Oil cylinder return oil filtering device

Abstract

The utility model discloses an oil cylinder return oil filtering device which comprises cylinder covers, a filtering cylinder, an oil way and a filtering structure, the two ends of the filtering cylinder are open, and the two cylinder covers are detachably arranged at the two ends of the filtering cylinder; each barrel cover is communicated with an oil way, a cushion valve is arranged on each oil way to control the oil return speed, one oil way is connected with the oil cylinder, and the other oil way is connected with the oil tank; two filtering structures which are oppositely arranged are arranged in the filtering cylinder, each filtering structure comprises a filter screen hopper, a magnetic ring, a baffle and a limiting hinge piece, the filter screen hoppers are arranged in the cylinder wall of the filtering cylinder, and the contraction openings of the filter screen hoppers in the two filtering structures are oppositely arranged; the magnetic ring is arranged at the contraction opening of the filter screen hopper; the baffle is in magnetic attraction connection with the magnetic ring through the limiting hinge piece. The hydraulic oil filter can filter and collect oil in an oil inlet process and an oil return process, so that the hydraulic oil is efficiently filtered, and the hydraulic oil filter is convenient to maintain and replace.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil cylinder filtering technical field, especially relates to a oil cylinder oil return filter device. BACKGROUND

[0002] Hydraulic system is widely used in industrial production, and oil cylinder as an important part of the hydraulic system, its normal operation is important for the stability of the whole system.

[0003] In the hydraulic system, the oil circulation process will gradually accumulate debris, dust and other impurities (such as sand, fiber residue, oxide, paint peeling and rubber or plastic particles), these impurities will not be removed in time, will cause damage to the oil cylinder and other hydraulic components, shorten the service life of equipment, and may cause failure.

[0004] In the related art, the common oil cylinder oil return filter device mainly focuses on single direction filtering, that is, usually only the impurities in the oil return process or oil inlet process are filtered and treated, this design can block part of the impurities, but the oil tank and the oil cylinder are a circulating oil circuit system, once the oil supply direction changes, the residual impurities in the oil cylinder still exist, and then affect the normal operation of the oil cylinder. SUMMARY

[0005] The utility model aims at at least one of the above technical problems in the technical field.

[0006] In order to achieve the above purpose, the utility model discloses a kind of oil cylinder oil return filter device, it include: cylinder cover, filter cartridge, oil circuit and filter structure, wherein, the filter cartridge two ends are open, two described cylinder cover is detachably arranged at the two ends of the filter cartridge;Every described cylinder cover is communicated with the oil circuit, the oil circuit is provided with buffer valve, to control the oil return speed, wherein one described oil circuit is connected with oil cylinder, another described oil circuit is connected with oil tank;Two described filter structures are arranged in the filter cartridge, and the filter structure includes filter screen hopper, magnetic ring, baffle and limit hinge, wherein, the filter screen hopper is arranged in the cylinder wall of the filter cartridge, and the filter screen hopper retraction of two described filter structures is oppositely arranged;The magnetic ring is arranged at the retraction of the filter screen hopper;The baffle is connected with the magnetic ring by the limit hinge.

[0007] In addition, the oil cylinder oil return filter device according to the utility model can also have the following additional technical features.

[0008] As a further description of the above technical solutions: the inner side of the cylinder cover is connected with the outer wall of the filter cartridge by screw thread.

[0009] As a further description of the above technical solution: the limiting hinge piece comprises a hinge joint, a connecting rod and a limiting rod, wherein the hinge joint is arranged on the filter screen hopper; one end of the connecting rod is connected with the baffle, and the other end is hingedly connected with the hinge joint; the limiting rod is arranged on the connecting rod, and after the baffle is opened to a specific angle, the limiting rod abuts against the hinge joint to limit the opening angle of the baffle.

[0010] As a further description of the above technical solution: the limiting rod is connected with the hinge joint and is provided with a reset spring, so as to reset the baffle after the oil return speed in the filter cartridge is reduced.

