A multi-way valve

Abstract

This utility model discloses a multi-way valve, belonging to the field of multi-way valve technology. It includes a valve body assembly comprising multiple valve body seats and end valve seats disposed at both ends of the valve body seats. Each valve body seat has an adjustment chamber containing a sliding valve stem. An input port is located in the middle of each valve body seat, and three ports are located below the input port. An oil inlet is located on each end valve seat. Ports one, three, and the input port are respectively connected to the inlet. Port two is connected to an external liquid storage tank. The valve stem moves to connect port one to port two. The valve stem can dynamically adjust the flow rate by floating left and right. When the hydraulic actuator encounters resistance, the valve stem can adaptively move with the load, breaking the inherent problem of rigid resistance caused by constant flow and avoiding violent rigid collisions between the actuator and the resistance source.

Description

Technical Field

[0001] This utility model relates to the field of multi-way valve technology, and in particular to a multi-way valve. Background Technology

[0002] In fields such as construction machinery and industrial automation, multi-way valves serve as core control components. By proportionally adjusting and coordinating the flow of multiple channels, they enable precise movements of hydraulic actuators (such as hydraulic cylinders and hydraulic motors), making them crucial equipment for ensuring efficient operation under complex conditions. Their performance directly impacts the equipment's operating efficiency, accuracy, and stability. Especially in scenarios involving multiple actuators working in tandem, rapid response to external operational commands is required to complete complex actions such as excavation, assembly, and material handling through flow distribution. In existing technologies, when an actuator encounters resistance during rapid operation, the multi-way valve maintains its original flow input. This forcibly halts the actuator's rapid movement, creating a vicious cycle of "jamming-impact." A violent, rigid collision occurs between the actuator and the resistance source, and the reaction force is transmitted in the reverse direction along the hydraulic lines to the multi-way valve and power source. This not only leads to structural deformation of the actuator, wear on the multi-way valve core, and cracking of the valve body, but also causes a sharp rise in system pressure. This may trigger frequent start-stop or failure of overload protection devices, leading to safety hazards such as pipe bursts and oil leaks. Utility Model Content

[0003] The purpose of this invention is to solve the problem mentioned in the background art, where the rapid movement of the actuator is forcibly blocked and a violent rigid collision occurs between the actuator and the resistance source because the multi-way valve still maintains the original flow input.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A multi-way valve includes a valve body assembly, which includes multiple valve body seats and end valve seats disposed at both ends of the multiple valve body seats. Each valve body seat has an adjustment chamber, and a sliding valve stem is disposed within the adjustment chamber. An inlet is disposed in the middle of each valve body seat, and three ports are disposed below the inlet. An oil inlet is disposed on each end valve seat. Ports one, three, and the inlet are respectively connected to the inlet. Port two is connected to an external liquid storage tank. The valve stem moves to connect port one to port two.

[0005] Preferably, a connecting hole is provided on the upper side of the input port, and a flow channel one and a flow channel two are provided on both sides of the connecting hole. The flow channel one and the flow channel two are connected to the input port through the connecting hole. The flow channel one and the flow channel two are symmetrically arranged about the input port. The valve body seat is provided with an output chamber and an input chamber that connect the regulating chamber.

[0006] Preferredly, the valve stem has, from right to left, adjustment part one, adjustment part two, adjustment part three, adjustment part four and adjustment part five, which are contact adjustment chambers. The end of adjustment part two near the port two is provided with a through groove one.

[0007] Preferably, the adjustment section three is located between port three and port two.

[0008] Preferably, the adjustment part four is provided with a through groove two at one end near the through port three, and the through port three and the flow channel two are connected through the through groove two.

[0009] Preferably, the valve body seat has an outlet channel, and the input cavity is connected to the outlet channel.

[0010] Preferably, a housing is installed on the valve body seat, and an end cap and an abutment cap are provided inside the housing. The abutment cap is sleeved on the end of the valve stem. A spring is provided in the housing, and the two ends of the spring abut against the end cap and the abutment cap, respectively.

