Filtering device for hydraulic system

Abstract

The utility model discloses a filtering device for a hydraulic system, which comprises a mounting seat and two filter cartridges, a plurality of fixing lugs are fixedly mounted on the outer wall of the mounting seat, two clamping mechanisms for the filter cartridges are mounted on the mounting seat, a top cover is detachably and hermetically connected to an opening at the top end of each filter cartridge, a liquid inlet is arranged on the top cover, and a liquid outlet is arranged on the liquid inlet. A filter mechanism is mounted in the filter cartridge, a liquid outlet is formed in the bottom of the filter cartridge, and the liquid inlet and the liquid outlet are located in the inner side and the outer side of the filter mechanism respectively; according to the utility model, when the filter mechanism in a certain filter cartridge needs to be maintained, the filter cartridge can be taken down only by closing the valve corresponding to the filter cartridge, disassembling the corresponding movable joint, operating the clamping mechanism and releasing the filter cartridge from the mounting seat, so that the operation is simple and convenient, and the maintenance is convenient. And the other filter cartridge can still play a role in filtering the hydraulic system after being detached, so that the operation of the hydraulic system does not need to be stopped, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, in particular to a filtering device for hydraulic systems. Background Art

[0002] Construction machinery usually uses hydraulic systems to drive working devices to perform corresponding actions. The hydraulic system converts hydraulic energy into mechanical energy by circulating hydraulic oil in pipelines.

[0003] During the operation of the hydraulic system, the hydraulic oil will bring some particulate pollutants into the hydraulic oil pipes, which will gradually accumulate and cause blockage of the channels and even cause failure of the hydraulic system.

[0004] Therefore, hydraulic systems usually have filters to filter the return oil to ensure the cleanliness of the hydraulic oil. However, most of the current hydraulic system filter devices are located in the hydraulic oil tank. The hydraulic oil is filtered through the partition plate in the oil tank and the filter element at the oil inlet end of the oil outlet pipe. Although it has a certain filtering effect, it is troublesome to install and disassemble, not easy to maintain, and requires stopping the operation of the hydraulic system, which needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a filter device for a hydraulic system to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A filtering device for a hydraulic system comprises a mounting seat and two filter cartridges, a plurality of fixing ears being fixedly mounted on the outer wall of the mounting seat, two clamping mechanisms for the filter cartridges being mounted on the mounting seat, a top cover being detachably sealed and connected to the top opening of the filter cartridge, a liquid inlet being arranged on the top cover, a filtering mechanism being mounted in the filter cartridge, a liquid outlet being arranged at the bottom of the filter cartridge, and the liquid inlet and the liquid outlet being respectively located at the inner and outer sides of the filtering mechanism, the two liquid inlets being connected to a first shunt pipe via a movable joint, the liquid inlet ends of the two first shunt pipes being connected to the liquid inlet pipe via a tee, the two liquid outlets being connected to a second shunt pipe via a movable joint, the liquid outlet ends of the two second shunt pipes being connected to the liquid outlet pipe via a tee, and valves being mounted on the first shunt pipe and the second shunt pipe.

[0008] As a further solution of the utility model: the bottom inner wall of the filter cartridge is fixedly connected with an annular boss, the liquid outlet is located on the outside of the annular boss, the filtering mechanism includes a plurality of coaxially arranged tubular filter screens, the filter holes of the plurality of tubular filter screens increase in diameter from the inside to the outside, the tubular filter screens are located between the annular boss and the top cover, the top of the annular boss and the bottom of the top cover are both provided with a plurality of annular grooves, and both ends of the tubular filter screen are located in the corresponding annular grooves.

[0009] As a further solution of the utility model: a sewage pipe is arranged at the bottom of the filter cartridge, the sewage pipe is communicated with the central hole of the annular boss, and a plugging cover is detachably connected to the bottom end of the sewage pipe.

