Reversing valve

Abstract

The utility model relates to the technical field of hydraulic system control elements, in particular to a reversing valve which comprises a valve body, an oil suction path, a first oil path and a second oil path are arranged in the valve body, a through hole is formed in the valve body to form a reversing port, a reversing valve element is rotatably arranged in the reversing port, and a reversing ring groove and a guide groove are formed in the reversing valve element. And meanwhile, a first reversing hole and a second reversing hole are formed in the surface of the reversing valve element. In addition, a reversing handle is fixed to one end of the reversing valve element, a plurality of flow channels and a one-way valve are arranged in the valve body, and efficient circulation and reliable switching of oil liquid are guaranteed. The reversing device has the technical effects of small size and convenience in reversing.

Description

Technical Field

[0001] This application relates to the field of hydraulic system control components, and in particular to a directional valve. Background Technology

[0002] Three-position four-way directional control valves in hydraulic systems are key components for switching the direction of fluid flow and are widely used in various mechanical equipment. With the increasing level of industrial automation, the demand for directional control valves is constantly growing. Traditional three-position four-way directional control valves are widely used in industrial production due to their reliable performance and stable control capabilities. However, with the increasing trend of equipment miniaturization and integration, traditional large-volume directional control valves can no longer meet the needs of modern industrial development. Currently, common methods for achieving rapid switching of fluid flow direction include using manually rotated valve spools and electromagnetically driven valve spools. Manually rotated valve spools are typically operated directly by a handle and are suitable for low-frequency operations; while electromagnetically driven valve spools utilize the attraction force of an electromagnet to move the valve spool, suitable for high-frequency working environments. In addition, some designs use pneumatic or electric methods to drive the valve spool. While these methods increase operating speed, they also increase system complexity and cost.

[0003] While the above methods can achieve basic reversing functions, some problems still exist in practical applications. Especially in situations requiring frequent reversing, traditional large-volume reversing valves not only occupy a lot of space but are also inconvenient to operate, easily leading to low work efficiency. Therefore, how to reduce the size of the reversing valve and improve its reversing convenience has become an urgent technical challenge. Utility Model Content

[0004] To overcome the aforementioned technical problems, this application provides a reversing valve.

[0005] This application provides a reversing valve, which adopts the following technical solution:

[0006] A reversing valve includes a valve body, which has an oil suction passage, a first oil passage, and a second oil passage. A through hole is formed on the valve body to create a reversing port. A reversing valve core is rotatably disposed within the reversing port. The reversing valve core has an annular groove for oil flow, forming a reversing annular groove. The reversing valve core also has an elongated groove communicating with the reversing annular groove, forming a guide groove. Two identical guide grooves are spaced apart to form a first guide groove and a second guide groove. The interior of the reversing valve core is hollow, forming a valve core outlet. The valve core outlet communicates with the reversing port. Two identical through holes are formed on the surface of the reversing valve core facing the valve core outlet, forming a first reversing hole and a second reversing hole.

[0007] By adopting the above technical solutions, the overall structure of the directional valve is compact, reducing its size and improving the utilization of installation space. Meanwhile, the design of the directional valve core's directional ring groove and guide groove makes oil circuit switching more flexible and convenient, reducing resistance during the switching process and improving switching efficiency. The design of the first and second directional holes further optimizes the oil flow path, ensuring reliable connectivity between oil circuits and reducing the risk of leakage.

[0008] Preferably, a reversing handle is fixedly provided at one end of the reversing valve core that extends out of the valve body.

[0009] By adopting the above technical solution, the reversing handle allows users to manually rotate it to control the position of the reversing valve core, thereby quickly switching between different oil circuit states and improving the ease of operation and work efficiency of the equipment. At the same time, this design simplifies the reversing mechanism, helping to reduce the overall size of the reversing valve, making it more compact and lightweight.

[0010] Preferably, the valve body has an oil tank connection port, and the oil tank connection port has a thread.

[0011] By adopting the above technical solution, the oil tank connection port is threaded, which facilitates quick installation and disassembly with the external oil tank, and improves the convenience of maintenance and use.

