Return oil filtering device of hydraulic station

Abstract

The utility model provides a hydraulic station return oil filtering device which comprises a tank body, a filter element is arranged in the tank body, an oil outlet pipe is fixedly connected to the middle of the lower end of the tank body, the oil outlet pipe upwards penetrates through and extends into the filter element, a return pipe is fixedly connected to the side wall of the tank body, a filter screen is arranged in the return pipe, and the filter screen is fixedly connected to the side wall of the tank body. The lower end of the return pipe is fixedly connected with a three-way pipe, the lower end of the three-way pipe is fixedly connected with a settling tank, and a pipe opening in the side wall of the three-way pipe is connected with an oil return pipeline. The filter has the advantages that two filters are arranged, the filter element is protected by the filter screen, and the filter burden is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of filtration, in particular to a hydraulic station oil return filtering device. BACKGROUND

[0002] The hydraulic oil filter is a device for filtering solid impurities in the hydraulic system. The quality of hydraulic oil has a great influence on the working performance of the hydraulic system, and many faults are caused by it. Preventing oil pollution can install hydraulic oil filters in appropriate places to intercept pollutants in the oil, keep the oil clean, and ensure the normal operation of the oil system. In the hydraulic system, filters can be installed in the oil suction path, pressure oil path and oil return path as needed, or installed outside the main system to form a separate filtering system.

[0003] In the oil return path, most of the time, the filter core is directly filtered through the filter core. The debris generated by the friction of the hydraulic equipment in operation, and the oil sludge that may exist in the oil return pipeline, are extremely easy to cause the filter core to be blocked, and in severe cases, to be damaged. SUMMARY

[0004] To solve the above problems, the present application discloses a hydraulic station oil return filtering device, which comprises a tank body, a filter core is arranged in the tank body, an oil outlet pipe is fixedly connected to the middle of the lower end of the tank body, and the oil outlet pipe penetrates upward and extends into the inside of the filter core, a return pipe is fixedly connected to the side wall of the tank body, a filter screen is arranged in the return pipe, a three-way pipe is fixedly connected to the lower end of the return pipe, a sediment tank is fixedly connected to the lower end of the three-way pipe, and the side wall pipe opening of the three-way pipe is connected with an oil return pipeline. Further, the filter screen is a steel mesh made of fine steel wire by weaving, so that the filter screen can be used for a lifetime without replacement, and can be cleaned regularly. The filter screen is used to intercept larger particulate impurities, and the intercepted impurities finally fall into the sediment tank, which can be cleaned by rotating the sediment tank. By intercepting larger impurities, the filtering burden of the filter core is reduced, and damage to the filter core caused by vibration and impact of hydraulic oil is avoided.

[0005] Preferably, a first sealing gasket is arranged at the lower end of the filter core. That is, the hydraulic oil enters the inside of the filter core from the outside, and then is sent out from the oil outlet pipe. The first sealing gasket is arranged to block the inside and outside of the filter core.

[0006] Preferably, a support ring is threadedly connected to the inner wall of the upper part of the tank body, an L-shaped clamping groove is arranged on the inner wall of the support ring, the upper end of the filter core is sealed, a clamping rod is fixedly connected to the edge of the filter core, and the end of the clamping rod extends into the inside of the L-shaped clamping groove. The clamping rod and the L-shaped clamping groove are used to support and fix the filter core.

[0007] Preferably, the upper end of the tank body is provided with a flange blind plate, and the edge of the flange blind plate is provided with a bolt nut. The flange blind plate seals the upper end of the tank body, and the bolt nut fixes the flange blind plate on the upper end of the tank body.

[0008] Preferably, the upper end of the tank body is provided with a second sealing ring, and the upper end of the second sealing ring is in contact with the flange blind plate. The second sealing ring ensures the sealing between the flange blind plate and the tank body.

[0009] Preferably, the side wall of the tank body is fixedly connected with a mounting seat, the mounting seat is L-shaped in cross section, one side of the mounting seat is provided with a mounting hole, and the mounting seat is provided with two mounting seats, and the return pipe is located between the two mounting seats. The mounting seat is convenient for fixing the cover device on the support of the hydraulic oil tank or the vicinity. The return pipe is arranged between the two mounting seats, and the overall appearance of the device is improved.

[0010] The beneficial effects of the present application are as follows:

[0011] 1. The three-way pipe, filter screen and sediment tank are arranged on the oil return pipe, the returned hydraulic oil is preliminarily filtered, the larger impurities are intercepted, and the filtering pressure of the filter element is reduced.

[0012] 2. The supporting ring, L-shaped clamping groove and clamping rod are arranged, so that the installation and fixation of the filter element are simple and fast. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a perspective view of the present application;

[0014] Figure 2 is a sectional view of the present application;

[0015] Figure 3 is a partial view of the upper end of the filter element of the present application;

[0016] Figure 4 is Figure 2 is an enlarged view of A in FIG. 4.

