High-speed three-way two-position hydraulic reversing valve

Abstract

The high-speed three-way two-position hydraulic reversing valve comprises a valve body and a valve cavity, valve elements connected through a connecting rod are slidably connected to the two sides of an inner cavity of the valve cavity, the valve element on the left side is driven by an external hydraulic mechanism, and the valve element on the right side is connected with the inner cavity of the valve cavity through a reset spring; an oil port O, an oil port A and an oil port B which are sequentially formed between the two valve elements from left to right are formed in inner cavities of the valve cavities, and inner grooves are formed in the two sides of each valve cavity. When the high-speed three-way two-position hydraulic reversing valve normally moves, friction between a hollow elastic sealing ring and a valve cavity is reduced, the situation that the service life is shortened due to severe abrasion generated when the high-speed three-way two-position hydraulic reversing valve repeatedly moves left and right is prevented, and through arrangement of a push plate and a top plate on the two sides, automatic extrusion is achieved after the high-speed three-way two-position hydraulic reversing valve moves in place; the hollow elastic sealing ring expands for sealing again, friction loss can be effectively reduced while the sealing effect is guaranteed, and the service life of the reversing valve is effectively prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic reversing valves, in particular to a high-speed three-way two-position hydraulic reversing valve. Background Art

[0002] The high-speed three-way two-position hydraulic reversing valve is a high-efficiency control valve used in hydraulic systems, which can realize rapid switching of fluid flow direction. The valve is usually composed of a valve body, a valve core and a seal. There are two adjustment ports on the valve core. Through the action of a power component (such as a solenoid valve or a manual switch), the valve core is displaced relative to the valve seat, thereby achieving communication with or interception of another channel. When the valve core moves in one direction, one inlet is connected to the outlet, and the other inlet is intercepted; when the valve core moves in the other direction, the other inlet is connected to the outlet, and the original inlet is intercepted. Through such switching, the two-position three-way reversing valve can control the flow direction of the fluid.

[0003] The existing three-way, two-position hydraulic reversing valve needs to use a seal to seal the valve core and the valve cavity. Severe friction will be generated when moving left and right, which will cause the seal to fail over time and need to be replaced or repaired, and the service life is short. A three-way, two-position hydraulic reversing valve that can effectively extend the service life is now proposed. During normal movement, the friction between the hollow elastic sealing ring and the valve cavity is reduced to prevent severe wear and tear during repeated left and right movements, thereby reducing the service life. In addition, through the arrangement of push plates and top plates on both sides, the valve core is automatically squeezed after moving into place, and the hollow elastic sealing ring expands to seal again. While ensuring the sealing effect, the friction loss can be effectively reduced, and the service life of the reversing valve is effectively extended. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a high-speed three-way, two-position hydraulic reversing valve, which solves the problem that the three-way, two-position hydraulic reversing valve needs to seal the valve core and the valve cavity through a seal, which will generate severe friction when moving left and right, causing the seal to fail over time and requiring replacement or repair, and having a short service life. A three-way, two-position hydraulic reversing valve that can effectively extend its service life is now proposed.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a high-speed three-way two-position hydraulic reversing valve, comprising a valve body and a valve cavity, both sides of the inner cavity of the valve cavity are slidably connected with valve cores connected by connecting rods, the valve core on the left side is driven by an external hydraulic mechanism, and the valve core on the right side is connected to the inner cavity of the valve cavity through a reset spring, the inner cavity of the valve cavity is provided with O, A, and B oil ports arranged from left to right between the two valve cores, both sides of the two valve cavities are provided with inner grooves, both ends of the inner grooves are fixedly connected with spring air bags, the opposite ends of the two spring air bags are fixedly connected with push plates, both sides of the inner grooves are fixedly connected with lifting springs, one end of the reset spring is fixedly connected to the side of the push plate, and the inner cavity of the valve cavity is fixedly connected with a top plate located in the inner cavity of the inner groove; An embedded groove is provided on one side of the valve core, and the embedded groove is circumferentially covered with a hollow elastic sealing ring. The hollow elastic sealing ring is connected with two spring air bags respectively through air guide pipes. The oil ports are switched during use. When the A and 0 oil ports are connected, the hydraulic mechanism drives the two valve cores to move toward the left at the same time. At this time, the B oil port is blocked. At this time, the hollow elastic sealing ring is in a normal state and does not generate friction with the valve cavity. When the movement is in place, the top plate squeezes the push plate to compress the spring air bag and the lifting spring. The spring air bag is compressed, and the internal gas is transported to the hollow elastic sealing ring through the air guide pipe. When the spring is in the air, it expands and the air bag is inflated, so the air bag will not rub against the valve cavity, and the friction between the air bag and the valve cavity will be reduced during normal movement, so as to prevent the air bag from being worn out during repeated left and right movements, thereby shortening the service life of the valve. In addition, the push plates and the top plates on both sides are set so that the air bag is automatically squeezed after the valve is in place, and the hollow elastic sealing ring expands to seal again, which can effectively reduce the friction loss while ensuring the sealing effect, and effectively extend the service life of the reversing valve.