[0012] Preferably, the oil suction path includes a flow channel formed inside the valve body, one end of which is connected to the oil tank connection port, and the other end is connected to the reversing ring groove. By adopting the above technical solution, the design of the oil suction channel allows oil to flow smoothly from the oil tank connection port into the reversing ring groove, ensuring a stable oil supply to the system, while simplifying the internal structure and reducing unnecessary space occupation.

[0013] Preferably, the first oil circuit includes a first pipe fixedly disposed within the valve body, and the second oil circuit includes a second pipe fixedly disposed within the valve body, wherein both the first pipe and the second pipe are connected to the outside of the valve body.

[0014] By adopting the above technical solution, the first oil circuit and the second oil circuit are respectively composed of a first pipe and a second pipe fixedly installed in the valve body, ensuring the stability and reliability of the oil circuit. At the same time, both the first pipe and the second pipe are connected to the outside of the valve body, allowing the system to be easily connected to other equipment, improving the system's flexibility and applicability.

[0015] Preferably, a first check valve and a second check valve are also fixedly installed inside the valve body. The first check valve is connected to the first pipeline, and the second check valve is connected to the second pipeline. By adopting the above technical solution, the first check valve and the second check valve effectively prevent oil backflow. The first check valve prevents the oil in the first oil circuit from flowing back towards the low-pressure side, while the second check valve prevents the oil in the second oil circuit from flowing back towards other parts of the system, thereby improving the safety and efficiency of the entire system.

[0016] Preferably, the first oil circuit further includes a first flow channel formed inside the valve body, the first flow channel being connected to the first check valve and the reversing valve core respectively, and the second oil circuit further includes a second flow channel formed inside the valve body, the second flow channel being connected to the second check valve and the reversing valve core respectively.

[0017] By adopting the above technical solution, the first and second flow channels added to the first and second oil circuits enable high-pressure oil and return oil to enter the reversing valve core more smoothly, ensuring the optimization of the oil flow path.

[0018] Preferably, the surface of the reversing valve core is provided with multiple annular grooves to form sealing annular grooves.

[0019] By adopting the above technical solution, the sealing annular groove formed by multiple annular grooves on the surface of the directional valve core can effectively improve the working reliability and sealing performance of the directional valve, reduce the leakage risk of the hydraulic system, and thus ensure the stability and safety of the system operation.

[0020] In summary, this application includes at least one of the following beneficial technical effects:

[0021] 1. The design of the reversing ring groove and guide groove on the reversing valve core makes the switching of the oil circuit during the reversing process smoother, reduces the pressure loss during reversing, and improves the reversing efficiency.

[0022] 2. By designing the reversing valve core as a hollow structure and setting multiple through holes, the overall volume is reduced while ensuring sufficient flow, thus meeting the requirements for equipment miniaturization.

[0023] 3. The design of the first and second guide grooves makes the operation of the reversing handle simpler, reduces the difficulty of operation, and improves the user experience. Attached Figure Description

[0024] Figure 1 This is the main view when the reversing handle is in the right position;

[0025] Figure 2 This is the main view when the reversing handle is positioned to the left;

[0026] Figure 3This is a three-dimensional view when the reversing handle is positioned to the left;

[0027] Figure 4 This is a perspective view of an embodiment of this application;

[0028] Figure 5 and Figure 6 This is a three-dimensional view of the reversing valve core;

[0029] Figure 7 This is the perspective front view when the reversing handle is positioned to the left.

[0030] Figure 8 This is the perspective left view when the reversing handle is in the left position;

[0031] Figure 9 This is the perspective left view when the reversing handle is in the right position.