[0011] Preferably, a vertical groove is provided on the valve body seat, and a sealing head for blocking the connecting hole is provided in the vertical groove. A sealing cap is threaded to the top of the vertical groove, and a second spring is provided in the vertical groove. The two ends of the second spring are respectively connected to the sealing cap and the sealing head.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The valve stem can dynamically adjust the flow rate by floating left and right: when the hydraulic actuator encounters resistance, the valve stem can move adaptively with the load change, breaking the inherent problem of rigid blockage caused by constant flow and avoiding violent rigid collision between the actuator and the resistance source. By coordinating the through groove one and through groove two on the valve stem and the adjustment part, it is ensured that the liquid can quickly flow back to the storage tank through the outflow channel in case of overload, avoiding pressure accumulation, reducing safety hazards such as pipeline bursts and oil leaks, and reducing the frequent start and stop of the overload protection device. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0015] Figure 2 This is a schematic diagram of the valve body seat and end valve seat of this utility model.

[0016] Figure 3This is a schematic diagram of the input port and inlet of this utility model.

[0017] Figure 4 This is a schematic diagram of the internal structure of the valve body seat of this utility model.

[0018] Figure 5 This is a schematic diagram of the adjustment cavity of this utility model.

[0019] Figure 6 This is a schematic diagram of the valve stem of this utility model.

[0020] Drawing number explanation: 1. Valve body assembly; 2. Valve body seat; 21. Adjusting chamber; 22. Inlet; 23. Through port one; 24. Through port two; 25. Through port three; 26. Flow channel one; 27. Flow channel two; 28. Output chamber; 29. ​​Inlet chamber; 210. Connecting hole; 211. Vertical groove; 212. Outlet channel; 3. End valve seat; 31. Inlet; 4. Valve stem; 41. Adjusting part one; 42. Adjusting part two; 43. Adjusting part three; 44. Adjusting part four; 45. Adjusting part five; 46. Through groove one; 47. Through groove two; 48. Through groove three; 5. Housing; 51. End cap; 52. Abutment cap; 53. Spring one; 6. End cap; 7. Cover; 8. Spring two. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0023] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0024] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0025] Please see Figure 1 - Figure 6 A multi-way valve includes a valve body assembly 1, which comprises multiple valve body seats 2 and end valve seats 3 disposed at both ends of the valve body seats 2. Each valve body seat 2 has an adjusting cavity 21, within which a sliding valve stem 4 is disposed. A housing 5 is mounted on the valve body seat 2 and is fixed to the valve body seat 2 by bolts. An end cap 51 and an abutment cap 52 are disposed within the housing 5. The abutment cap 52 is fitted onto the end of the valve stem 4. A spring 53 is disposed within the housing 5, with its two ends abutting against the end cap 51 and the abutment cap 52, respectively. The spring 53 presses the end cap 51 against the inner wall of the housing 5.

[0026] An inlet 22 is provided in the middle of the valve body seat 2. The pump body allows liquid to enter the inlet 31 through a pipe and then into the inlet 22. Below the inlet 22 are three ports: port 1 23, port 24, and port 3 25. An oil inlet 31 is provided on the end valve seat 3. Ports 1 23, port 3 25, and inlet 22 are connected to the inlet 31. Port 2 24 is connected to an external liquid storage tank (not shown). The valve stem 4 moves to connect port 1 23 with port 2 24, at which point port 3 25 is connected to flow channel 2 27. Figure 3 As shown, port 23 and port 23 extend to the back of port 24 to connect, and then connect to inlet 31. A connecting hole 210 is provided on the upper side of the inlet 22. Flow channels 26 and 27 are provided on both sides of the connecting hole 210. Flow channels 26 and 27 are connected to the inlet 22 through the connecting hole 210. The connecting hole 210 is used to connect flow channels 26 and 27. Flow channels 26 and 27 are symmetrically arranged about the inlet 22. The valve body seat 2 has an output chamber 28 and an input chamber 29 that connect to the regulating chamber 21. A vertical groove 211 is provided on the valve body seat 2. A sealing head 6 is provided in the vertical groove 211 to block the connecting hole 210. A cap 7 is threaded to the top of the vertical groove 211. A spring 8 is provided in the vertical groove 211, and its two ends are connected to the cap 7 and the sealing head 6, respectively. When liquid enters the inlet 22, the sealing head 6 moves upward, allowing flow channels 26 and 27 to connect with the inlet 22. As the liquid enters inlet 22, it also enters outlet 1 23 and outlet 3 25. Outlet 1 23 enters outlet 24 through narrow channel channel 1 46, and then flows from outlet 2 24 to the external liquid storage tank. Outlet 3 25 and channel 2 27 are both inlet ends, so they are kept in circulation.