[0010] As a further solution of the utility model: the clamping mechanism includes a bidirectional screw rotatably installed in a mounting seat, the outer wall of the bidirectional screw is cooperatively sleeved with two nuts, one end of the bidirectional screw is fixedly connected with a handwheel after passing through the mounting seat, and sliding grooves are provided at the corresponding parts of the outer wall of the mounting seat and the bidirectional screw, and two sliders are slidably connected in the sliding grooves, one end of the slider located in the mounting seat is fixedly connected to the corresponding nut, and the end of the slider located outside the mounting seat is fixedly connected to a clamping block.

[0011] As a further solution of the utility model: the outer walls of the clamping blocks are provided with arc-shaped grooves adapted to the outer diameter of the filter cartridge, the outer walls of the filter cartridge are fixedly connected to two positioning rings, the filter cartridge is located between the corresponding two positioning rings, and the spacing between the two positioning rings is adapted to the thickness of the filter cartridge.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] When the utility model is in use, the oil outlet pipeline of the hydraulic actuator is connected with the liquid inlet pipe, and the liquid outlet pipe is connected with the oil return pipeline of the hydraulic oil tank, and each valve is opened. During the operation of the hydraulic system, the hydraulic oil discharged by the hydraulic actuator will enter the filter cartridge, and after being filtered by the filter mechanism, it will be discharged into the hydraulic oil tank through the liquid outlet pipe, so that the hydraulic oil is effectively filtered, thereby reducing the blockage and failure of the hydraulic system. When it is necessary to maintain the filter mechanism in a certain filter cartridge, it is only necessary to close the valve corresponding to the filter cartridge, then disassemble the corresponding movable joint, and operate the clamping mechanism to release the filter cartridge from the mounting seat, so that the filter cartridge can be removed. The operation is simple and convenient, and the other removed filter cartridge can still have a filtering effect on the hydraulic system, so there is no need to stop the operation of the hydraulic system, and the use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the structure of a filtering device for a hydraulic system.

[0015] Figure 2 The present invention is a schematic diagram of the internal structure of a filter cartridge in a filter device for a hydraulic system.

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0017] Figure 4 The present invention is a schematic diagram of the internal structure of a mounting seat in a filter device for a hydraulic system.

[0018] Among them, there are mounting seat 1, bidirectional screw 2, hand wheel 3, nut 4, slide groove 5, slider 6, clamping block 7, fixing ear 8, filter cartridge 9, positioning ring 10, top cover 11, liquid inlet 12, annular boss 13, tubular filter 14, annular groove 15, liquid outlet 16, drain pipe 17, plugging cover 18, first diversion pipe 19, liquid inlet pipe 20, second diversion pipe 21, liquid outlet pipe 22, and valve 23. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail in conjunction with the embodiments below. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation in the specification, and therefore cannot be understood as a limitation on the present invention.

[0022] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0023] See also Figures 1 to 4In an embodiment of the utility model, a filter device for a hydraulic system comprises a mounting seat 1 and two filter cartridges 9, wherein a plurality of fixing ears 8 are fixedly mounted on the outer wall of the mounting seat 1, and two clamping mechanisms for the filter cartridges 9 are mounted on the mounting seat 1, and a top cover 11 is detachably sealed and connected at the top opening of the filter cartridge 9 by a flange connection or a threaded connection, and a liquid inlet 12 is arranged on the top cover 11, and a filter mechanism is mounted in the filter cartridge 9, and a liquid outlet 16 is arranged at the bottom of the filter cartridge 9, and the liquid inlet 12 and the liquid outlet 16 are respectively located at the inner and outer sides of the filter mechanism, and the two liquid inlets 12 are connected to a first shunt pipe 19 through a movable joint, and the liquid inlet ends of the two first shunt pipes 19 are connected to a liquid inlet pipe 20 through a tee, and the two liquid outlets 16 are connected to a second shunt pipe 21 through a movable joint, and the liquid outlet ends of the two second shunt pipes 21 are connected to a liquid outlet pipe 22 through a tee, and valves 23 are installed on the first shunt pipe 19 and the second shunt pipe 21.