[0032] Explanation of reference numerals in the attached drawings: 1. Valve body; 11. Reversing valve core; 111. First guide groove; 112. Second guide groove; 113. First reversing hole; 114. Second reversing hole; 115. Reversing ring groove; 116. Sealing ring groove; 117. Valve core outlet; 12. Reversing handle; 121. Limit bolt; 13. Reversing port; 14. First check valve; 15. Second check valve; 2. Oil tank connection port; 21. Oil suction channel; 31. First pipe; 32. First channel; 41. Second pipe; 42. Second channel. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0034] This application discloses a reversing valve, referring to... Figures 1 to 6The valve body includes a valve body 1, which has an oil suction passage, a first oil passage, and a second oil passage. A through hole is provided on the valve body 1 to form a reversing port 13. A reversing valve core 11 is rotatably installed in the reversing port 13. A reversing handle 12 is fixedly installed at one end of the reversing valve core 11 that extends out of the valve body 1. Limit bolts 121 are provided on both sides of the reversing handle 12. The limit bolts 121 are used to prevent safety hazards caused by misoperation. The reversing valve core 11 can be rotated by moving the reversing handle 12. The reversing valve core 11 is mainly used for reversing function. Specifically, the reversing valve core 11 has an annular groove for oil passage to form a reversing annular groove 115. The reversing valve core 11 also has a long groove connected to the reversing annular groove 115 to form a guide groove. Two identical guide grooves are spaced apart to form a first guide groove 111 and a second guide groove 112. When the oil flows to the reversing annular groove 115, it can fill the reversing annular groove 115 and flow into the first guide groove 111 and the second guide groove 112. The first guide groove 111 and the second guide groove 112 are opened in a direction away from the reversing annular groove 115. This configuration changes the flow direction of the oil. The reversing valve core 11 is hollow inside, forming a valve core outlet 117. The valve core outlet 117 is connected to the reversing port 13. By connecting the valve core outlet 117 to the reversing port 13, and since the reversing port 13 is connected to the outside of the valve body 1, the valve core outlet 117 can guide the oil in the valve body 1 to the outside. Two through holes of the same shape are opened on the surface of the reversing valve core 11 facing the valve core outlet 117, forming a first reversing hole 113 and a second reversing hole 114. The first reversing hole 113 and the second reversing hole 114 are connected through the valve core outlet 117. The opening angles of the first reversing hole 113 and the second reversing hole 114 are different. In this embodiment, the angle between the first reversing hole 113 and the second reversing hole 114 is 90 degrees.

[0035] Reference Figure 4 , Figure 7 , Figure 8 ,and Figure 9The valve body 1 has an oil tank connection port 2 with threads, allowing it to connect to an oil tank pipe. The oil suction path includes a flow channel 21 formed inside the valve body 1, with one end connected to the oil tank connection port and the other end connected to a reversing ring groove 115. The first oil path includes a first pipe 31 fixedly installed inside the valve body 1, and the second oil path includes a second pipe 41 fixedly installed inside the valve body 1. Both the first pipe 31 and the second pipe 41 are connected to the outside of the valve body 1. In this embodiment, the first pipe 31 and the second pipe 41 are arranged parallel to each other inside the valve body 1, and are used to drain oil from inside the valve body 1. A first check valve 14 and a second check valve 15 are also fixedly installed inside the valve body 1. The first check valve 14 is connected to the first pipe 31, and the second check valve 15 is connected to the second pipe 41. The first oil circuit also includes a first flow channel 32 opened inside the valve body 1. The first flow channel 32 is connected to the first check valve 14 and the reversing valve core 11 respectively. The second oil circuit also includes a second flow channel 42 opened inside the valve body 1. The second flow channel 42 is connected to the second check valve 15 and the reversing valve core 11 respectively. The first flow channel 32 and the second flow channel 42 are opened vertically downward inside the valve body 1 and are connected to the reversing port 13. This arrangement enables the first flow channel 32 and the second flow channel 42 to connect with the guide groove and the reversing hole when the reversing valve core 11 rotates.

[0036] The surface of the reversing valve core 11 is provided with multiple annular grooves to form a sealing annular groove 116. The sealing annular groove 116 is provided on both sides of the reversing groove, the first guide groove 111 and the second guide groove 112 to prevent the oil flowing into the reversing groove, the first guide groove 111 and the second guide groove 112 from flowing out.

