Reversing valve

Abstract

The utility model discloses a reversing valve which comprises a valve body. A first oil channel is formed in the upper end of the rear side face of the valve body, a second oil channel is formed in the lower end of the right side face of the valve body, a third oil channel is formed in the lower end of the left side face of the valve body, a fixed valve is installed at the lower end in the valve body, a rotating shaft is rotationally connected to the middle of the fixed valve, and a movable valve is movably connected to the square section of the lower end of the rotating shaft in a sleeved mode. The upper end of the rotating shaft extends out of the upper surface of the cover plate and is provided with a switch rotating handle, the middle of the outer arc face of the rotating shaft is movably sleeved with a second spring, and the portions, located on the upper surfaces of the cover plate, the movable valve, the fixed valve and the movable valve, of the second spring are each provided with two through holes corresponding to the second oil way and the third oil way. Plane hard sealing between the movable valve and the fixed valve is achieved through the metal hard sealing structure, the sealing effect is good, meanwhile, the sealing structure is simplified, and the weight of the fuel reversing valve is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fuel reversing valve technology, specifically a reversing valve. Background Technology

[0002] A directional control valve is a type of valve with two or more flow patterns and two or more ports. It is used to control the flow of hydraulic oil, including communication, disconnection, and reversal, as well as pressure unloading and sequential action control. It relies on the relative movement of the valve core and valve body to control the direction of flow. Fuel directional control valves are used in vehicle fuel systems to reverse the flow of oil in various circuits and control the opening and closing of each port. In existing fuel directional control valves, the rotating parts inside are generally sealed to the valve body with soft sealing rings. In order to provide an installation position for the sealing rings, the rotating parts need to have a certain thickness, resulting in a large volume, complex structure, and heavy weight, which cannot meet the requirements of airdrop vehicles. Therefore, optimization is needed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a reversing valve that achieves a planar hard seal between the moving valve and the stationary valve through a metal hard seal structure. This provides a good sealing effect, simplifies the sealing structure, and reduces the weight of the fuel reversing valve, thus effectively solving the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a reversing valve, comprising a valve body;

[0005] Valve body: Oil passage one is opened at the upper end of its rear side, oil passage two is opened at the lower end of the right side of the valve body, and oil passage three is opened at the lower end of the left side of the valve body. A fixed valve is installed at the lower end of the valve body. A rotating shaft is rotatably connected to the middle of the fixed valve. A movable valve is movably sleeved on the square section at the lower end of the rotating shaft. A cover plate is installed at the upper end of the valve body. The upper end of the rotating shaft extends out of the upper surface of the cover plate and is equipped with a switch handle. A spring two is movably sleeved in the middle of the outer arc surface of the rotating shaft. Spring two is located between the cover plate and the movable valve. Two through holes corresponding to oil passage two and oil passage three are opened on the upper surface of both the fixed valve and the movable valve. A planar hard seal between the movable valve and the fixed valve is achieved through a metal hard seal structure, which has a good sealing effect, simplifies the sealing structure, and reduces the weight of the fuel reversing valve.

[0006] Furthermore, a spring seat is movably sleeved at the lower end of the outer arc surface of the rotating shaft. The spring seat is located between the second spring and the movable valve, providing support and positioning for the lower end of the second spring.

[0007] Furthermore, a friction-reducing pad is movably sleeved at the lower end of the outer arc surface of the rotating shaft. The friction-reducing pad is located between the spring seat and the movable door, reducing the wear of the movable door by the spring seat.

[0008] Furthermore, from bottom to top, spring one, washer and oil baffle are installed in the middle of the outer arc surface of the rotating shaft. The oil baffle is located inside the cover plate, spring one is located inside spring two, and the lower end of spring one contacts the boss on the outer arc surface of the rotating shaft, which facilitates the sealing between the rotating shaft and the cover plate.

[0009] Furthermore, the upper end of the rotating shaft is threaded with a hexagonal bolt, and a spring washer and a flat washer are installed on the outside of the hexagonal bolt from top to bottom. The flat washer is located above the switch handle to facilitate the fixing of the switch handle.

[0010] Furthermore, each of the large countersunk holes on the upper surface of the cover plate is fitted with an internal hexagon head screw, the lower ends of which are threaded to the valve body. A sealing ring is installed inside the groove on the outer arc surface of the cover plate, and the outer arc surface of the sealing ring contacts the inner arc surface at the upper end of the valve body, which facilitates the installation and sealing of the cover plate.

[0011] Furthermore, screws are installed inside the three small countersunk holes on the upper surface of the valve. The lower ends of the three screws are threaded to the valve body, and spring washers are movably fitted onto the upper ends of the three screws, which facilitates the fixed installation of the valve.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This reversing valve has the following advantages:

[0013] A planar hard seal between the moving valve and the fixed valve is achieved through a metal hard seal structure, and pressure is applied by a spring, so that there is a good sealing effect between the pipelines during and after the fuel reversing process. At the same time, the sealing structure is simplified and the weight of the fuel reversing valve is reduced. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a top view of the structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention along the AA direction;

[0017] Figure 4 This is a cross-sectional view of the valve body of this utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the movable door of this utility model.

