liquid is arranged on the oil return pipe set, and a bypass pipe set is arranged on the oil return pipe set. The oil return pipe set and the bypass pipe set are respectively provided with an oil return one-way valve and a valve set, the oil return one-way valve is used for preventing oil from flowing back, and the valve set is used for switching the oil passing state of the oil return pipe set and the oil passing state of the bypass pipe set. The oil return pipe set in the blocked state can stop working, oil return can be conducted through the bypass pipe set, and the blocked oil return pipe set is cleaned on the premise that oil return work of a main engine is not affected.

Description

Technical Field

[0001] This utility model relates to the field of air compressor components and structures, and in particular to an air compressor oil return filter device. Background Technology

[0002] The air compressor contains an oil-gas separator, and there is a device for oil return between the air compressor main unit and the oil-gas separator, commonly known as an oil return pipe. The main function of the oil return pipe is to recover and reuse lubricating oil, ensuring the long-term good working condition of the air compressor.

[0003] Adding a filter to the return oil pipe can filter the oil coming back and remove impurities. However, since the existing return oil pipes are generally thin pipes with a small diameter, they are prone to clogging. The accumulated impurities are difficult to clean, and cleaning requires stopping the main unit before cleaning the return oil pipe, which is very costly. Therefore, further improvements are needed. Utility Model Content

[0004] In view of the defects of the existing technology, the technical problem to be solved by this utility model is to provide a device that can conveniently clean the return oil pipe, which can close the main return oil path by switching the path, so that the main return oil path can be cleaned.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] An air compressor oil return filtration device includes an oil return pipe assembly connected from the air compressor main unit to the oil-gas separator, a filter for filtering oil is provided on the oil return pipe assembly, a bypass pipe assembly is provided on the oil return pipe assembly, an oil return check valve for preventing oil backflow is provided on both the oil return pipe assembly and the bypass pipe assembly, and a valve assembly for switching the oil flow state of the oil return pipe assembly and the bypass pipe assembly.

[0007] Furthermore, the oil return pipe assembly in this utility model includes a front oil pipe connected to the air compressor main unit, a rear oil pipe connected to the oil-gas separator, a valve oil pipe connected to the front oil pipe, and a middle oil pipe connecting the valve oil pipe and the rear oil pipe.

[0008] Furthermore, the bypass pipe assembly in this utility model includes a bypass main pipe connected to the rear end of the intermediate section oil pipe, and a bypass valve pipe connecting the valve oil pipe and the bypass main pipe.

[0009] Furthermore, the filter in this utility model includes an oil filter head disposed in the middle section of the oil pipe and a filter element installed on the oil filter head.

[0010] Furthermore, the valve assembly in this utility model includes a main valve one disposed on the valve oil pipe and a main valve two disposed at the rear end of the middle section oil pipe, as well as a secondary valve one disposed on the bypass valve pipe and a secondary valve two disposed at the rear end of the bypass main pipe.

[0011] Furthermore, in this utility model, the oil flow state of the valve group is such that the main valve one and the main valve two, and the auxiliary valve one and the auxiliary valve two respectively control the oil return pipe group and the bypass pipe group to alternately open and close.

[0012] In summary, the advantages of this utility model over the prior art are:

[0013] This invention uses a valve assembly to close the return oil pipe assembly and open the bypass pipe assembly to allow oil to flow through. This allows the blocked return oil pipe assembly to stop working, while the bypass pipe assembly allows oil to return through, thus clearing the blocked return oil pipe assembly without affecting the main unit's oil return operation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0015] Figure 2 This is a plan view of the present invention;

[0016] Figure 3 This is a plan view of the return oil pipe assembly of this utility model;

[0017] Figure 4 This is a plan view of the bypass pipe assembly of this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0019] like Figures 1 to 4 The present invention preferably provides an air compressor oil return filter device, comprising an oil return pipe assembly 1 connecting the air compressor main unit to the oil-gas separator, a filter 2 for filtering oil on the oil return pipe assembly 1, a bypass pipe assembly 3 on the oil return pipe assembly 1, an oil return check valve 4 for preventing oil backflow on both the oil return pipe assembly 1 and the bypass pipe assembly 3, and a valve assembly 5 for switching the oil flow status of the oil return pipe assembly 1 and the bypass pipe assembly 3. The filter device is used to filter the oil returning to the oil-gas separator on the oil return pipe assembly, reducing impurities before it enters the oil-gas separator. The bypass pipe assembly allows oil to pass through, and is used when the oil return pipe assembly is blocked or when maintenance is required and the unit is temporarily shut down. The valve assembly closes the oil return pipe assembly and opens the bypass pipe assembly, allowing oil to flow through. Maintenance performed on the oil return pipe assembly during this period will not affect the oil delivery, allowing the air compressor to continue operating. The return oil check valve is used to prevent oil backflow.

