Rotary reversing valve structure

Abstract

The utility model relates to the technical field of control valves, and discloses a rotary reversing valve structure which comprises a valve body, a valve element groove is formed in an inner cavity of the valve body, a valve element is rotationally connected in an inner cavity of the valve element groove, a valve sleeve is sleeved on the outer side of the valve element, and a flat groove is formed in the outer side of the valve element. An oil channel hole is formed in an inner cavity of the valve sleeve and corresponds to the flat groove in position, a second sealing piece is installed at the matching position of the valve element and the valve sleeve, a first sealing piece is installed at the matching position of the valve sleeve and the valve body, and a driving mechanism is installed at the top of the valve element. According to the utility model, the high-pressure-resistant and high-elasticity sealing elements are arranged between the valve core and the valve sleeve and between the valve sleeve and the valve body, so that the leakage of high-pressure liquid is effectively prevented, and the sealing performance of the valve is obviously improved; and the surface of the valve core is subjected to special hardening treatment and is processed into a cylindrical shape with high precision, so that the matching between the valve core and the valve sleeve is tighter, the abrasion caused by friction is reduced, and the service life of the valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a rotary reversing valve structure. Background Art

[0002] With the continuous development of hydraulic technology, high-pressure and high-flow hydraulic systems are becoming increasingly common. Since open-circuit pumps cannot change the direction of the fluid, reversing valves play an indispensable role in open-circuit systems. Currently, almost all reversing valves are spool valves. Due to their structure, they have disadvantages such as limited flow rate and high pressure drop. This not only results in low system efficiency but also causes severe system heat generation, affecting normal operation of the system.

[0003] A search revealed Chinese patent number CN213176892U, which discloses a rotary reversing valve comprising a valve body, a left output connector on the left side of the valve body, and a right output connector on the right side of the valve body, the left output connector being positioned higher than the right output connector. An input connector is provided at the bottom of the valve body, and a vertically arranged fluid channel is provided within the valve body, the bottom of the fluid channel being connected to the input connector. A valve tube is provided to rotate within the fluid channel. The rotary reversing valve provided by this utility model utilizes a manually rotated handle to drive the valve shaft, which in turn drives the valve tube to rotate within the fluid channel, discharging fluid from the right output connector. Compared to existing rotary reversing valves, this valve has a simpler structure and is easier to use, significantly reducing the production and operating costs of rotary reversing valves and making it suitable for widespread adoption.

[0004] In the above-mentioned fluid control system, the reversing valve is a key component for regulating the flow direction of the fluid. However, the reversing valve mostly adopts a sliding structure. These structures are prone to wear, poor sealing, inflexible switching and other problems during long-term operation. Especially in high-pressure, high-flow or corrosive fluid environments, these problems are particularly prominent, which in turn affects the normal use of the reversing valve. Based on this, the utility model designs a rotary reversing valve structure to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a rotary reversing valve structure, which solves the problems of wear and poor sealing in the background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A rotary reversing valve structure includes a valve body, an inner cavity of the valve body is provided with a valve core groove, a valve core is rotatably connected in the inner cavity of the valve core groove, a valve sleeve is sleeved on the outer side of the valve core, a flat groove is provided on the outer side of the valve core, an inner cavity of the valve sleeve is provided with an oil passage hole corresponding to the position of the flat groove, a second sealing member is installed at the matching position of the valve core and the valve sleeve, a first sealing member is installed at the matching position of the valve sleeve and the valve body, and a driving mechanism is installed on the top of the valve core to drive the valve core to rotate;

[0008] A first control oil circuit and a second control oil circuit are provided in the inner cavity of the valve body. The first control oil circuit and the second control oil circuit are respectively arranged on both sides of the valve core, and the oil circuits are connected and interrupted according to the rotation of the valve core.

[0009] Preferably, the valve core is a high-precision cylindrical shape with a hardened surface. The outer walls of the valve core and the valve sleeve are provided with lubrication grooves to automatically collect and retain a small amount of lubricating oil. The materials of the valve core, valve sleeve and valve body are all alloy materials.

[0010] Preferably, a control oil inlet chamber is provided on one side of the valve core, and a low-pressure oil return chamber is provided on the other side of the valve core.

[0011] Preferably, seals are installed at the gap between the valve core and the valve sleeve, and at the gap between the valve sleeve and the valve body, to prevent leakage of high-pressure liquid and reduce wear.

[0012] Preferably, the driving mechanism adopts external power to connect with the valve core through a low-friction connection to reduce energy loss and wear during power transmission.