[0017] LIST OF REFERENCE NUMBERS:

[0018] 1. Sediment tank; 2. Three-way pipe; 3. Tank body; 4. Return pipe; 5. Mounting seat; 6. Flange blind plate; 7. Oil outlet pipe; 8. First sealing gasket; 9. Filter element; 10. Filter screen; 11. Clamping rod; 12. L-shaped clamping groove; 13. Supporting ring; 14. Second sealing ring; 15. Bolt nut. DETAILED DESCRIPTION

[0019] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0020] like Figures 1 to 4 As shown, a hydraulic station return oil filtration device includes a cylindrical tank 3. A filter element 9 is installed inside the tank 3. The filter element 9 consists of common components, including filter paper and a support frame, which will not be described in detail here. An oil outlet pipe 7 is fixedly connected to the lower middle part of the tank 3 to deliver the filtered hydraulic oil. The oil outlet pipe 7 extends upwards through and into the interior of the filter element 9. This means that the hydraulic oil is filtered as it enters the interior from the outside of the filter element 9. A return pipe 4 is fixedly connected to the side wall of the tank 3 to return the hydraulic oil. Pressurized oil enters the interior of tank 3 through return pipe 4. A filter screen 10, which is made of steel wire mesh, is installed inside the return pipe 4 to filter larger impurities and reduce the filtration burden on filter element 9. A three-way pipe 2 is fixedly connected to the lower end of the return pipe 4, and a sedimentation tank 1 is fixedly connected to the lower end of the three-way pipe 2. Impurities are trapped by the filter screen 10 and fall into the sedimentation tank 1 under the action of gravity. The sedimentation tank 1 is rotated to clean the impurities inside. The side wall port of the three-way pipe 2 is connected to the oil return pipeline.

[0021] A first sealing gasket 8 is provided at the lower end of the filter element 9. By providing the first sealing gasket 8, hydraulic oil is prevented from directly leaking into the interior of the filter element 9, and the first sealing gasket 8 is elastic.

[0022] A support ring 13 is threadedly connected to the upper inner wall of the tank body 3. The height of the support ring 13 in the tank body 3 can be adjusted by rotation as needed. An L-shaped groove 12 is provided on the inner wall of the support ring 13. The upper end of the filter element 9 is sealed and a locking rod 11 is fixedly connected to its edge. The end of the locking rod 11 extends into the interior of the L-shaped groove 12. Through the L-shaped groove 12 and the locking rod 11, the filter element 9 is fixed inside the tank body 3. After the filter element 9 is installed, the filter element 9 and the support ring 13 are rotated as a whole, so that the filter element 9 presses down on the first sealing gasket, which greatly improves the sealing effect.

[0023] A flange blind plate 6 is provided at the upper end of the tank body 3. The flange blind plate 6 is used to seal the upper end of the tank body 3. When the filter element 9 needs to be replaced, the flange blind plate 6 can be removed first. Bolts and nuts 15 are provided on the edge of the flange blind plate 6. The flange blind plate 6 is fixedly connected to the upper end of the tank body 3 by bolts and nuts 15.

[0024] A second sealing ring 14 is provided at the upper end of the tank body 3. The upper end of the second sealing ring 14 contacts the flange blind plate 6. The second sealing ring 14 achieves the seal between the tank body 3 and the flange blind plate 6. At the same time, a groove is provided in the flange blind plate 6 to accommodate the second sealing ring 14 and to limit its movement.

[0025] The side wall of the tank body 3 is fixedly connected to the mounting base 5. The cross-sectional shape of the mounting base 5 is L-shaped, and one side is provided with a mounting hole, which is also elongated. There are two mounting bases 5. The device is installed and fixed on the hydraulic oil tank or nearby support through the mounting base 5. The return pipe 4 is located between the two mounting bases 5. This setting improves the overall sealing of the device.

[0026] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A hydraulic station return oil filtration device, comprising a tank (3), wherein a filter element (9) is disposed inside the tank (3), and an oil outlet pipe (7) is fixedly connected to the lower middle part of the tank (3), and the oil outlet pipe (7) extends upward through and into the interior of the filter element (9), characterized in that: The side wall of the tank (3) is fixedly connected to a return pipe (4), and a filter screen (10) is installed inside the return pipe (4). The lower end of the return pipe (4) is fixedly connected to a three-way pipe (2), and the lower end of the three-way pipe (2) is fixedly connected to a sedimentation tank (1). The side wall port of the three-way pipe (2) is connected to a return oil pipeline.

2. The hydraulic station return oil filtration device according to claim 1, characterized in that: The lower end of the filter element (9) is provided with a first sealing gasket (8).

3. The hydraulic station return oil filtration device according to claim 1, characterized in that: The upper inner wall of the tank (3) is threaded with a support ring (13), and the inner wall of the support ring (13) is provided with an L-shaped groove (12). The upper end of the filter element (9) is sealed, and a clamping rod (11) is fixedly connected to its edge. The end of the clamping rod (11) extends into the interior of the L-shaped groove (12).

4. The hydraulic station return oil filtration device according to claim 1, characterized in that: The upper end of the tank body (3) is provided with a flange blind plate (6), and the edge of the flange blind plate (6) is provided with bolts and nuts (15).

5. A hydraulic station return oil filtration device according to claim 4, characterized in that: The upper end of the tank body (3) is provided with a second sealing ring (14), and the upper end of the second sealing ring (14) is in contact with the flange blind plate (6).

6. The hydraulic station return oil filtration device according to claim 1, characterized in that: The tank body (3) is fixedly connected to a mounting base (5). The mounting base (5) has an L-shaped cross section and a mounting hole on one side. The mounting base (5) has two mounting holes, and the return pipe (4) is located between the two mounting bases (5).

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