[0011] As a further description of the above technical solution: the outer ring size of the baffle is not less than the outer ring size of the magnetic ring.

[0012] As a further description of the above technical solution: the connecting part of the filter cartridge and the cartridge cover is further provided with a sealing ring.

[0013] As a further description of the above technical solution: the outer ring of the baffle is embedded with a magnetic ring connected with the magnetic attraction of the magnetic ring.

[0014] The oil cylinder oil return filtering device can bidirectionally filter and collect during the oil inletting process and the oil return process, so that the hydraulic oil can be efficiently filtered, and the maintenance and replacement are facilitated.

[0015] The additional aspects and advantages of the present application will be partially given in the following description, and will become apparent from the following description or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0017] Figure 1 is a structural schematic view of an oil cylinder oil return filtering device according to one embodiment of the present application;

[0018] Figure 2 is a structural schematic view of an oil cylinder oil return filtering device according to one embodiment of the present application;

[0019] Figure 3 is a schematic view of a filtering structure according to one embodiment of the present application;

[0020] Figure 4 is a schematic view of a local A enlarged structure according to one embodiment of the present application;

[0021] Figure 5is a schematic diagram of a filter structure according to another embodiment of the utility model;

[0022] Figure 6 is a schematic diagram of an internal structure in a use state of an oil cylinder oil return filter device according to one embodiment of the utility model;

[0023] Figure 7 is a schematic diagram of an internal structure in a use state of an oil cylinder oil return filter device according to another embodiment of the utility model;

[0024] Figure 8 is a schematic diagram of an installation structure of an oil cylinder oil return filter device according to one embodiment of the utility model;

[0025] As shown in the figure:

[0026] 100, cylinder cover; 200, filter cylinder; 300, oil circuit; 301, buffer valve; 400, filter structure; 410, filter screen hopper; 420, magnetic ring; 430, baffle; 440, limiting hinge; 441, hinge joint; 442, connecting rod; 443, limiting rod; 500, oil cylinder; 600, oil tank. DETAILED DESCRIPTION

[0027] The embodiments of the utility model are described in detail below, examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the utility model, and cannot be understood as a limitation of the utility model.

[0028] The oil cylinder oil return filter device of the embodiments of the utility model is described below in conjunction with the drawings.

[0029] As Figure 1 , Figure 2 and Figure 8 shown, the oil cylinder oil return filter device of the embodiments of the utility model can include cylinder cover 100, filter cylinder 200, oil circuit 300 and filter structure 400.

[0030] Among them, the filter cylinder 200 is open at both ends, and the two cylinder covers 100 are detachably arranged at both ends of the filter cylinder 200, and a sealing ring is further arranged at the connection between the filter cylinder 200 and the cylinder cover 100 to enhance the sealing of the connection. As a possible case, the inner side of the cylinder cover 100 is threadedly connected with the outer wall of the filter cylinder 200, and relevant staff can realize the disassembly and installation of the two by rotating the filter cylinder 200 or the cylinder cover 100.

[0031] Each cylinder cover 100 is communicated with an oil passage 300, and a buffer valve 301 is arranged on the oil passage 300 to control the oil return speed. One of the oil passages 300 is connected with the oil cylinder 500, and the other oil passage 300 is connected with the oil tank 600.

[0032] It should be noted that when the relevant staff opens the buffer valve 301, the flow rate of the hydraulic oil in the oil passage 300 is reduced to reduce the impact of high-speed hydraulic oil. When the relevant staff closes the buffer valve 301, the flow rate of the hydraulic oil in the oil passage 300 is increased.

[0033] The filter cartridge 200 is provided with two oppositely arranged filter structures 400, as shown in the figure. Figures 3 to 5 The filter structure 400 includes a filter screen bucket 410, a magnetic ring 420, a baffle 430 and a limiting hinge 440.

[0034] The filter screen bucket 410 is arranged in the cylinder wall of the filter cartridge 200, the contraction openings of the filter screen buckets 410 in the two filter structures 400 are oppositely arranged, the magnetic ring 420 is arranged at the contraction opening of the filter screen bucket 410, and the baffle 430 is connected with the magnetic ring 420 by the limiting hinge 440.