[0020] The oil return pipe assembly 1 described in this utility model includes a front oil pipe 11 connecting to the air compressor main unit, a rear oil pipe 12 connecting to the oil-gas separator, a valve oil pipe 13 connecting to the front oil pipe 11, and a middle oil pipe 14 connecting the valve oil pipe 13 and the rear oil pipe 12. The front oil pipe, rear oil pipe, valve oil pipe, and middle oil pipe can be connected by using various straight joints and elbows.

[0021] The bypass pipe assembly 3 described in this utility model includes a bypass main pipe 31 connected to the rear end of the intermediate section oil pipe 14, and a bypass valve pipe 32 connecting the valve oil pipe 13 and the bypass main pipe 31. The bypass main pipe and the bypass valve pipe can be connected by straight joints or elbows.

[0022] The filter 2 described in this invention includes an oil filter head 21 disposed in the middle section of the oil pipe 14, and a filter element 22 installed on the oil filter head 21. The oil filter head and filter element can adopt existing technology to achieve the purpose of filtering oil impurities. The filter element is selected to be detachable, so that it can be replaced at any time.

[0023] The valve assembly 5 described in this utility model includes a main valve 51 located on the valve oil pipe 13 and a main valve 52 located at the rear end of the intermediate oil pipe 14, as well as a secondary valve 53 located on the bypass valve pipe 32 and a secondary valve 54 located at the rear end of the bypass main pipe 31. The main valve 51 is located on the valve oil pipe at the rear side of the connection to the bypass valve pipe. The main valve 54 is located on the intermediate oil pipe at the front side of the connection to the bypass main pipe. The purpose of this arrangement is that when the main valves 51 and 52 are closed and the secondary valves 53 and 54 are open, the oil will be cut off, no longer entering the valve oil pipe and intermediate oil pipe, and no longer passing through the filter. Instead, the oil will continue to flow through the bypass valve pipe and bypass main pipe, truly achieving the goal of cleaning or replacing the filter element and other work on the return oil pipe assembly without affecting the main unit's return oil operation.

[0024] In this invention, the valve assembly 5 is operated in an oil-flow state by main valve 51, main valve 52, and auxiliary valves 53 and 54, which respectively control the return oil pipe assembly 1 and the bypass pipe assembly 3 to open and close alternately. Main valves 1 and 2, and auxiliary valves 1 and 2 should open and close alternately to prevent oil circuit closure. When main valves 1 and 2 open simultaneously, auxiliary valves 1 and 2 should close simultaneously, and vice versa.

[0025] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An air compressor oil return filter device, comprising an oil return pipe assembly (1) connecting the air compressor main unit to the oil-gas separator, characterized in that: A filter (2) for filtering oil is provided on the return oil pipe assembly (1), a bypass pipe assembly (3) is provided on the return oil pipe assembly (1), and a return oil check valve (4) for preventing oil backflow is provided on both the return oil pipe assembly (1) and the bypass pipe assembly (3), as well as a valve assembly (5) for switching the oil flow status of the return oil pipe assembly (1) and the bypass pipe assembly (3).

2. The air compressor oil return filter device according to claim 1, characterized in that: The return oil pipe assembly (1) includes a front section oil pipe (11) connecting to the air compressor main unit, a rear section oil pipe (12) connecting to the oil-gas separator, a valve oil pipe (13) connecting to the front section oil pipe (11), and a middle section oil pipe (14) connecting the valve oil pipe (13) and the rear section oil pipe (12).

3. The air compressor oil return filter device according to claim 2, characterized in that: The bypass pipe assembly (3) includes a bypass main pipe (31) connected to the rear end of the intermediate section oil pipe (14), and a bypass valve pipe (32) connecting the valve oil pipe (13) and the bypass main pipe (31).

4. The air compressor oil return filter device according to claim 2, characterized in that: The filter (2) includes an oil filter head (21) disposed in the middle section of the oil pipe (14) and a filter element (22) mounted on the oil filter head (21).

5. The air compressor oil return filter device according to claim 3, characterized in that: The valve assembly (5) includes a main valve (51) installed on the valve oil pipe (13) and a main valve (52) installed at the rear end of the middle section oil pipe (14), as well as a secondary valve (53) installed on the bypass valve pipe (32) and a secondary valve (54) installed at the rear end of the bypass main pipe (31).

6. An air compressor oil return filter device according to any one of claims 1-5, characterized in that: The oil-flow state of the valve group (5) is controlled by the main valve one (51), the main valve two (52), the auxiliary valve one (53), and the auxiliary valve two (54) respectively to control the oil return pipe group (1) and the bypass pipe group (3) to take turns opening and closing.

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