Hydraulic oil filtering device connected with servo valve

Abstract

The utility model relates to the technical field of hydraulic oil filtering, and discloses a hydraulic oil filtering device connected with a servo valve, which comprises a filtering box and a filtering cavity, a sealing cover is arranged at the upper end of the filtering box, two groups of filtering components are arranged at one end in the filtering cavity, a buffer mechanism is arranged at one end of each filtering component, and the mounting direction of the buffer mechanism is perpendicular to the flowing direction of hydraulic oil; the buffer mechanism comprises a fixing frame, the fixing frame is fixedly connected with the filter box, a fixing seat is arranged at one end of the fixing frame and fixedly connected with the filter box, a push rod is arranged at one end of the fixing frame, a movable plate is arranged in the fixing seat, one end of the movable plate is fixedly connected with the push rod, buffer strips are arranged on the two sides of the movable plate, and a telescopic spring is arranged on the outer side of the push rod. And the telescopic spring sleeves the outer side of the push rod. According to the utility model, the buffer mechanism is arranged, so that the flowing speed of hydraulic oil can be effectively reduced, the hydraulic oil is prevented from impacting and damaging the filter screen in the flowing process, and the service life of the filter screen can be effectively prolonged.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic oil filtration technology, and in particular to a hydraulic oil filtration device connected to a servo valve. Background Technology

[0002] A servo valve is a control valve used for precise control of the flow and pressure of liquids or gases, and is widely used in hydraulic or pneumatic systems. It adjusts the output flow or pressure by receiving an input control signal (usually an electrical signal) to achieve precise control. The hydraulic oil filter of a servo valve is a device used to clean the hydraulic oil, ensuring that it does not contain excessive impurities and contaminants, thus guaranteeing the normal operation of the servo valve and other hydraulic components.

[0003] Existing hydraulic oil filtering devices for servo valves have drawbacks. During operation, when hydraulic oil flows into the filter, the high flow rate causes it to impact the filter screen, which can easily damage the screen and affect the lifespan of the filter. To address this, we propose a hydraulic oil filtering device that connects to the servo valve. Utility Model Content

[0004] The main objective of this invention is to provide a hydraulic oil filtration device for connecting a servo valve, which can effectively solve the technical problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a hydraulic oil filtration device for connecting a servo valve, comprising a filter box, a filter chamber inside the filter box, an oil outlet pipe at one end of the filter box, an oil inlet pipe at the other end of the filter box, a sealing cover at the top of the filter box, a sealing bolt on the outside of the sealing cover, two sets of filter components at one end of the filter chamber, a buffer mechanism at one end of the filter components, the buffer mechanism being installed perpendicular to the hydraulic oil flow direction; the buffer mechanism includes a fixed frame, the fixed frame being fixedly connected to the filter box, a fixed seat at one end of the fixed frame being fixedly connected to the filter box, a push rod at one end of the fixed frame, a movable plate inside the fixed seat, the movable plate being installed perpendicular to the hydraulic oil flow direction, a fixed connection at one end of the movable plate to the push rod, buffer strips on both sides of the movable plate, and a telescopic spring on the outside of the push rod, the telescopic spring being sleeved on the outside of the push rod.

[0006] Preferably, the buffer strip is an elastic rubber strip with a U-shaped bend, and the bend opening of the buffer strip faces the oil inlet pipe.

[0007] Preferably, the buffer strip has an oil passage hole inside, which is a through hole.

[0008] Preferably, the push rod is a rigid metal rod, the push rod is installed perpendicular to the fixed frame, and the push rod is slidably connected to the fixed frame.

[0009] Preferably, a limiting plate is provided at one end of the push rod, the diameter of which is larger than that of the push rod, and one end of the limiting plate is fixedly connected to the push rod.

[0010] Preferably, the filter assembly includes two sets of clamping seats, one end of which is fixedly connected to the filter box, and a filter screen is provided between the two sets of clamping seats.

[0011] Preferably, a sealing strip is provided at the lower end of the filter screen. The sealing strip is a soft rubber strip, with the upper end of the sealing strip connected to the filter screen and the lower end of the sealing strip in contact with the filter chamber.

[0012] This utility model provides a hydraulic oil filtering device for connecting to a servo valve, which has the following advantages:

[0013] 1. A hydraulic oil filtration device connected to a servo valve, which, by setting a buffer mechanism, can effectively reduce the flow speed of hydraulic oil, avoid impact damage to the filter screen during the flow of hydraulic oil, and effectively extend the service life of the filter screen.

[0014] 2. A hydraulic oil filtration device connected to a servo valve, which improves the filtration effect of the filter screen and the bottom surface of the filter chamber by setting a sealing strip to prevent hydraulic oil leakage. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the filter box of this utility model;

[0018] Figure 3 This is a schematic diagram of the filter assembly structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the buffer mechanism of this utility model.