[0006] As a further solution of the present invention: when the A and O oil ports are connected, the top plate abuts against the left push plate, and the left spring airbag contracts to the left.

[0007] As a further solution of the present invention: when the A and B oil ports are connected, the top plate abuts against the right push plate, and the right spring airbag contracts to the right.

[0008] As a further solution of the present invention: when the A and O oil ports are connected, the hollow elastic sealing ring on the right side surface of the valve core is located on the left side of the B oil port.

[0009] As a further solution of the present invention: when the A and B oil ports are connected, the hollow elastic sealing rings on the surfaces of all valve cores on the left are located on the right side of the O oil port.

[0010] As a further solution of the present invention: the two valve cores have the same structure and are symmetrically arranged on both sides of the connecting rod.

[0011] Compared with the prior art, the present invention has the following beneficial effects: reducing the friction between the hollow elastic sealing ring and the valve cavity during normal movement, preventing severe wear during repeated left and right movements, and reducing the service life; and through the arrangement of the push plates and the top plates on both sides, automatically squeezing after moving into place, the hollow elastic sealing ring expands to seal again, which can effectively reduce friction loss while ensuring the sealing effect, and effectively extend the service life of the reversing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural cross-sectional view of the present invention; Figure 2 It is a partial structural cross-sectional view of the present invention; Figure 3 For the present invention Figure 1 A partial enlarged view of the middle A; Figure 4 For the present invention Figure 1 A partial enlarged view of point B in the middle.

[0013] In the figure: 1. valve body; 2. valve chamber; 3. valve core; 4. connecting rod; 6. return spring; 7. inner groove; 8. spring airbag; 9. lifting spring; 10. push plate; 11. top plate; 12. air guide duct; 13. hollow elastic sealing ring; 14. embedded groove. DETAILED DESCRIPTION

[0014] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0015] See also Figure 1-4 The present invention provides a technical solution: a high-speed three-way two-position hydraulic reversing valve, comprising a valve body 1 and a valve cavity 2, both sides of the inner cavity of the valve cavity 2 are slidably connected with valve cores 3 connected by connecting rods 4, the left valve core 3 is driven by an external hydraulic mechanism, and the right valve core 3 is connected to the inner cavity of the valve cavity 2 through a reset spring 6, the inner cavity of the valve cavity 2 is provided with O, A, B oil ports arranged from left to right between the two valve cores 3, both sides of the two valve cavities 2 are provided with inner grooves 7, both ends of the inner grooves 7 are fixedly connected with spring air bags 8, the opposite ends of the two spring air bags 8 are fixedly connected with push plates 10, both sides of the inner grooves 7 are fixedly connected with lifting springs 9, one end of the reset spring 6 is fixedly connected to the side of the push plate 10, and the inner cavity of the valve cavity 2 is fixedly connected with a top plate 11 located in the inner cavity of the inner groove 7; An embedded groove 14 is provided on one side of the valve core 3, and the embedded groove 14 is circumferentially covered with a hollow elastic sealing ring 13. The hollow elastic sealing ring 13 is connected to the two spring airbags 8 respectively through the air guide pipe 12. The oil port is switched during use. When the A and 0 oil ports are connected, the hydraulic mechanism drives the two valve cores 3 to move toward the left at the same time. At this time, the B oil port is blocked. At this time, the hollow elastic sealing ring 13 is in a normal state and does not generate friction with the valve cavity 2. When the movement is in place, the top plate 11 squeezes the push plate 10 to compress the spring airbag 8 and the lifting spring 9. The spring airbag 8 is compressed, and the internal gas is transported to the inside of the hollow elastic sealing ring 13 through the air guide pipe 12. At this time, the hollow elastic The sealing ring 13 expands to seal the gap between the valve core 3 and the valve cavity 2. When resetting, the spring airbag 8 automatically expands and the hollow elastic sealing ring 13 contracts, and there is no friction between the valve cavity 2. During normal movement, the friction between the hollow elastic sealing ring 13 and the valve cavity 2 is reduced to prevent severe wear during repeated left and right movements, thereby reducing the service life. In addition, through the arrangement of the push plates 10 and the top plate 11 on both sides, the hollow elastic sealing ring 13 is automatically squeezed after moving into place, and the hollow elastic sealing ring 13 expands to seal again. While ensuring the sealing effect, the friction loss can be effectively reduced, and the service life of the reversing valve is effectively extended. The two fixed points expand and can automatically contract to reduce friction when moving.