[0024] The utility model adopts the above scheme. When in use, the oil outlet pipeline of the hydraulic actuator is connected with the liquid inlet pipe 20, and the liquid outlet pipe 22 is connected with the oil return pipeline of the hydraulic oil tank, and each valve 23 is opened. During the operation of the hydraulic system, the hydraulic oil discharged by the hydraulic actuator will enter the filter cartridge 9, and after being filtered by the filtering mechanism, it will be discharged into the hydraulic oil tank through the liquid outlet pipe 22, so that the hydraulic oil is effectively filtered, thereby reducing the blockage and failure of the hydraulic system. When it is necessary to maintain the filtering mechanism in a certain filter cartridge 9, it is only necessary to close the valve 23 corresponding to the filter cartridge 9, then disassemble the corresponding movable joint, and operate the clamping mechanism to release the filter cartridge 9 from the mounting seat 1, so that the filter cartridge 9 can be removed. The operation is simple and convenient, and the other removed filter cartridge 9 can still have a filtering effect on the hydraulic system. Therefore, there is no need to stop the operation of the hydraulic system, and the use effect is good.

[0025] Specific combination Figure 2 In one embodiment of the utility model, the bottom inner wall of the filter cartridge 9 is fixedly connected with an annular boss 13, the liquid outlet 16 is located on the outside of the annular boss 13, the filtering mechanism includes a plurality of coaxially arranged tubular filter screens 14, the filter holes of the plurality of tubular filter screens 14 increase in diameter from the inside to the outside, the tubular filter screens 14 are located between the annular boss 13 and the top cover 11, the top of the annular boss 13 and the bottom of the top cover 11 are both provided with a plurality of annular grooves 15, and both ends of the tubular filter screen 14 are located in the corresponding annular grooves 15.

[0026] The hydraulic oil entering the filter cartridge 9 from the liquid inlet 12 will be directly discharged into the innermost tubular filter 14, and will be discharged from the liquid outlet 16 after being filtered by multiple tubular filter screens 14, thereby filtering the hydraulic oil multiple times to ensure the filtering effect. The arrangement of multiple annular grooves 15 can position the tubular filter screen 14 in the filter cartridge 9, thereby facilitating the positioning and installation of the tubular filter screen 14.

[0027] Specific combination Figure 1 and Figure 2 In one embodiment of the utility model, a drain pipe 17 is provided at the bottom of the filter cartridge 9, the drain pipe 17 is connected to the center hole of the annular boss 13, and a plug cover 18 is detachably connected to the bottom end of the drain pipe 17.

[0028] By setting the drain pipe 17 and the plugging cover 18, when performing temporary maintenance on a filter cartridge 9, after closing the corresponding valve 23 and removing the plugging cover 18, the impurities intercepted by the tubular filter 14 in the filter cartridge 9 together with part of the hydraulic oil can be discharged from the drain pipe 17, which is simple and convenient to operate.

[0029] Specific combination Figure 1 and Figure 4 In one embodiment of the utility model, the clamping mechanism includes a bidirectional screw 2 rotatably installed in a mounting seat 1, the outer wall of the bidirectional screw 2 is fitted with two nuts 4, one end of the bidirectional screw 2 passes through the mounting seat 1 and is fixedly connected to a handwheel 3, a slide groove 5 is provided at the corresponding positions of the outer wall of the mounting seat 1 and the bidirectional screw 2, two sliders 6 are slidably connected in the slide groove 5, one end of the slider 6 located in the mounting seat 1 is fixedly connected to the corresponding nut 4, and one end of the slider 6 located outside the mounting seat 1 is fixedly connected to a clamping block 7.

[0030] By driving the bidirectional screw 2 to rotate through the hand wheel 3, the two sliders 6 can be driven to move in the same direction in the slide groove 5 by the cooperation of the bidirectional screw 2 and the two nuts 4, so as to adjust the distance between the two clamping blocks 7 to clamp or release the filter cartridge 9, which is simple and convenient to operate.

