Novel mechanical hydraulic servo valve

Abstract

The utility model relates to the technical field of hydraulic servo valves, and discloses a novel mechanical hydraulic servo valve which comprises a valve body and a shaft hole, one end of the valve body is provided with a valve cover and a valve rod reset assembly, one end of the valve body is provided with an oil inlet hole, one end of the valve body is provided with an oil outlet hole, and the position, located at the oil inlet hole, of one end of the valve body is provided with a filtering mechanism. The filtering mechanism comprises a filtering box, one end of the filtering box is fixedly connected with the valve body, a filtering cavity is formed in the filtering box, an end cover is arranged at one end of the filtering box, a communicating pipe is arranged at one end of the end cover, a limiting ring is arranged at one end in the filtering cavity and fixedly connected with the filtering cavity, a filtering plate is arranged at one end in the filtering cavity, and filtering holes are formed in the surface of the filtering plate. The filter plate is slidably mounted in the filter cavity, and a filter screen is arranged at one end of the filter plate. According to the hydraulic servo valve, the filtering mechanism is arranged, hydraulic oil entering the servo valve can be filtered, damage to the servo valve caused by dust and impurities is reduced, and the service life of the hydraulic servo valve is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic servo valve technology, and in particular to a novel mechanical hydraulic servo valve. Background Technology

[0002] A hydraulic valve is an automated component operated by pressurized oil. It is controlled by the pressurized oil of a pressure regulating valve and is usually used in combination with a solenoid pressure regulating valve. It can be used for remote control of the on / off of oil, gas and water pipeline systems in hydropower stations.

[0003] Existing mechanical hydraulic servo valves suffer from jamming and wear due to dust and impurities in the hydraulic oil during use, which affects their service life. To address this, we propose a new type of mechanical hydraulic servo valve. Utility Model Content

[0004] The main objective of this invention is to provide a novel mechanical hydraulic servo valve that 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 novel mechanical hydraulic servo valve includes a valve body with a shaft hole inside. A valve cover is provided at one end of the valve body. A valve stem reset assembly is provided inside the shaft hole. An oil inlet hole and an oil outlet hole are provided at one end of the valve body. A filter mechanism is provided at the position of the oil inlet hole at one end of the valve body, and one end of the filter mechanism is fixedly connected to the valve body. The filter mechanism includes a filter box, one end of which is fixedly connected to the valve body. A filter chamber is provided inside the filter box. An end cover is provided at one end of the filter box, and the end cover is fixedly connected to the filter chamber. A connecting pipe is provided at one end of the end cover, and one end of the connecting pipe extends into the filter chamber. A limiting ring is provided at one end of the filter chamber, and the limiting ring is fixedly connected to the filter chamber. A filter plate is provided at one end of the filter chamber, and filter holes are provided on the surface of the filter plate. The filter plate is slidably installed inside the filter chamber, and a filter screen is provided at one end of the filter plate.

[0006] Preferably, the filter plate is a circular stainless steel mesh plate, and the filter screen is a polyester fiber filter screen, which is slidably installed inside the filter chamber.

[0007] Preferably, one end of the filter plate is provided with a second sealing ring, one end of which is fixedly connected to the filter plate, and one end of the filter screen is provided with a first sealing ring.

[0008] Preferably, one end of the connecting pipe is provided with a clamping component, one end of which is fixedly connected to the connecting pipe, and the other end of which is in contact with the filter plate.

[0009] Preferably, the clamping assembly includes a fixing ring, which is fixedly connected to the connecting pipe. One end of the fixing ring is provided with two sets of connecting rods, which are installed perpendicular to the filter plate. One end of the connecting rod is fixedly connected to the fixing ring, and one end of the connecting rod is provided with a pressure plate.

[0010] Preferably, the pressure plate is a frustum-shaped rigid block with different diameters at both ends, with the end of the pressure plate with a larger diameter facing the filter plate, and one end of the pressure plate is fixedly connected to the connecting rod.

[0011] This utility model provides a novel mechanical hydraulic servo valve, which has the following beneficial effects:

[0012] 1. A novel mechanical hydraulic servo valve, which, by setting a filtration mechanism, can filter the hydraulic oil entering the servo valve, reduce the damage caused by dust and impurities to the servo valve, and extend the service life of the hydraulic servo valve.

[0013] 2. A novel mechanical hydraulic servo valve, by setting a clamping component, can squeeze the filter plate and filter screen, reduce the gap between the filter plate and filter screen, prevent oil leakage from the gap, and improve the filtration effect of the filter plate and filter screen on hydraulic oil. Attached Figure Description

[0014] 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.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a partial structural diagram of the valve body of this utility model;

[0017] Figure 3 This is a schematic diagram of the filter mechanism structure of this utility model;

[0018] Figure 4 This utility model Figure 3 Enlarged diagram of point A in the middle.

