Hydraulic return oil filter

Abstract

The utility model relates to the field of filters, in particular to a hydraulic return oil filter which comprises a barrel, a barrel cover and a filter element, an oil inlet is formed in the barrel, an oil outlet is formed in the barrel cover, the filter element is fixedly connected with the barrel cover, and the filter element is arranged in the barrel and divides a cavity in the barrel into an inner cavity and an outer cavity. The cylinder cover is detachably and fixedly connected with the cylinder body, a first connecting hole and a second connecting hole are further formed in the cylinder cover, the position of the first connecting hole corresponds to the position of the inner cavity, the position of the second connecting hole corresponds to the position of the outer cavity, the first connecting hole is further connected with a first observation bottle, and the second connecting hole is connected with a second observation bottle. By arranging the first observation bottle and the second observation bottle, oil before filtering and oil after filtering are respectively led out and compared, so that the filtering effect can be conveniently distinguished, and whether the filter element needs to be replaced or not is judged.

Description

Technical Field

[0001] The utility model relates to the field of filters, in particular to a hydraulic return oil filter. Background Technique

[0002] The return oil filter is mainly installed on the return oil pipeline of the hydraulic system. Various dirt such as abrasive particles generated during the operation of various hydraulic components can be intercepted by setting an oil filter on the return oil pipeline to avoid returning to the fuel tank again. The allowable pressure difference of the oil filter on the return oil pipeline ranges from 0.3 to 0.5 MPa according to different pressure levels. The accuracy is specifically determined according to the requirements of the oil contamination degree.

[0003] At present, the main body of the return oil filter is closed and invisible, making it difficult to know the actual situation of the filter element inside without disassembly. Therefore, it is generally replaced according to the filter element replacement period set by the manufacturer. However, for machines with different working intensities and different working conditions, the actual service life of the filter element is different, which often leads to replacement when the filter element life is not exhausted, resulting in waste. Therefore, it is necessary to improve such a structure to overcome the above defects. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a hydraulic return oil filter. The utility model is realized through the following technical solutions:

[0005] A hydraulic return oil filter includes a cylinder body, a cylinder cover and a filter element. An oil inlet is arranged on the cylinder body, and an oil outlet is arranged on the cylinder cover. The filter element is fixedly connected with the cylinder cover, and the filter element is arranged inside the cylinder body and divides the cavity inside the cylinder body into an inner cavity and an outer cavity. The cylinder cover is detachably and fixedly connected with the cylinder body. The cylinder cover is also provided with a first connection hole and a second connection hole. The position of the first connection hole corresponds to the inner cavity, and the position of the second connection hole corresponds to the outer cavity. The first connection hole is also connected with a first observation bottle, and the second connection hole is connected with a second observation bottle.

[0006] In the above technical solution: the cylinder body is used to carry the rest of the components and form a closed container with the cylinder cover; the filter element is used to filter impurities; the oil inlet is used for supplying oil to enter; the oil outlet is used for supplying the filtered oil to flow out; the outer cavity is used to accommodate the unfiltered oil; the inner cavity is used to temporarily store the filtered oil until it is full and then flows out of the oil outlet; the first connection hole is used to connect the inner cavity with the first observation bottle; the second connection hole is used to connect the outer cavity with the second observation bottle; the first observation bottle is used to observe the situation of the filtered oil; the second observation bottle is used to observe the situation of the oil before filtration.

[0007] The further setting of the utility model is that both the first observation bottle and the second observation bottle are transparent.

[0008] In the above technical solution: both the first observation bottle and the second observation bottle are transparent to facilitate observing their interiors.

[0009] A further setting of the present utility model is that the first observation bottle and the second observation bottle are arranged adjacent to each other.

[0010] In the above technical solution: the first observation bottle and the second observation bottle are arranged adjacent to each other to facilitate comparison.

[0011] A further setting of the present utility model is that a first return pipe is connected to the first observation bottle, and the other end of the first return pipe is connected to the inner cavity.

[0012] In the above technical solution: the first return pipe is used to return the oil in the first observation bottle to the inner cavity, so as to ensure that the oil in the first observation bottle can be kept updated.

[0013] A further setting of the present utility model is that a second return pipe is connected to the second observation bottle, and the other end of the first return pipe is connected to the outer cavity.

[0014] In the above technical solution: the second return pipe is used to return the oil in the second observation bottle to the outer cavity, so as to ensure that the oil in the second observation bottle can be kept updated.

[0015] The present utility model discloses a hydraulic oil return filter. Compared with the prior art:

[0016] 1. By setting the first observation bottle and the second observation bottle, the present utility model respectively leads out the oil before and after filtration and compares them, so that the filtration effect can be conveniently distinguished, and thus it can be judged whether the filter element needs to be replaced;

[0017] 2. The present utility model also sets the first return pipe and the second return pipe to make the oil in the first observation bottle and the second observation bottle more updated, thereby improving the real-time performance of judging the remaining service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the present utility model;

[0019] Figure 2 is a top view of the present utility model;

[0020] Figure 3 is a sectional view taken along line A-A of the present utility model;

[0021] Figure 4 is a sectional view taken along line B-B of the present utility model.