[0016] When the A and O oil ports are connected, the top plate 11 abuts against the left push plate 10, and the left spring airbag 8 contracts to the left.

[0017] When the A and B oil ports are connected, the top plate 11 abuts against the right push plate 10, and the right spring airbag 8 contracts to the right.

[0018] When the A and O oil ports are connected, the hollow elastic sealing ring 13 on the surface of the right valve core 3 is located on the left side of the B oil port.

[0019] When the A and B oil ports are connected, the hollow elastic sealing ring 13 on the surface of all the valve cores 3 on the left side is located on the right side of the O oil port.

[0020] The two valve cores 3 have the same structure and are symmetrically arranged on both sides of the connecting rod 4 .

[0021] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A high-speed three-way two-position hydraulic reversing valve, comprising a valve body (1) and a valve chamber (2), wherein both sides of the inner cavity of the valve chamber (2) are slidably connected to a valve core (3) connected via a connecting rod (4), the valve core (3) on the left side is driven by an external hydraulic mechanism, and the valve core (3) on the right side is connected to the inner cavity of the valve chamber (2) via a return spring (6), characterized in that: The inner cavity of the valve cavity (2) is provided with oil ports O, A and B which are arranged in sequence from left to right between the two valve cores (3); inner grooves (7) are provided on both sides of the two valve cavities (2); spring air bags (8) are fixedly connected to both ends of the inner grooves (7); push plates (10) are fixedly connected to the opposite ends of the two spring air bags (8); lifting springs (9) are fixedly connected to both sides of the inner grooves (7); one end of the return spring (6) is fixedly connected to the side of the push plate (10); and the inner cavity of the valve cavity (2) is fixedly connected to a top plate (11) located in the inner cavity of the inner grooves (7); An embedded groove (14) is provided on one side of the valve core (3), and the embedded groove (14) is circumferentially covered with a hollow elastic sealing ring (13), and the hollow elastic sealing ring (13) is connected to two spring airbags (8) respectively through air guide pipes (12).

2. A high-speed three-way two-position hydraulic reversing valve according to claim 1, characterized in that: When the A and O oil ports are connected, the top plate (11) abuts against the left push plate (10), and the left spring airbag (8) contracts to the left.

3. A high-speed three-way two-position hydraulic reversing valve according to claim 1, characterized in that: When the A and B oil ports are connected, the top plate (11) abuts against the right push plate (10), and the right spring airbag (8) contracts to the right.

4. A high-speed three-way two-position hydraulic reversing valve according to claim 1, characterized in that: When the A and O oil ports are connected, the hollow elastic sealing ring (13) on the surface of the right valve core (3) is located on the left side of the B oil port.

5. A high-speed three-way two-position hydraulic reversing valve according to claim 1, characterized in that: When the A and B oil ports are connected, the hollow elastic sealing ring (13) on the surface of all the valve cores (3) on the left side is located on the right side of the O oil port.

6. A high-speed three-way two-position hydraulic reversing valve according to claim 1, characterized in that: The two valve cores (3) have the same structure and are symmetrically arranged on both sides of the connecting rod (4).

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