[0020] Legend:

[0021] 1. Filter box; 2. Filter chamber; 3. Oil outlet pipe; 4. Oil inlet pipe; 5. Sealing cover; 6. Sealing bolt; 7. Filter assembly; 8. Buffer mechanism; 9. Clamping seat; 10. Filter screen; 11. Sealing strip; 12. Fixing frame; 13. Fixing base; 14. Push rod; 15. Moving plate; 16. Buffer strip; 17. Oil passage hole; 18. Telescopic spring; 19. Limiting plate. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Example: A hydraulic oil filtering device connected to a servo valve, such as... Figure 1 - Figure 4 As shown, the system includes a filter box 1, which is a hollow shell with an opening at the top. A filter chamber 2 is located inside the filter box 1. An oil outlet pipe 3 is located at one end of the filter box 1, and one end of the oil outlet pipe 3 is fixedly connected to the filter box 1, communicating with the interior of the filter box 1. An oil inlet pipe 4 is located at the end of the filter box 1 away from the oil outlet pipe 3, and the oil inlet pipe 4 is fixedly connected to the filter box 1, communicating with the internal cavity of the filter box 1. A sealing cover 5 is located at the top of the filter box 1. The sealing cover 5 is a rigid rectangular plate, and its lower end is adapted to the shape of the filter chamber 2. The sealing cover 5 can seal the opening at the top of the filter box 1. Sealing bolts 6 are located at the four corners of the outer side of the sealing cover 5. The bolt 6 is threadedly connected to the sealing cover 5, and the sealing cover 5 is fixedly connected to the filter box 1 by the sealing bolt 6. Two sets of filter components 7 are provided inside the filter chamber 2 near the oil outlet pipe 3. The two sets of filter components 7 are arranged in parallel. The installation direction of the filter components 7 is perpendicular to the flow direction of the hydraulic oil inside the filter chamber 2. The outer edge of the filter components 7 is connected to the filter box 1. A buffer mechanism 8 is provided at the end of the filter components 7 near the oil inlet pipe 4. The installation direction of the buffer mechanism 8 is perpendicular to the flow direction of the hydraulic oil. The outer side of the buffer mechanism 8 is connected to the filter box 1. By setting the buffer mechanism 8, the hydraulic oil can be buffered, the flow speed of the hydraulic oil can be reduced, and the hydraulic oil flow speed can be prevented from being too fast and causing impact on the filter components 7.

[0024] Furthermore, the filter assembly 7 includes two sets of clamping seats 9 arranged opposite each other. The two sets of clamping seats 9 are symmetrically installed at both ends of the filter chamber 2 and are arranged in parallel. One end of the clamping seat 9 is fixedly connected to the filter box 1. A filter screen 10 is provided between the two sets of clamping seats 9. The filter screen 10 is a stainless steel hydraulic oil filter screen. The filter screen 10 is slidably inserted between the two sets of clamping seats 9. A sealing strip 11 is provided at the lower end of the filter screen 10. The sealing strip 11 is a soft corrosion-resistant rubber strip. The upper end of the sealing strip 11 is fixedly connected to the filter screen 10, and the lower end of the sealing strip 11 is in contact with the bottom surface of the filter chamber 2.

[0025] Furthermore, the buffer mechanism 8 includes a fixed frame 12, which is a rigid metal strip. Both ends of the fixed frame 12 are fixedly connected to the filter box 1. A fixed seat 13 is provided at one end of the fixed frame 12 near the oil inlet pipe 4. The fixed seat 13 is a rigid rectangular frame, and its outer side is fixedly connected to the filter box 1. A push rod 14 is provided at one end of the fixed frame 12 near the fixed seat 13. The push rod 14 is a rigid metal rod, and its installation direction is perpendicular to the fixed frame 12. The push rod 14 is slidably connected to the fixed frame 12. A movable plate 15 is provided inside the fixed seat 13 at a position relative to the end of the push rod 14. The movable plate 15 is a rigid metal plate, and its installation direction is perpendicular to the hydraulic oil flow direction. One end of the movable plate 15 is fixedly connected to the push rod 14. Buffer strips 16 are provided on both sides of the movable plate 15 near the fixed seat 13. The buffer strips 16 are elastic rubber strips, and they are U-shaped bends with the bend openings facing the oil inlet pipe 4. One end of the oil pipe 4 and the buffer strip 16 are fixedly connected to the moving plate 15, and the other end of the buffer strip 16 is fixedly connected to the fixed base 13. The buffer strip 16 is provided with multiple sets of oil passage holes 17. The oil passage holes 17 are through holes. By providing the oil passage holes 17, hydraulic oil can pass through the oil passage holes 17 and pass through the buffer strip 16. The push rod 14 is provided with a telescopic spring 18 on the outside. The telescopic spring 18 is installed between the fixed frame 12 and the moving plate 15. The telescopic spring 18 is sleeved on the outside of the push rod 14. One end of the telescopic spring 18 is fixedly connected to the fixed frame 12, and the other end of the telescopic spring 18 is fixedly connected to the moving plate 15. The end of the push rod 14 near the filter assembly 7 is provided with a limit plate 19. The limit plate 19 is a circular rigid plate. The diameter of the limit plate 19 is larger than that of the push rod 14. One end of the limit plate 19 is fixedly connected to the push rod 14. By providing the limit plate 19, the push rod 14 can be limited to prevent the push rod 14 from falling out of the fixed frame 12 during movement.