[0022] The corresponding part names represented by the numbers and letters in the figure: 10 - cylinder body; 101 - oil inlet; 102 - inner cavity; 103 - outer cavity; 20 - cylinder cover; 201 - oil outlet; 202 - first connection hole; 203 - second connection hole; 30 - filter element; 40 - first observation bottle; 401 - first return pipe; 50 - second observation bottle; 501 - second return pipe. Detailed implementation manners

[0023] The embodiments of the present invention will be described in detail below. These embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0024] As Figure 1-2 shown, a hydraulic oil return filter proposed by the present invention includes a cylinder body 10, a cylinder cover 20 and a filter element 30. An oil inlet 101 is provided on the cylinder body 10, and an oil outlet 201 is provided on the cylinder cover 20. The filter element 30 is fixedly connected to the cylinder cover 20, and the filter element 30 is arranged inside the cylinder body 10 and divides the cavity inside the cylinder body 10 into an inner cavity 102 and an outer cavity 103. The cylinder cover 20 is detachably and fixedly connected to the cylinder body 10. The cylinder cover 20 is also provided with a first connection hole 202 and a second connection hole 203. The position of the first connection hole 202 corresponds to that of the inner cavity 102, and the position of the second connection hole 203 corresponds to that of the outer cavity 103. The first connection hole 202 is also connected to a first observation bottle 40, and the second connection hole 203 is connected to a second observation bottle 50. Among them, one end of the cylinder body 10 is closed and the other end is open; the cylinder cover 20 is detachably fixed to the open end of the cylinder body 10; one end of the first connection hole 202 is located on the bottom surface of the cylinder cover 20, and the other end is located on the side surface of the cylinder cover 20; one end of the second connection hole 203 is located on the bottom surface of the cylinder cover 20, and the other end is located on the side surface of the cylinder cover 20; a first extension pipe is fixedly provided at one end of the first connection hole 202 located on the bottom surface of the cylinder cover 20; a second extension pipe is fixedly provided at one end of the second connection hole 203 located on the bottom surface of the cylinder cover 20.

[0025] As Figure 1-2 shown, for a hydraulic oil return filter proposed by the present invention, both the first observation bottle 40 and the second observation bottle 50 are transparent. Among them, preferably, the first observation bottle 40 is made of glass to avoid oxidation and yellowing of transparent materials such as plastics after long-term use, which affects the judgment of the oil.

[0026] As Figure 1-2As shown, a hydraulic return oil filter proposed by the present utility model, the first observation bottle 40 and the second observation bottle 50 are arranged adjacent to each other. Among them, preferably, the second observation bottle 50 is made of glass to avoid oxidation and yellowing of transparent materials such as plastics after long-term use, which affects the judgment of the oil.

[0027] As Figure 1-2 As shown, a hydraulic return oil filter proposed by the present utility model, a first return pipe 401 is connected to the first observation bottle 40, and the other end of the first return pipe 401 is connected to the inner cavity 102. Among them, preferably, the first return pipe 401 is connected to the upper part of the side wall of the first observation bottle 40.

[0028] As Figure 1-2 As shown, a hydraulic return oil filter proposed by the present utility model, a second return pipe 501 is connected to the second observation bottle 50, and the other end of the second return pipe 501 is connected to the outer cavity 103. Among them, preferably, the second return pipe 501 is connected to the upper part of the side wall of the second observation bottle 50.

[0029] The working principle of the present utility model is as follows:

[0030] a) The unfiltered oil enters the outer cavity of the cylinder body through the oil inlet.

[0031] b) The oil in the outer cavity gradually increases.

[0032] c) The unfiltered oil enters the second observation bottle through the second connection hole, and then returns to the outer cavity through the second return pipe.

[0033] d) At the same time, the unfiltered oil passes through the filter element and enters the inner cavity.

[0034] e) The filtered oil accumulates in the inner cavity.

[0035] f) The filtered oil enters the first observation bottle through the first connection hole, and then returns to the inner cavity through the first return pipe.

[0036] g) After the filtered oil continues to accumulate, it flows out from the oil outlet and re-enters the oil tank of the machine.

[0037] The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent replacements or changes, and should be covered by the protection scope of the present utility model.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising said element.

Claims

1. A hydraulic return oil filter, characterized in that: It includes a cylinder body (10), a cylinder cover (20) and a filter element (30). An oil inlet (101) is provided on the cylinder body (10), and an oil outlet (201) is provided on the cylinder cover (20). The filter element (30) is fixedly connected to the cylinder cover (20), and the filter element (30) is arranged inside the cylinder body (10) and divides the cavity inside the cylinder body (10) into an inner cavity (102) and an outer cavity (103). The cylinder cover (20) is detachably and fixedly connected to the cylinder body (10). The cylinder cover (20) is further provided with a first connection hole (202) and a second connection hole (203). The position of the first connection hole (202) corresponds to that of the inner cavity (102), and the position of the second connection hole (203) corresponds to that of the outer cavity (103). The first connection hole (202) is also connected to a first observation bottle (40), and the second connection hole (203) is connected to a second observation bottle (50).

2. The hydraulic oil return filter according to claim 1, wherein: Both the first observation bottle (40) and the second observation bottle (50) are transparent.

3. A hydraulic oil return filter according to claim 2, characterized in that: The first observation bottle (40) and the second observation bottle (50) are arranged adjacent to each other.

4. The hydraulic oil return filter according to claim 3, wherein: A first return pipe (401) is connected to the first observation bottle (40), and the other end of the first return pipe (401) is connected to the inner cavity (102).

5. The hydraulic oil return filter according to claim 4, characterized in that: A second return pipe (501) is connected to the second observation bottle (50), and the other end of the second return pipe (501) is connected to the outer cavity (103).

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