[0037] The implementation principle of this application embodiment is as follows: by moving the reversing handle 12, the reversing valve core 11 can complete the reversing effect of two states.

[0038] When the reversing handle 12 is moved to the leftmost position, the oil circuit in the valve body 1 is connected as follows: the suction channel 21 is connected to the reversing ring groove 115, the first flow channel 32 is connected to the first reversing hole 113, and the second flow channel 42 is connected to the second guide groove 112. In this state, the oil has two flow paths. The first oil circuit has the following flow paths in sequence: oil tank connection port 2, suction channel 21, reversing ring groove 115, second guide groove 112, second flow channel 42, second check valve 15, and second pipe 41. The second oil circuit has the following flow paths in sequence: first pipe 31, first check valve 14, first flow channel 32, first reversing hole 113, valve core outlet 117, and reversing port 13.

[0039] When the reversing handle 12 is moved to the far right, the oil circuit in the valve body 1 is connected as follows: the suction channel 21 is connected to the reversing ring groove 115, the second channel 42 is connected to the second reversing hole 114, and the first channel 32 is connected to the first guide groove 111. In this state, the oil has two flow paths. The first oil circuit has the following flow paths in sequence: suction channel 21, reversing ring groove 115, first guide groove 111, first channel 32, first check valve 14, and first pipe 31. The second oil circuit has the following flow paths in sequence: second pipe 41, second check valve 15, second reversing hole 114, valve core outlet 117, and reversing port 13.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A reversing valve, characterized in that: The system includes a valve body (1), which contains an oil suction passage, a first oil passage, and a second oil passage. A through hole is provided on the valve body (1) to form a reversing port (13). A reversing valve core (11) is rotatably disposed within the reversing port (13). An annular groove for oil flow is provided on the reversing valve core (11) to form a reversing annular groove (115). A long groove communicating with the reversing annular groove (115) is also provided on the reversing valve core (11) to form a guide groove. The guide groove is provided with two identical guide grooves (111) and guide groove (112) spaced apart. The inside of the reversing valve core (11) is hollow to form a valve core outlet (117). The valve core outlet (117) is connected to the reversing port (13). The surface of the reversing valve core (11) facing the valve core outlet (117) has two through holes of the same shape to form a first reversing hole (113) and a second reversing hole (114).

2. A reversing valve according to claim 1, characterized in that: A reversing handle (12) is fixedly installed at one end of the reversing valve core (11) that extends out of the valve body (1).

3. A reversing valve according to claim 1, characterized in that: The valve body (1) has an oil tank connection port (2) inside, and the oil tank connection port (2) has a thread.

4. A reversing valve according to claim 3, characterized in that: The oil suction path includes a flow channel formed inside the valve body (1) to form an oil suction flow channel (21). One end of the oil suction flow channel (21) is connected to the oil tank connection port, and the other end is connected to the reversing ring groove (115).

5. A reversing valve according to claim 1, characterized in that: The first oil circuit includes a first pipe (31) fixedly installed inside the valve body (1), and the second oil circuit includes a second pipe (41) fixedly installed inside the valve body (1). Both the first pipe (31) and the second pipe (41) are connected to the outside of the valve body (1).

6. A reversing valve according to claim 5, characterized in that: The valve body (1) is also fixedly provided with a first check valve (14) and a second check valve (15). The first check valve (14) is connected to the first pipeline (31), and the second check valve (15) is connected to the second pipeline (41).

7. A reversing valve according to claim 6, characterized in that: The first oil circuit also includes a first flow channel (32) opened inside the valve body (1), the first flow channel (32) being connected to the first check valve (14) and the reversing valve core (11) respectively. The second oil circuit also includes a second flow channel (42) opened inside the valve body (1), the second flow channel (42) being connected to the second check valve (15) and the reversing valve core (11) respectively.

8. A reversing valve according to claim 1, characterized in that: The surface of the reversing valve core (11) is provided with multiple annular grooves to form a sealing annular groove (116).

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