Filter device for oil return pipe of hydraulic grab bucket

Abstract

The utility model belongs to the technical field of hydraulic oil filtering, and particularly relates to a hydraulic grab bucket oil return pipe filtering device which comprises an oil return pipe, a filtering pipe arranged at one end of the oil return pipe, an oil outlet pipe arranged at the end, away from the oil return pipe, of the filtering pipe and a filtering assembly arranged in the filtering pipe. The hydraulic oil is discharged into the filter pipe through the oil return pipe, the second filter sleeve and the first filter sleeve are arranged on the surface of the oil inlet pipe in a sleeving mode to filter impurities in the hydraulic oil in a multi-layer mode, the impurities and pollutants in return oil can be effectively filtered out, elements of a hydraulic system and the oil quality are protected, and the service life of grab bucket equipment is prolonged; the filter pipe is simple in structure and convenient to use, fault and maintenance cost is reduced, mechanical equipment has more sufficient and stable hydraulic power, the filter pipe is mounted and dismounted by matching with the dismounting assembly and starting the hydraulic cylinder to enable the flange piece b to be attached to the surface of the flange piece a, the interior of the filter pipe is conveniently cleaned, and the use effect is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic oil filtering, and in particular relates to a hydraulic grab bucket oil return pipe filtering device. Background Art

[0002] The return oil line filter is installed at the return oil line of the hydraulic system to filter out metal powder and rubber impurities caused by wear of various components in the oil, so that the oil flowing back to the oil tank remains clean. The filter element of the filter is made of chemical fiber filter material, which has the advantages of high filtering accuracy, large oil flow capacity, small original pressure loss, and large dirt holding capacity. The filter is widely used in hydraulic systems and hydraulic oil pipes of heavy machinery, mining machinery, metallurgical machinery, etc. Due to the long-term use of circulating hydraulic oil, there are many impurities in the hydraulic oil, which needs to be filtered;

[0003] After checking the disclosure (announcement) number: CN217271179U discloses a multi-stage circulation filter module for the oil return pipe of a hydraulic station. This technology discloses "a multi-stage circulation filter module for the oil return pipe of a hydraulic station, including a shell, a filter element is installed inside the shell, an arc-shaped filter plate is arranged inside the filter element, mounting plates are fixedly installed at both ends of the longitudinal axis of the arc-shaped filter plate, the mounting plates are fixedly installed on the top of the shell, a sliding groove is opened on the side wall of one of the mounting plates, a cleaning mechanism is connected to the arc-shaped filter plate, and the cleaning mechanism is installed on the mounting plate and other technical contents, and discloses the multi-stage circulation filter module for the oil return pipe of the hydraulic station, which can not only prevent impurities in the oil from falling into the filter element through the cleaning mechanism, but also facilitate the cleaning of impurities filtered out of the oil, and prevent the arc-shaped filter plate from being blocked, etc. Technical effects";

[0004] Although this design can facilitate the cleaning of impurities filtered out by the oil and prevent the arc-shaped filter plate from being blocked, this design can only clean the surface of the filter plate in actual use. After filtering the hydraulic oil for a long time, the filter plate is easily blocked, resulting in a slow filtering rate of the hydraulic oil, affecting the use of the equipment. In addition, the filter plate cannot be replaced in the above design, which affects the output of the hydraulic oil.

[0005] In order to solve the above problems, the present application proposes a hydraulic grab bucket oil return pipe filtering device. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides a hydraulic grab bucket oil return pipe filter device, which is easy to clean and replace the filter mechanism, ensures the filtering efficiency of the hydraulic oil, and improves the oil output rate.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hydraulic grab bucket oil return pipe filter device, comprising an oil return pipe and a filter pipe arranged at one end of the oil return pipe and an oil outlet pipe arranged at an end of the filter pipe away from the oil return pipe, and also comprising a filter assembly arranged in the filter pipe;

[0008] The filter assembly includes a fixed tube arranged in the filter tube, an oil inlet pipe installed at one end of the fixed tube, and a second filter sleeve installed on the surface of the fixed tube, the second filter sleeve is sleeved on the outer surface of the oil inlet pipe, a first filter sleeve is arranged outside the second filter sleeve, and the first filter sleeve is installed on the surface of the fixed tube.

[0009] As a preferred embodiment of the hydraulic grab bucket oil return pipe filtering device of the utility model, the first filter sleeve is made of a metal fiber filter element material, and the second filter sleeve is composed of a variety of filter membrane materials.