[0013] Preferably, the flat groove is asymmetrically designed to communicate with the oil channel hole of the valve sleeve to control the flow direction of the fluid.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0015] 1. This utility model effectively prevents the leakage of high-pressure liquid and significantly improves the sealing performance of the valve by installing high-pressure resistant and highly elastic seals between the valve core and the valve sleeve, as well as between the valve sleeve and the valve body. The surface of the valve core is specially hardened and machined into a cylindrical shape with high precision, which makes the fit between the valve core and the valve sleeve tighter, reduces the wear caused by friction, and extends the service life of the valve.

[0016] 2. In the present invention, the flat groove on the outside of the valve core is asymmetrically designed and corresponds to the position of the oil channel holes in the inner cavity of the valve sleeve. When the valve core rotates, the flat groove can accurately align or stagger the oil channel holes in different directions, thereby realizing fast and accurate switching of the fluid flow direction; the drive mechanism and the valve core are connected by a non-contact or low-friction connection method, which reduces energy loss and wear during power transmission, ensures smooth rotation of the valve core, and improves the flexibility and accuracy of fluid switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the internal structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the valve core of the utility model being located in the middle position;

[0019] Figure 3 This is a schematic diagram of the valve core of the utility model rotating clockwise;

[0020] Figure 4 This is a schematic diagram of the valve core of the utility model rotating counterclockwise;

[0021] Figure 5 This is a schematic diagram of the structure of the valve sleeve of the utility model;

[0022] Figure 6 This is a structural diagram of the valve core of the utility model.

[0023] Among them: 1. Valve body; 2. Valve core groove; 3. Valve core; 4. Valve sleeve; 5. Flat groove; 6. Oil channel hole; 7. First sealing member; 8. Second sealing member; 9. Drive mechanism; 10. First control oil circuit; 11. Second control oil circuit; 12. Lubrication groove; 13. Control oil inlet chamber; 14. Low-pressure oil return chamber. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Please refer to Figures 1-6A rotary reversing valve structure includes a valve body 1, an inner cavity of the valve body 1 is provided with a valve core groove 2, a valve core 3 is rotatably connected in the inner cavity of the valve core groove 2, a valve sleeve 4 is sleeved on the outer side of the valve core 3, a flat groove 5 is provided on the outer side of the valve core 3, an inner cavity of the valve sleeve 4 is provided with an oil passage hole 6 and the position of the oil passage hole 6 corresponds to the flat groove 5, a second sealing member 8 is installed at the matching position of the valve core 3 and the valve sleeve 4, a first sealing member 7 is installed at the matching position of the valve sleeve 4 and the valve body 1, a driving mechanism 9 is installed on the top of the valve core 3 to drive the valve core 3 to rotate, the flat groove 5 is asymmetrically designed, and is used to penetrate the oil passage hole 6 of the valve sleeve 4 to control the flow direction of the fluid;

[0026] A first control oil circuit 10 and a second control oil circuit 11 are provided in the inner cavity of the valve body 1 . The first control oil circuit 10 and the second control oil circuit 11 are respectively provided on both sides of the valve core 3 , and the oil circuits are connected or disconnected according to the rotation of the valve core 3 .

[0027] In the embodiment of the present utility model, the valve sleeve 4 is tightly fitted on the outer side of the valve core 3, and a second sealing member 8 is installed in the gap between the two to ensure that no liquid leakage occurs during the rotation process; at the same time, a first sealing member 7 is also installed at the fitting point of the valve sleeve 4 and the valve body 1, which further enhances the sealing performance of the valve. These seals are made of high-pressure resistant and highly elastic materials, which effectively prevents the leakage of high-pressure liquid, reduces wear and tear, and extends the service life.

[0028] Please refer to Figures 1-6 The valve core 3 is a high-precision cylindrical shape and its surface is hardened. The outer walls of the valve core 3 and the valve sleeve 4 are provided with lubrication grooves 12 to automatically collect and retain a small amount of lubricating oil. The materials of the valve core 3, valve sleeve 4 and valve body 1 are all alloy materials. A control oil inlet chamber 13 is provided on one side of the valve core 3, and a low-pressure oil return chamber 14 is provided on the other side of the valve core 3.

[0029] Seals are installed at the gap between the valve core 3 and the valve sleeve 4, and at the gap between the valve sleeve 4 and the valve body 1, to prevent leakage of high-pressure liquid and reduce wear.

[0030] The driving mechanism 9 is connected to the valve core 3 by an external power through a low-friction connection to reduce energy loss and wear during power transmission.