[0035] As a possible case, a magnetic ring is embedded on the outer ring of the baffle 430 and magnetically connected with the magnetic ring 420.

[0036] In addition, the outer ring size of the baffle 430 is not less than the outer ring size of the magnetic ring 420, which can ensure that the baffle 430 can be opened when the hydraulic oil flows forward, and the baffle 430 can be limited when the hydraulic oil flows reversely, thereby ensuring the pressing effect of the baffle 430 and the magnetic ring 420.

[0037] It should be noted that the limiting hinge 440 can limit the opening angle of the baffle 430, so that the baffle 430 cannot be reset by the magnetic ring 420 due to the too large opening angle.

[0038] Specifically, as shown in the figure, Figure 6 When the relevant staff flows the hydraulic oil in the oil cylinder 500 back to the oil tank 600, the relevant staff can close the buffer valve 301, so that the flow rate of the hydraulic oil is increased, and the hydraulic oil flows from the oil passage 300 close to the oil cylinder 500 into the filter cartridge 200, and the baffle 430 close to the oil cylinder 500 is opened, so that the hydraulic oil flows from the filter screen bucket 410 and the contraction opening of the filter screen bucket 410 to the oil tank 600. Due to the impact of the hydraulic oil, the baffle 430 close to the oil tank 600 is closed, so that the hydraulic oil flows into the oil tank 600 after being filtered by the filter screen bucket 410 close to the oil tank 600, and the impurities in the hydraulic oil are filtered by the filter screen bucket 410 and remain between the two filter structures 400.

[0039] AsFigure 7 As shown, when the relevant staff pushes the hydraulic oil in the oil tank 600 into the oil cylinder 500, the hydraulic oil flows in the opposite direction, at this time, the baffle 430 close to the oil tank 600 is opened, and the baffle 430 close to the oil cylinder 500 is closed, and the impurities in the hydraulic oil in the oil tank 600 are also filtered between the two filter structures 400.

[0040] It should be noted that in the normal working state, the relevant staff can open the buffer valve 301, and the hydraulic oil cannot flush the baffle 430 due to the low flow rate, and directly flows from the two filter screen buckets 410, and the relevant staff can clean regularly and close the buffer valve 301 to filter and collect the impurities in the hydraulic oil.

[0041] In addition, when cleaning the filter cartridge 200, the relevant staff can disassemble the filter cartridge 200 from the two cartridge covers 100, and clean the impurities between the two filter structures 400.

[0042] In an embodiment of the present application, as shown in Figure 4 The limiting hinge 440 includes a hinge 441, a connecting rod 442 and a limiting rod 443.

[0043] The hinge 441 is arranged on the filter screen bucket 410, one end of the connecting rod 442 is connected with the baffle 430, the other end is connected with the hinge 441, and the limiting rod 443 is arranged on the connecting rod 442. After the baffle 430 is opened to a certain angle, the limiting rod 443 abuts against the hinge 441 to limit the opening angle of the baffle 430.

[0044] It should be noted that one end of the hinge 441 is fixedly connected with the filter screen bucket 410 by welding, and the other end is provided with a slot for hinged installation, the end of the connecting rod 442 is hingedly arranged in the slot, and the limiting rod 443 is a folding rod structure, that is, one end of the limiting rod 443 is connected with the hinged end of the connecting rod 442, and the other end extends to the welded end of the hinge 441.

[0045] Therefore, when the hydraulic oil flushes the baffle 430, the baffle 430 drives the connecting rod 442 to rotate, and when the connecting rod 442 rotates, the limiting rod 443 rotates, and when the end of the limiting rod 443 abuts against the hinge 441, the baffle 430 is limited, and at this time, the baffle 430 and the magnetic ring 420 maintain a magnetic attraction degree, under the high-speed impact of the hydraulic oil, the baffle 430 is kept in the open state, and when the flow rate of the hydraulic oil slows down or the buffer valve 301 is opened, the impact force on the baffle 430 is small, and the magnetic ring 420 attracts the baffle 430 to reset.