[0010] As a preferred embodiment of the hydraulic grab bucket oil return pipe filtering device of the utility model, a plurality of oil seepage holes arranged in equal intervals are provided on the surface of the oil inlet pipe.

[0011] As a preferred hydraulic grab oil return pipe filtering device of the utility model, a screw block is installed at one end of the oil outlet pipe, a threaded groove is opened on the inner wall surface of the filter tube, the screw block is screwed into the filter tube through the threaded groove, and the fixed pipe is screwed into the threaded hole opened on the surface of the screw block.

[0012] As a preferred embodiment of the utility model, a hydraulic grab bucket return oil pipe filter device further includes a disassembly assembly installed at one end of the return oil pipe, the disassembly assembly includes a flange a installed at one end of the return oil pipe, a flange b installed at one end of the filter pipe, and four hydraulic cylinders installed on one side surface of the flange a, and the protruding ends of the hydraulic cylinders are each equipped with a fixing rod, and the fixing rods all penetrate the flange b and are threadedly connected to a nut arranged on one side of the flange b.

[0013] As a preferred embodiment of the hydraulic grab bucket oil return pipe filtering device of the utility model, sealing gaskets are installed on the surfaces of the flange a and the flange b on one side close to each other.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] A filter assembly is provided on this device. When in use, a fixed tube is provided inside the filter tube, and an oil inlet pipe is installed on the surface of the fixed tube. The hydraulic oil is discharged into the filter tube through the return oil pipe. The impurities in the hydraulic oil are filtered in multiple layers by respectively arranging a second filter sleeve and a first filter sleeve on the surface of the oil inlet pipe. The impurities and pollutants in the return oil can be effectively filtered, the components and oil quality of the hydraulic system are protected, the service life of the grab equipment is increased, the failure and maintenance costs are reduced, and the mechanical equipment has more sufficient and stable hydraulic power. In conjunction with the disassembly assembly, when in use, flange a and flange b are respectively installed at one end of the return oil pipe and the filter tube, and after the fixing rod is inserted into the jack opened on the surface of flange b, the nut is rotated at one end of the fixing rod, and the flange b is fitted to the surface of flange a by starting the hydraulic cylinder, so as to realize the installation and disassembly of the filter tube, facilitate the cleaning of the inside of the filter tube, and achieve good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the filter assembly in the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the first filter sleeve in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the disassembly assembly in the utility model;

[0021] In the figure: 1, oil return pipe; 11, filter pipe; 12, oil outlet pipe;

[0022] 2. Filter assembly; 21. Screw block; 22. Threaded groove; 23. Fixed pipe; 24. Oil inlet pipe; 25. Second filter sleeve; 26. First filter sleeve;

[0023] 3. Disassembly assembly; 31. Flange a; 32. Flange b; 33. Hydraulic cylinder; 34. Fixing rod; 35. Nut. DETAILED DESCRIPTION

[0024] 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, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1

[0026] like Figure 1-Figure 4 As shown;

[0027] A hydraulic grab oil return pipe filtering device comprises an oil return pipe 1, a filtering pipe 11 arranged at one end of the oil return pipe 1, and an oil outlet pipe 12 arranged at an end of the filtering pipe 11 away from the oil return pipe 1.

[0028] In this implementation scheme: After investigation, the public (announcement) number: CN217271179U discloses a multi-stage circulation filter module for the oil return pipe of a hydraulic station. This technology discloses "a multi-stage circulation filter module for the oil return pipe of a hydraulic station, including a shell, a filter element is installed inside the shell, and an arc-shaped filter plate is arranged in the filter element. The arc-shaped filter plate has mounting plates fixedly installed at both ends of the longitudinal axis, and the mounting plates are fixedly installed on the top of the shell. A sliding groove is opened on the side wall of one of the mounting plates, and a cleaning mechanism is connected to the arc-shaped filter plate. The cleaning mechanism is installed on the mounting plate and other technical contents, and discloses the multi-stage circulation filter module for the oil return pipe of the hydraulic station, which can not only prevent impurities in the oil from falling into the filter element through the cleaning mechanism provided Although the design can facilitate the cleaning of impurities filtered out by the oil and prevent the arc filter plate from being blocked, this design can only clean the surface of the filter plate in actual use. After filtering the hydraulic oil for a long time, it is easy to cause the filter plate to be blocked, resulting in a slow filtering rate of the hydraulic oil, affecting the use of the equipment. In addition, the filter plate cannot be replaced in the above design, affecting the oil output of the hydraulic oil. In terms of actual use, this problem is obviously a real problem that is difficult to solve. Therefore, in order to solve this technical problem, a filter component 2 and a disassembly component 3 are added to the application document.