[0031] In this embodiment of the utility model, the valve body 1 serves as the main structure of the valve. A valve core groove 2 is defined within the valve core 3, providing space for rotation. The valve core 3 is a highly precision-machined cylindrical shape with a specially hardened surface for enhanced wear resistance. Flat grooves 5 are defined on the outer surface of the valve core 3. These flat grooves 5 are asymmetrically designed and correspond to the oil passage holes 6 within the valve sleeve 4. As the valve core 3 rotates, the flat grooves 5 can precisely align or offset the oil passage holes 6 in different directions, thereby controlling the flow of fluid.

[0032] A drive mechanism 9 is mounted on top of the valve core 3. This drive mechanism 9 can provide rotational power electrically, pneumatically, or manually. The drive mechanism 9 and valve core 3 are connected via a non-contact or low-friction connection to minimize energy loss and wear during power transmission. When a control signal is applied to the drive mechanism 9, the valve core 3 rotates smoothly, changing the flow path and achieving reversible flow.

[0033] During operation, when the valve core 3 is in the neutral position, the control oil inlet chamber 13 is isolated from the first and second control oil circuits 10, 11 by the assembly of the valve core 3 and the valve sleeve 4. At this point, the first and second control oil circuits 10, 11 are connected to the low-pressure oil return chamber 14 through a gap, creating a throttling effect, ensuring the stability of the hydraulic system's oil circuit and mitigating shock.

[0034] When the fluid flow direction needs to be switched, a control signal acts on the drive mechanism 9, driving the valve core 3 to rotate. When the control mechanism rotates clockwise, it drives the valve core 3 to rotate clockwise. As the valve core 3 rotates, the flat groove 5 gradually aligns with the oil channel hole 6, controlling the flow of oil inlet chamber 13 and the control oil port. At the same time, the gap between the low-pressure oil return chamber 14 and the first control oil circuit 10 gradually closes, ensuring that the fluid can only flow to the required part. When the drive mechanism 9 rotates counterclockwise, it drives the valve core 3 to rotate counterclockwise, achieving a similar switching process, but this time the fluid will flow to the second control oil circuit 11, which is different from the first control oil circuit 10.

[0035] Throughout operation, lubrication grooves 12 on the inner wall of the valve core 3 automatically collect and retain a small amount of lubricating oil, achieving self-lubrication. This not only ensures smooth and jerky rotation of the valve core 3 but also reduces wear caused by friction. Furthermore, the valve core 3, valve sleeve 4, and valve body 1 are all constructed of alloy, further enhancing the overall durability and service life of the valve.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary reversing valve structure, comprising a valve body (1), characterized in that: The inner cavity of the valve body (1) is provided with a valve core groove (2), a valve core (3) is rotatably connected in the inner cavity of the valve core groove (2), a valve sleeve (4) is sleeved on the outer side of the valve core (3), a flat groove (5) is provided on the outer side of the valve core (3), an oil passage hole (6) is provided in the inner cavity of the valve sleeve (4) and the position of the oil passage hole and the flat groove (5) are mutually corresponding, a second sealing member (8) is installed at the matching position of the valve core (3) and the valve sleeve (4), a first sealing member (7) is installed at the matching position of the valve sleeve (4) and the valve body (1), and a driving mechanism (9) is installed on the top of the valve core (3) to drive the valve core (3) to rotate; A first control oil circuit (10) and a second control oil circuit (11) are provided in the inner cavity of the valve body (1). The first control oil circuit (10) and the second control oil circuit (11) are respectively arranged on both sides of the valve core (3), and the oil circuits are connected or disconnected according to the rotation of the valve core (3).

2. A rotary reversing valve structure according to claim 1, characterized in that: The valve core (3) is a high-precision cylindrical shape with a hardened surface. The outer walls of the valve core (3) and the valve sleeve (4) are both provided with lubrication grooves (12) to automatically collect and retain a small amount of lubricating oil. The materials of the valve core (3), the valve sleeve (4) and the valve body (1) are all alloy materials.

3. A rotary reversing valve structure according to claim 1, characterized in that: A control oil inlet chamber (13) is provided on one side of the valve core (3), and a low-pressure oil return chamber (14) is provided on the other side of the valve core (3).

4. A rotary reversing valve structure according to claim 1, characterized in that: Seals are installed at the gap between the valve core (3) and the valve sleeve (4), and at the gap between the valve sleeve (4) and the valve body (1), to prevent leakage of high-pressure liquid and reduce wear.

5. The rotary reversing valve structure according to claim 1, characterized in that: The driving mechanism (9) is connected to the valve core (3) by external power through a low-friction connection method, so as to reduce energy loss and wear during power transmission.

6. The rotary reversing valve structure according to claim 1, characterized in that: The flat groove (5) is asymmetrically designed and is used to communicate with the oil channel hole (6) of the valve sleeve (4) to control the flow direction of the fluid.

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