[0031] Specific combination Figure 1 and Figure 4 On the basis of the previous embodiment, further, the outer wall of the clamping block 7 is provided with an arc-shaped groove adapted to the outer diameter of the filter cartridge 9, and the outer wall of the filter cartridge 9 is fixedly connected to two positioning rings 10, and the filter cartridge 9 is located between the two corresponding positioning rings 10, and the spacing between the two positioning rings 10 is adapted to the thickness of the filter cartridge 9.

[0032] By setting the arc-shaped groove, the clamping block 7 and the filter cartridge 9 can fit more closely, thereby improving the clamping and positioning effect of the filter cartridge 9. By cooperating with the two positioning rings 10 and the clamping block 7, the filter cartridge 9 can be prevented from moving between the two clamping blocks 7.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A filter device for a hydraulic system, characterized in that: The invention comprises a mounting seat (1) and two filter cartridges (9), wherein a plurality of fixing ears (8) are fixedly mounted on the outer wall of the mounting seat (1), two clamping mechanisms for the filter cartridges (9) are mounted on the mounting seat (1), a top cover (11) is detachably sealed and connected to the top opening of the filter cartridge (9), a liquid inlet (12) is arranged on the top cover (11), a filtering mechanism is mounted inside the filter cartridge (9), a liquid outlet (16) is arranged at the bottom of the filter cartridge (9), and the liquid inlet (12) and the liquid outlet (16) are respectively located at On both sides of the inner and outer sides of the filtering mechanism, the two liquid inlets (12) are connected to a first shunt pipe (19) via a movable joint, the liquid inlet ends of the two first shunt pipes (19) are connected to a liquid inlet pipe (20) via a tee, the two liquid outlets (16) are connected to a second shunt pipe (21) via a movable joint, the liquid outlet ends of the two second shunt pipes (21) are connected to a liquid outlet pipe (22) via a tee, and valves (23) are installed on the first shunt pipe (19) and the second shunt pipe (21).

2. A filter device for a hydraulic system according to claim 1, characterized in that: The bottom inner wall of the filter cartridge (9) is fixedly connected with an annular boss (13), the liquid outlet (16) is located on the outside of the annular boss (13), the filtering mechanism comprises a plurality of coaxially arranged tubular filter screens (14), the filter holes of the plurality of tubular filter screens (14) increase in diameter from the inside to the outside, the tubular filter screens (14) are located between the annular boss (13) and the top cover (11), the top of the annular boss (13) and the bottom of the top cover (11) are both provided with a plurality of annular grooves (15), and both ends of the tubular filter screen (14) are located in the corresponding annular grooves (15).

3. A filter device for a hydraulic system according to claim 2, characterized in that: A sewage discharge pipe (17) is provided at the bottom of the filter cartridge (9), the sewage discharge pipe (17) is communicated with the central hole of the annular boss (13), and a plugging cover (18) is detachably connected to the bottom end of the sewage discharge pipe (17).

4. A filter device for a hydraulic system according to claim 1, characterized in that: The clamping mechanism comprises a bidirectional screw (2) rotatably mounted in a mounting seat (1), the outer wall of the bidirectional screw (2) being sleeved with two nuts (4), one end of the bidirectional screw (2) passing through the mounting seat (1) and fixedly connected with a hand wheel (3), a sliding groove (5) being provided at the corresponding positions of the outer wall of the mounting seat (1) and the bidirectional screw (2), two sliding blocks (6) being slidably connected in the sliding groove (5), one end of the sliding block (6) located in the mounting seat (1) being fixedly connected with the corresponding nut (4), and one end of the sliding block (6) located outside the mounting seat (1) being fixedly connected with a clamping block (7).

5. A filter device for a hydraulic system according to claim 4, characterized in that: The outer wall of the clamping block (7) is provided with an arc-shaped groove matching the outer diameter of the filter cartridge (9), and the outer wall of the filter cartridge (9) is fixedly connected with two positioning rings (10). The filter cartridge (9) is located between the two corresponding positioning rings (10), and the spacing between the two positioning rings (10) is matched with the thickness of the filter cartridge (9).

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