[0019] Legend:

[0020] 1. Valve body; 2. Shaft hole; 3. Valve cover; 4. Valve stem reset assembly; 5. Oil inlet; 6. Oil outlet; 7. Filtering mechanism; 8. Filter box; 9. Filter chamber; 10. End cap; 11. Connecting pipe; 12. Limiting ring; 13. Filter plate; 14. Filter screen; 15. First sealing ring; 16. Second sealing ring; 17. Pressing assembly; 18. Fixing ring; 19. Connecting rod; 20. Pressure plate. Detailed Implementation

[0021] 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.

[0022] Example: A novel mechanical hydraulic servo valve, such as Figure 1 - Figure 4 As shown, the valve includes a valve body 1, with a shaft hole 2 inside the valve body 1. A valve cover 3 is positioned on one side of the valve body 1 relative to the shaft hole 2, and the valve cover 3 is fixedly connected to the valve body 1 by bolts. The valve cover 3 can seal the shaft hole 2. A valve stem reset assembly 4 is installed inside the shaft hole 2. The shape of the valve stem reset assembly 4 is adapted to the diameter of the shaft hole 2, and the valve stem reset assembly 4 is slidably installed inside the shaft hole 2. One end of the valve stem reset assembly 4 extends through the valve cover 3 to the outside of the valve body 1. An oil inlet hole 5 is provided on one side of the valve body 1, and one end of the oil inlet hole 5 is connected to the internal cavity of the shaft hole 2. An oil outlet 6 is provided at one end of the oil inlet hole 5. The oil outlet 6 is connected to the inside of the shaft hole 2. The oil inlet hole 5 can be connected to the oil outlet 6 through the shaft hole 2. In use, the oil inlet hole 5 and the oil outlet 6 can be closed or opened by controlling the valve stem reset assembly 4. A filter mechanism 7 is provided on the outside of the valve body 1 near the oil inlet hole 5. One end of the filter mechanism 7 is fixedly connected to the valve body 1. The filter mechanism 7 is sleeved on the outside of the oil inlet hole 5. The filter mechanism 7 can filter the hydraulic oil entering the oil inlet hole 5 to prevent dust and impurities inside the hydraulic oil from damaging the servo valve.

[0023] Furthermore, the filtration mechanism 7 includes a filter box 8, which is a rectangular hollow shell. One end of the filter box 8 is fixedly connected to the valve body 1. A filter chamber 9 is provided inside the filter box 8. The filter chamber 9 is a cylindrical hollow shell with openings at both ends. The filter chamber 9 is installed inside the filter box 8, and its lower end is fixedly connected to the filter box 8. The internal diameter of the filter chamber 9 is adapted to the oil inlet 5. One end of the filter chamber 9 is fixedly connected to the valve body 1. An end cap 1 is provided at the opening of the filter box 8 away from the valve body 1. 0. The end cap 10 is a rectangular rigid plate. The four outer corners of the end cap 10 are fixedly connected to the filter chamber 9 by bolts. A connecting pipe 11 is provided in the center of the end cap 10. The connecting pipe 11 is fixedly connected to the end cap 10 and extends through the end cap 10 into the filter chamber 9. A limit ring 12 is provided at one end of the filter chamber 9 near the oil inlet 5. The limit ring 12 is an annular metal ring. The outer side of the limit ring 12 is fixedly connected to the inner wall of the filter chamber 9. A filter plate is provided at one end of the filter chamber 9 near the connecting pipe 11. 13. The filter plate 13 is a circular stainless steel metal plate with filter holes evenly distributed on its surface. The shape of the filter plate 13 is adapted to the inner side of the filter cavity 9. The filter plate 13 is slidably installed inside the filter cavity 9. A filter screen 14 is provided at one end of the filter plate 13 near the limiting ring 12. The filter screen 14 is a circular polyester fiber filter screen. The shape of the filter screen 14 is adapted to the filter cavity 9. The filter screen 14 is slidably installed inside the filter cavity 9. A second sealing ring 16 is provided at one end of the filter plate 13 near the filter screen 14. The second sealing ring 16 is an annular soft ring. One end of the second sealing ring 16 is fixedly connected to the filter plate 13. A first sealing ring 15 is provided at one end of the filter screen 14 near the limiting ring 12. The first sealing ring 15 is an annular sealing ring. One end of the first sealing ring 15 is fixedly connected to the filter screen 14. A pressing component 17 is provided at one end of the connecting pipe 11 near the filter plate 13. One end of the pressing component 17 is fixedly connected to the connecting pipe 11, and the other end of the pressing component 17 is in contact with the surface of the filter plate 13.