[0046] In another embodiment of the utility model, reset spring is connected between limiting rod 443 and hinged joint 441, so that reset baffle 430 is reset after the oil return speed in filter cartridge 200 is reduced.

[0047] It should be noted that when baffle 430 is pushed open by hydraulic oil, connecting rod 442 rotates, and then limiting rod 443 rotates towards hinged joint 441, at this time, reset spring is compressed, and when the flow rate of hydraulic oil changes, baffle 430 is reset by reset spring on one hand and is adsorbed by magnetic ring 420 on the other hand, and the two cooperate to better ensure the reset of baffle 430.

[0048] In another embodiment of the utility model, in order to avoid iron filings in oil path 300 being adsorbed, strong magnetic mesh plates can be respectively arranged on the oil paths 300 of the two cartridge covers 100 to adsorb the iron filings, so as to avoid the iron core being adsorbed on magnetic ring 420 or baffle 430.

[0049] In summary, the oil cylinder oil return filtering device according to the embodiment of the utility model can bidirectionally filter and collect during the oil inlet process and the oil return process, thereby efficiently filtering the hydraulic oil, and facilitating maintenance and replacement.

[0050] In the description of the specification, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0051] In the description of the specification, the description of the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the description of the specification, the illustrative description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0052] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A cylinder oil return filter device characterized by comprising: The utility model relates to a filter device for hydraulic system, including: cylinder cover (100), filter cartridge (200), oil circuit (300) and filter structure (400), wherein, The both ends of filter cartridge (200) are open, and two cylinder covers (100) are detachably arranged at the both ends of filter cartridge (200); Each cylinder cover (100) is communicated with oil circuit (300), and buffer valve (301) is arranged on oil circuit (300) to control the oil return speed, wherein one oil circuit (300) is connected with oil cylinder (500), and the other oil circuit (300) is connected with oil tank (600); Two filter structures (400) are arranged in filter cartridge (200) oppositely, and filter structure (400) comprises filter screen hopper (410), magnetic ring (420), baffle (430) and limiting hinge (440), wherein, Filter screen hopper (410) is arranged in the cylinder wall of filter cartridge (200), and the contraction openings of filter screen hopper (410) in two filter structures (400) are arranged oppositely; Magnetic ring (420) is arranged at the contraction opening of filter screen hopper (410); Baffle (430) is connected with magnetic ring (420) by limiting hinge (440) magnetically.

2. The cylinder oil return filter apparatus as set forth in claim 1, wherein The inner side of cylinder cover (100) is connected with the outer wall of filter cartridge (200) by screw thread.

3. The cylinder oil return filter apparatus as set forth in claim 1, wherein Limiting hinge (440) comprises hinge joint (441), connecting rod (442) and limiting rod (443), wherein, Hinge joint (441) is arranged on filter screen hopper (410); One end of connecting rod (442) is connected with baffle (430), and the other end is connected with hinge joint (441) by hinge joint; Limiting rod (443) is arranged on connecting rod (442), and after baffle (430) is opened to a specific angle, limiting rod (443) abuts against hinge joint (441) to limit the opening angle of baffle (430).

4. The cylinder oil return filter apparatus as set forth in claim 3, wherein Reset spring is connected between limiting rod (443) and hinge joint (441) to reset baffle (430) after the oil return speed in filter cartridge (200) is reduced.

5. The cylinder oil return filter apparatus as set forth in claim 1, wherein The outer ring size of baffle (430) is not less than the outer ring size of magnetic ring (420).

6. The cylinder oil return filter apparatus as set forth in claim 1, wherein Sealing ring is further arranged at the connecting position of filter cartridge (200) and cylinder cover (100).

7. The cylinder oil return filter apparatus as set forth in claim 1, wherein Magnetic ring is embedded in the outer ring of baffle (430) and connected with magnetic ring (420) magnetically.

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