[0026] It should be noted that this utility model is a hydraulic oil filtration device for connecting a servo valve. In use, the oil outlet pipe 3 is first fixedly connected to the oil inlet of the servo valve, and then the hydraulic oil delivery pipe is fixedly connected to the oil inlet pipe 4. When the hydraulic oil enters the filter box 1 through the oil inlet pipe 4, the moving plate 15 blocks the hydraulic oil. The hydraulic oil pushes the telescopic spring 18 on the outside of the push rod 14 to contract through the moving plate 15, thereby buffering the flow of hydraulic oil and reducing its flow speed. The buffer strips 16 on both sides of the moving plate 15 enhance the blocking effect of the moving plate 15 on the hydraulic oil. The buffer strips 16 have oil passage holes 17 inside, facilitating the passage of hydraulic oil through the buffer strips 16. By setting the buffer mechanism 8, the flow speed of the hydraulic oil can be effectively reduced. Finally, the hydraulic oil passes through the filter assembly 7, and the filter screen 10 inside the filter assembly 7 filters out dust and impurities from the hydraulic oil. By setting the buffer mechanism 8, the flow speed of the hydraulic oil can be effectively reduced, preventing the hydraulic oil from impacting and damaging the filter screen 10 during flow, and effectively extending the service life of the filter screen 10. By setting a sealing strip 11, the sealing effect between the filter screen 10 and the bottom surface of the filter chamber 2 is increased, hydraulic oil leakage is avoided, and the filtration effect of the filter screen 10 can be improved.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A hydraulic oil filtering device for connecting a servo valve, comprising a filter box (1), wherein a filter cavity (2) is arranged inside the filter box (1), an oil outlet pipe (3) is arranged at one end of the filter box (1), an oil inlet pipe (4) is arranged at one end of the filter box (1), and a sealing cover (5) is arranged at the upper end of the filter box (1), wherein a sealing bolt (6) is arranged outside the sealing cover (5), characterized in that: The filter cavity (2) is provided with two groups of filter assemblies (7) at one end, the filter assemblies (7) are provided with buffer mechanisms (8) at one end, the buffer mechanisms (8) are perpendicular to the hydraulic oil flow direction in the mounting direction, the buffer mechanisms (8) comprise fixed frames (12), the fixed frames (12) are fixedly connected with the filter box (1), the fixed frames (12) are provided with fixed seats (13) at one end, the fixed seats (13) are fixedly connected with the filter box (1), the fixed frames (12) are provided with push rods (14) at one end, the fixed seats (13) are provided with moving plates (15) inside, the moving plates (15) are perpendicular to the hydraulic oil flow direction in the mounting direction, the moving plates (15) are fixedly connected with the push rods (14) at one end, the moving plates (15) are provided with buffer strips (16) on both sides, the push rods (14) are provided with telescopic springs (18) outside, and the telescopic springs (18) are sleeved outside the push rods (14). ​ 2. The hydraulic oil filter device for connecting a servo valve according to claim 1, characterized by: The buffer strip (16) is an elastic rubber strip, the buffer strip (16) is U-shaped, and the buffer strip (16) is curved towards the oil inlet pipe (4).

3. The hydraulic oil filter device for connecting a servo valve according to claim 2, characterized in that: The buffer strip (16) is provided with an oil passing hole (17) inside, and the oil passing hole (17) is a through hole.

4. The hydraulic oil filter device for connecting a servo valve according to claim 1, characterized by: The push rod (14) is a hard metal rod, the push rod (14) is perpendicular to the fixed frame (12) in the mounting direction, and the push rod (14) is slidably connected with the fixed frame (12).

5. A hydraulic fluid filter assembly for connecting a servo valve as defined in claim 4, wherein: The push rod (14) is provided with a limiting plate (19) at one end, the limiting plate (19) is larger in diameter than the push rod (14), and the limiting plate (19) is fixedly connected with the push rod (14) at one end.

6. The hydraulic oil filter device for connecting a servo valve according to claim 1, characterized by: The filter assembly (7) comprises two groups of clamping seats (9), the clamping seats (9) are fixedly connected with the filter box (1) at one end, and the filter net (10) is arranged between the two groups of clamping seats (9).

7. A hydraulic oil filter device for connecting a servo valve according to claim 6, characterized in that: The filter net (10) is provided with a sealing strip (11) at the lower end, the sealing strip (11) is a soft rubber strip, the sealing strip (11) is connected with the filter net (10) at the upper end, and the sealing strip (11) is in contact with the filter cavity (2) at the lower end.

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