[0019] In the diagram: 1. Hex bolt, 2. Spring washer 1, 3. Flat washer, 4. Switch handle, 5. Cover plate, 6. Socket head cap screw, 7. Oil baffle, 8. Washer, 9. Spring 1, 10. Spring 2, 11. Screw, 12. Spring washer 2, 13. Valve body, 14. Fixed valve, 15. Moving valve, 16. Anti-friction pad, 17. Shaft, 18. Spring seat, 19. Sealing ring, 20. Oil passage 1, 21. Oil passage 2, 22. Oil passage 3. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5 This embodiment provides a technical solution: a reversing valve, including a valve body 13;

[0022] Valve body 13: An oil passage 20 is provided on the upper rear side, serving as an oil inlet. An oil passage 21 is provided on the lower right side of valve body 13, and an oil passage 22 is provided on the lower left side of valve body 13. Both oil passages 21 and 22 are oil outlets. A fixed valve 14 is installed at the lower interior of valve body 13. A rotating shaft 17 is rotatably connected to the middle of the fixed valve 14. A movable valve 15 is movably fitted onto the square section at the lower end of the rotating shaft 17. A cover plate 5 is installed on the upper end of valve body 13. Fuel enters the cavity formed by valve body 13, cover plate 5, and movable valve 15 through oil passage 20. The upper end of the rotating shaft 17 extends beyond the upper surface of cover plate 5 and is equipped with a switch handle 4. Turning the switch handle 4 causes the movable valve 15 to rotate via the rotating shaft 17. A spring 10 is movably sleeved in the middle of the outer arc surface of valve 17. Spring 10 is located between the cover plate 5 and the movable valve 15. Two through holes, corresponding to oil passages 21 and 22, are opened on the upper surfaces of both the fixed valve 14 and the movable valve 15. When the arrow on the switch handle 4 points to oil passage 21, one of the two through holes on the movable valve 15 connects to the through hole on the right side of the fixed valve 14, thus connecting oil passage 20 to oil passage 21, while oil passage 22 does not connect to oil passage 20. When the arrow on the switch handle 4 points to the center position, the two through holes on the fixed valve 14 correspond to the positions of the two through holes on the fixed valve 14. At this time, both oil passages 21 and 22 are connected to oil passage 20. When the arrow on the switch handle 4 points to oil passage 22, the movable valve... One of the two round holes on the door 15 is connected to the through hole on the left side of the fixed valve 14. Oil passage 1 20 is not connected to oil passage 21, while oil passage 3 22 is connected to oil passage 1 20, thus realizing the switching of the oil circuit. A spring seat 18 is movably sleeved at the lower end of the outer arc surface of the rotating shaft 17. The spring seat 18 is located between the second spring 10 and the moving valve 15. A friction-reducing pad 16 is movably sleeved at the lower end of the outer arc surface of the rotating shaft 17. The friction-reducing pad 16 is located between the spring seat 18 and the moving valve 15. The lower surface of the moving valve 15 and the fixed valve 14 are ground and smooth. The second spring 10 applies pressure to the moving valve 15 through the spring seat 18 and the friction-reducing pad 16. The surfaces of the moving valve 15 and the fixed valve 14 are in close contact, providing a good sealing effect. The middle part of the outer arc surface of the rotating shaft 17 from bottom to top... A spring 9, a washer 8, and an oil baffle 7 are installed sequentially on the cover plate 5. The oil baffle 7 is located inside the cover plate 5 and seals the connection between the cover plate 5 and the rotating shaft 17. The spring 9 is located inside the spring 10, and the lower end of the spring 9 contacts the boss on the outer arc surface of the rotating shaft 17. The upper end of the oil baffle 7 is conical. The spring 9 provides pressure to the oil baffle 7 through the washer 8, improving the sealing between the oil baffle 7 and the cover plate 5. The upper end of the rotating shaft 17 is threadedly connected to a hex bolt 1. From top to bottom, spring washers 2 and flat washers 3 are installed on the outside of the hex bolt 1. The flat washers 3 are located above the switch handle 4. The hex bolt 1, spring washers 2 and flat washers 3 facilitate the connection between the switch handle 4 and the rotating shaft 17. The large countersunk holes on the upper surface of the cover plate 5 are all fitted with internal hexagonal head screws 6.The lower ends of the four hexagon socket head cap screws 6 are threaded to the valve body 13. These screws facilitate the installation and fixation of the cover plate 5. A sealing ring 19 is installed inside the groove on the outer arc surface of the cover plate 5. The outer arc surface of the sealing ring 19 contacts the inner arc surface at the upper end of the valve body 13, improving the sealing performance between the valve body 13 and the cover plate 5. Screws 11 are installed inside the three small countersunk holes on the upper surface of the valve 14. The lower ends of the three screws 11 are threaded to the valve body 13, and spring washers 12 are movably fitted onto the upper ends of the three screws 11. The screws 11 and spring washers 12 facilitate the fixed installation of the valve 14.