[0024] Furthermore, the clamping assembly 17 includes a fixing ring 18, which is an annular hard metal ring. The fixing ring 18 is sleeved on the outside of the connecting pipe 11, and the inside of the fixing ring 18 is fixedly connected to the connecting pipe 11. Two sets of connecting rods 19 are provided at one end of the fixing ring 18 near the filter plate 13. The two sets of connecting rods 19 are symmetrically installed at both ends of the fixing ring 18. The installation direction of the connecting rods 19 is perpendicular to the filter plate 13. One end of the connecting rod 19 is fixedly connected to the fixing ring 18. A pressure plate 20 is provided at one end of the connecting rod 19 near the filter plate 13. The pressure plate 20 is a frustum-shaped hard block with different diameters at both ends. The end of the pressure plate 20 with the larger diameter faces the filter plate 13. One end of the pressure plate 20 is fixedly connected to the connecting rod 19.

[0025] It should be noted that this utility model is a novel mechanical hydraulic servo valve. During the assembly of the servo valve, the filter screen 14 and the filter plate 13 are first placed into the filter chamber 9 in sequence. Then, the end cover 10 is installed as a whole at the end of the filter box 8. The end cover 10 is fixedly connected to the filter box 8 by bolts. After the end cover 10 is installed in place, the end of the clamping component 17 will contact the filter plate 13. By setting the clamping component 17, the gap between the filter plate 13 and the filter screen 14 can be squeezed, reducing the gap between the filter plate 13 and the filter screen 14, preventing oil leakage from the gap, and improving the filtration effect. In use, the hydraulic oil delivery pipeline is fixedly connected to the connecting pipe 11, and the hydraulic oil delivery pipeline is fixedly connected to the oil outlet 6. Then, the opening and closing of the oil inlet 5 and the oil outlet 6 can be realized by controlling the valve stem reset component 4. When the hydraulic oil passes through the filter chamber 9, the filter plate 13 and the filter screen 14 inside the filter chamber 9 can filter the dust and impurities inside the hydraulic oil, preventing dust and impurities from entering the servo valve and causing damage to the servo valve. By setting up the filter mechanism 7, the hydraulic oil entering the servo valve can be filtered, reducing the damage caused by dust and impurities to the servo valve and extending its service life. By setting up the clamping component 17, the filter plate 13 and the filter screen 14 can be squeezed, reducing the gap between the filter plate 13 and the filter screen 14, preventing oil leakage from the gap, and improving the filtration effect of the filter plate 13 and the filter screen 14 on the hydraulic oil.

[0026] 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 novel mechanical hydraulic servo valve, comprising a valve body (1), an axle hole (2) is arranged inside the valve body (1), a valve cover (3) is arranged at one end of the valve body (1), a valve rod reset assembly (4) is arranged inside the axle hole (2), an oil inlet hole (5) is arranged at one end of the valve body (1), and an oil outlet hole (6) is arranged at one end of the valve body (1), characterized in that: The filter mechanism (7) is fixedly connected with the valve body (1) at one end, and comprises a filter box (8), one end of which is fixedly connected with the valve body (1), and the filter box (8) is internally provided with a filter cavity (9), one end of the filter box (8) is provided with an end cover (10) fixedly connected with the filter cavity (9), one end of the end cover (10) is provided with a communication pipe (11) extending into the filter cavity (9), one end of the filter cavity (9) is provided with a limiting ring (12) fixedly connected with the filter cavity (9), one end of the filter cavity (9) is provided with a filter plate (13), the surface of the filter plate (13) is provided with filter holes, the filter plate (13) is slidingly installed in the filter cavity (9), and one end of the filter plate (13) is provided with a filter screen (14).

2. A new mechanical hydraulic servo valve according to claim 1, characterized in that: The filter plate (13) is a circular stainless steel mesh plate, the filter screen (14) is a polyester fiber filter screen, and the filter screen (14) is slidingly installed in the filter cavity (9).

3. A novel mechanical hydraulic servo valve as claimed in claim 2, wherein: One end of the filter plate (13) is provided with a second sealing ring (16) fixedly connected with the filter plate (13), and one end of the filter screen (14) is provided with a first sealing ring (15).

4. A new mechanical hydraulic servo valve according to claim 1, characterized in that: One end of the communication pipe (11) is provided with a pressing assembly (17) fixedly connected with the communication pipe (11), and the other end of the pressing assembly (17) is in contact with the filter plate (13).

5. A novel mechanical hydraulic servo valve as claimed in claim 4, wherein: The pressing assembly (17) comprises a fixed ring (18) fixedly connected with the communication pipe (11), two groups of connecting rods (19) are arranged at one end of the fixed ring (18), the installation direction of the connecting rods (19) is perpendicular to the filter plate (13), one end of the connecting rod (19) is fixedly connected with the fixed ring (18), and one end of the connecting rod (19) is provided with a pressing plate (20).

6. A novel mechanical hydraulic servo valve as claimed in claim 5, wherein: The pressing plate (20) is a circular truncated cone hard block with different diameters at two ends, one end of the pressing plate (20) with a larger diameter faces the filter plate (13), and one end of the pressing plate (20) is fixedly connected with the connecting rod (19).

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