[0029] More specifically:

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown;

[0031] In combination with the above content, it also includes a filter assembly 2 arranged in the filter tube 11, the filter assembly 2 includes a fixed tube 23 arranged in the filter tube 11, an oil inlet pipe 24 installed at one end of the fixed tube 23, and a second filter sleeve 25 installed on the surface of the fixed tube 23, the second filter sleeve 25 is sleeved on the outer surface of the oil inlet pipe 24, and a first filter sleeve 26 is arranged on the outside of the second filter sleeve 25, and the first filter sleeve 26 is installed on the surface of the fixed tube 23.

[0032] In this embodiment: by setting the filter assembly 2, when in use, by setting a fixed tube 23 inside the filter tube 11, and installing an oil inlet pipe 24 on the surface of the fixed tube 23, the hydraulic oil is discharged into the filter tube 11 through the return oil pipe 1, and by respectively arranging a second filter sleeve 25 and a first filter sleeve 26 on the surface of the oil inlet pipe 24 to perform multi-layer filtration on impurities in the hydraulic oil, the impurities and pollutants in the return oil can be effectively filtered, the components and oil quality of the hydraulic system can be protected, the service life of the grab equipment can be increased, the failure and maintenance costs can be reduced, and the mechanical equipment has more sufficient and stable hydraulic power.

[0033] It should be noted that: a plurality of oil seepage holes arranged at equal intervals are provided on the surface of the oil inlet pipe 24 .

[0034] In an optional embodiment, the first filter sleeve 26 is made of a metal fiber filter element material, and the second filter sleeve 25 is made of a variety of filter membrane materials.

[0035] In this embodiment: the first filter sleeve 26 is made of metal fiber filter element material, which has high strength, high adhesion and high temperature resistance, can filter tiny particles, and is suitable for high-pressure and high-temperature hydraulic systems. The second filter sleeve 25 is composed of a variety of filter membrane materials, has high-precision filtering performance, can filter tiny particles and microorganisms, is suitable for high-cleanliness liquid filtration, and has a good purification and filtration effect.

[0036] In an optional embodiment, a screw block 21 is installed at one end of the oil outlet pipe 12, a threaded groove 22 is opened on the inner wall surface of the filter tube 11, the screw block 21 is screwed into the filter tube 11 through the threaded groove 22, and the fixing tube 23 is screwed into the threaded hole opened on the surface of the screw block 21.

[0037] In this embodiment: by installing a screw block 21 at one end of the oil outlet pipe 12 and opening a threaded groove 22 on the inner wall surface of the filter tube 11, the oil outlet pipe 12 and the filter tube 11 are combined to achieve detachability, which is convenient for cleaning the impurities after filtering inside the filter tube 11, making it more convenient to use and more convenient to replace the second filter sleeve 25 and the first filter sleeve 26.

[0038] Going further:

[0039] like Figure 1 and Figure 4 As shown;

[0040] In combination with the above content, it also includes a disassembly component 3 installed at one end of the return oil pipe 1, the disassembly component 3 includes a flange a31 installed at one end of the return oil pipe 1, a flange b32 installed at one end of the filter tube 11, and four hydraulic cylinders 33 installed on one side surface of the flange a31, and the protruding ends of the hydraulic cylinders 33 are all equipped with fixing rods 34, the fixing rods 34 all penetrate the flange b32, and are threadedly connected with nuts 35 arranged on one side of the flange b32.

[0041] In this embodiment: and in conjunction with the disassembly component 3, when in use, the flange a31 and the flange b32 are respectively installed at one end of the return oil pipe 1 and the filter tube 11, and the fixing rod 34 is inserted into the insertion hole opened on the surface of the flange b32, and the nut 35 is rotated on one end of the fixing rod 34, and the flange b32 is fitted to the surface of the flange a31 by starting the hydraulic cylinder 33, so as to realize the installation and disassembly of the filter tube 11, facilitate the cleaning of the inside of the filter tube 11, and the use effect is good.

[0042] In an optional embodiment, sealing gaskets are installed on the surfaces of the flange a31 and the flange b32 that are close to each other.

[0043] In this embodiment, by arranging sealing gaskets on the surfaces of flange a31 and flange b32, leakage of hydraulic oil can be effectively prevented, and the sealing effect is good.