[0023] The working principle of the reversing valve provided by this utility model is as follows: External oil pipes are connected to oil passage 1 (20), oil passage 2 (21), and oil passage 3 (22) respectively. Oil passage 1 (20) is the oil inlet, and oil passages 21 and 3 (22) are the oil outlets. During use, fuel enters the cavity formed by the valve body 13, cover plate 5, and movable valve 15 through oil passage 1 (20). When the switch handle 4 is turned, the switch handle 4 drives the movable valve 15 to rotate via the rotating shaft 17. When the arrow on the surface of the switch handle 4 points to oil passage 21, one of the two through holes on the movable valve 15 connects to the through hole on the right side of the fixed valve 14, thus connecting oil passage 1 (20) to oil passage 21, while oil passage 3 (22) is not connected to oil passage 1 (20). When the switch handle... When the arrow on the surface of the switch handle 4 points to the center position, the two through holes on the fixed valve 14 correspond to the positions of the two through holes on the fixed valve 14. At this time, oil passage 21 and oil passage 32 are both connected to oil passage 10. When the arrow on the surface of the switch handle 4 points to oil passage 32, one of the two round holes on the moving valve 15 is connected to the through hole on the left side of the fixed valve 14. Oil passage 10 is not connected to oil passage 21, and oil passage 32 is connected to oil passage 10, thereby realizing the switching of the oil circuit. The lower surface of the moving valve 15 and the fixed valve 14 are ground and smooth. Spring 210 applies pressure to the moving valve 15 through spring seat 18 and anti-friction pad 16. The surfaces of the moving valve 15 and the fixed valve 14 are in close contact and have a good sealing effect.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A reversing valve, characterized in that: Including valve body (13); Valve body (13): An oil passage 1 (20) is provided at the upper end of its rear side, an oil passage 2 (21) is provided at the lower end of the right side of the valve body (13), an oil passage 3 (22) is provided at the lower end of the left side of the valve body (13), a fixed valve (14) is installed at the lower end of the interior of the valve body (13), a rotating shaft (17) is rotatably connected to the middle of the fixed valve (14), and a movable valve (15) is movably sleeved on the square section at the lower end of the rotating shaft (17). 13) is equipped with a cover plate (5) at its upper end. The upper end of the rotating shaft (17) extends out of the upper surface of the cover plate (5) and is equipped with a switch handle (4). A second spring (10) is movably sleeved in the middle of the outer arc surface of the rotating shaft (17). The second spring (10) is located between the cover plate (5) and the movable valve (15). Two through holes corresponding to the second oil passage (21) and the third oil passage (22) are opened on the upper surfaces of the fixed valve (14) and the movable valve (15).

2. A reversing valve according to claim 1, characterized in that: A spring seat (18) is movably sleeved at the lower end of the outer arc surface of the rotating shaft (17), and the spring seat (18) is located between the second spring (10) and the movable valve (15).

3. A reversing valve according to claim 2, characterized in that: The lower end of the outer arc surface of the rotating shaft (17) is movably fitted with a friction-reducing pad (16), which is located between the spring seat (18) and the movable valve (15).

4. A reversing valve according to claim 1, characterized in that: Spring 1 (9), washer (8) and oil baffle (7) are installed sequentially from bottom to top on the middle part of the outer arc surface of the rotating shaft (17). The oil baffle (7) is located inside the cover plate (5), and spring 1 (9) is located inside spring 2 (10). The lower end of spring 1 (9) is in contact with the boss on the outer arc surface of the rotating shaft (17).

5. A reversing valve according to claim 1, characterized in that: The upper end of the rotating shaft (17) is threaded with a hexagonal bolt (1). A spring washer (2) and a flat washer (3) are installed on the outside of the hexagonal bolt (1) from top to bottom. The flat washer (3) is located above the switch handle (4).

6. A reversing valve according to claim 1, characterized in that: The large countersunk holes on the upper surface of the cover plate (5) are all fitted with hexagonal head screws (6). The lower ends of the four hexagonal head screws (6) are threaded to the valve body (13). A sealing ring (19) is installed in the groove on the outer arc surface of the cover plate (5). The outer arc surface of the sealing ring (19) contacts the inner arc surface at the upper end of the valve body (13).

7. A reversing valve according to claim 1, characterized in that: Screws (11) are installed inside the three small countersunk holes on the upper surface of the valve (14). The lower ends of the three screws (11) are threaded to the valve body (13), and the upper ends of the three screws (11) are movably fitted with spring washers (12).

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