[0044] The working principle and use process of the utility model are as follows: by setting a filter component 2, when in use, by setting a fixed tube 23 inside the filter tube 11, and installing an oil inlet pipe 24 on the surface of the fixed tube 23, the hydraulic oil is discharged into the filter tube 11 through the return oil pipe 1, and by respectively sleeved a second filter sleeve 25 and a first filter sleeve 26 on the surface of the oil inlet pipe 24 to perform multi-layer filtration on impurities in the hydraulic oil, the impurities and pollutants in the return oil can be effectively filtered, the components and oil quality of the hydraulic system can be protected, the service life of the grab equipment can be increased, the failure and maintenance costs can be reduced, and the mechanical equipment can have more sufficient and stable hydraulic power. The first filter sleeve 26 is made of metal fiber filter element material, which has high strength, high adhesion and high temperature resistance, can filter tiny particles, and is suitable for high-pressure and high-temperature hydraulic systems. The second filter sleeve 25 is composed of a variety of filter membrane materials, has high-precision filtering performance, can filter tiny particles and microorganisms, and is suitable for high-cleanliness liquid filtration, purification process The filtering effect is good. By installing a screw block 21 at one end of the oil outlet pipe 12 and opening a threaded groove 22 on the inner wall surface of the filter tube 11, the oil outlet pipe 12 and the filter tube 11 are combined to achieve detachability, which is convenient for cleaning the impurities after filtering inside the filter tube 11, and the use is more convenient. It is more convenient to replace the second filter sleeve 25 and the first filter sleeve 26, and cooperate with the disassembly component 3. When in use, the flange a31 and the flange b32 are respectively installed on one end of the return oil pipe 1 and the filter tube 11, and after the fixing rod 34 is inserted into the jack opened on the surface of the flange b32, the nut 35 is rotated on one end of the fixing rod 34, and the flange b32 is fitted to the surface of the flange a31 by starting the hydraulic cylinder 33, so as to realize the installation and disassembly of the filter tube 11, which is convenient for cleaning the inside of the filter tube 11, and the use effect is good. By arranging sealing gaskets on the surfaces of the flange a31 and the flange b32, hydraulic oil leakage can be effectively prevented, and the sealing effect is good.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A hydraulic grab bucket oil return pipe filtering device, comprising an oil return pipe (1), a filtering pipe (11) arranged at one end of the oil return pipe (1), and an oil outlet pipe (12) arranged at an end of the filtering pipe (11) away from the oil return pipe (1), characterized in that: It also includes a filter assembly (2) arranged in the filter tube (11); The filter assembly (2) comprises a fixed tube (23) arranged in the filter tube (11), an oil inlet tube (24) installed at one end of the fixed tube (23), and a second filter sleeve (25) installed on the surface of the fixed tube (23), the second filter sleeve (25) being sleeved on the outer surface of the oil inlet tube (24), a first filter sleeve (26) being arranged outside the second filter sleeve (25), and the first filter sleeve (26) being installed on the surface of the fixed tube (23).

2. The hydraulic grab bucket oil return pipe filtering device according to claim 1 is characterized in that: The first filter sleeve (26) is made of a metal fiber filter element material, and the second filter sleeve (25) is made of a variety of filter membrane materials.

3. The hydraulic grab bucket oil return pipe filtering device according to claim 1 is characterized in that: The surface of the oil inlet pipe (24) is provided with a plurality of oil seepage holes arranged at equal distances.

4. The hydraulic grab bucket oil return pipe filtering device according to claim 1, characterized in that: A screw block (21) is installed at one end of the oil outlet pipe (12), a thread groove (22) is provided on the inner wall surface of the filter tube (11), the screw block (21) is screwed into the filter tube (11) through the thread groove (22), and the fixing tube (23) is screwed into the threaded hole provided on the surface of the screw block (21).

5. The hydraulic grab bucket oil return pipe filtering device according to claim 1 is characterized in that: It also includes a disassembly assembly (3) installed at one end of the oil return pipe (1), the disassembly assembly (3) including a flange a (31) installed at one end of the oil return pipe (1), a flange b (32) installed at one end of the filter pipe (11), and four hydraulic cylinders (33) installed on one side surface of the flange a (31), the protruding ends of the hydraulic cylinders (33) are all installed with fixing rods (34), the fixing rods (34) all pass through the flange b (32) and are threadedly connected to nuts (35) arranged on one side of the flange b (32).

6. The hydraulic grab bucket oil return pipe filtering device according to claim 5, characterized in that: Sealing gaskets are installed on the surfaces of the flange a (31) and the flange b (32) that are close to each other.

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