[0027] The valve stem 4 has, from right to left, five adjusting parts: adjusting part 41 (contact adjusting chamber 21), adjusting part 42 (contact adjusting part 23), adjusting part 44 (contact adjusting chamber 24), and adjusting part 45 (contact adjusting chamber 21). Adjusting part 42 has a through groove 46 near the end of the through-port 24, which connects through-port 23 and through-port 24. Adjusting part 43 is located between through-port 25 and through-port 24, preventing through-port 24 from connecting with through-port 25. Both adjusting part 41 and adjusting part 45 have through grooves 48.

[0028] A through groove 47 is provided at one end of the regulating section 44 near the port 25, and the port 25 and the flow channel 27 are connected through the through groove 47. An outlet channel 212 is provided on the valve body seat 2, which is connected to an external liquid storage tank. The input chamber 29 is connected to the outlet channel 212. When the valve stem 4 moves to the left, the port 23 and port 24 are connected, the port 25 and flow channel 27 are connected, and the flow channel 26 is connected to the output chamber 28. The input chamber 29 is connected to the outlet channel 212. Liquid entering the input chamber 29 enters the outlet channel 212 between the regulating section 44 and the regulating section 45, and then flows out into the external liquid storage tank.

[0029] It should be noted that the flow channel of through-slot 46 is small. Under the load of the hydraulic actuator, the liquid enters through-port 24 under pressure and then flows to the external liquid storage tank, thereby achieving the purpose of regulating the flow rate.

[0030] In operation, the valve stem 4 moves, moving the contact cap 52 along with it. Spring 53 is compressed. When the contact cap 52 contacts the end cap 51, flow channel 26 connects to the output chamber 28, and flow channel 27 connects to port 25. The pump body delivers liquid to the inlet 22 through a pipe, causing the end cap 6 to move upwards, connecting flow channel 26 and flow channel 27 to the inlet 22. Simultaneously, liquid enters ports 23 and 25. Liquid then flows through flow channel 26, exits through the output chamber 28, and acts on the hydraulic actuator. Liquid on the hydraulic actuator enters the input chamber 29, then the outlet channel 212, and finally into the external storage tank. At this time, ports 23 and 24 are connected, and port 25 is connected to flow channel 27. When the hydraulic actuator is under severe load, the valve stem 4 will float left and right to regulate the flow rate and prevent overload.

[0031] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A multi-way valve characterized by, The system includes a valve body assembly (1), which includes multiple valve body seats (2) and end valve seats (3) disposed at both ends of the multiple valve body seats (2). The valve body seats (2) are provided with an adjustment chamber (21), and a sliding valve rod (4) is disposed in the adjustment chamber (21). An inlet (22) is provided in the middle of the valve body seat (2). A port one (23), a port two (24), and a port three (25) are provided on the lower side of the inlet (22). An oil inlet (31) is provided on the end valve seat (3). The port one (23), the port three (25), and the inlet (22) are respectively connected to the inlet (31). The port two (24) is connected to an external liquid storage tank. The valve rod (4) is moved to connect the port one (23) and the port two (24).

2. A multi-way valve according to claim 1, characterized in that: The upper side of the input port (22) is provided with a connecting hole (210). A flow channel one (26) and a flow channel two (27) are provided on both sides of the connecting hole (210). The flow channel one (26) and the flow channel two (27) are connected to the input port (22) through the connecting hole (210). The flow channel one (26) and the flow channel two (27) are symmetrically arranged about the input port (22). The valve body seat (2) is provided with an output chamber (28) and an input chamber (29) that connect to the regulating chamber (21).

3. A multi-way valve according to claim 2, characterized in that: The valve stem (4) has, from right to left, adjustment part one (41), adjustment part two (42), adjustment part three (43), adjustment part four (44) and adjustment part five (45) that contact adjustment cavity (21). The adjustment part two (42) has a through groove one (46) at one end near the through port two (24).

4. A multi-way valve according to claim 3, characterized in that: The adjustment section three (43) is located between the three openings (25) and the two openings (24).

5. A multi-way valve according to claim 4, characterized in that: The adjustment section four (44) is provided with a through groove two (47) at one end near the through port three (25), and the through port three (25) and the flow channel two (27) are connected through the through groove two (47).

6. A multi-way valve according to claim 5, characterized in that: The valve body seat (2) has an outlet channel (212), and the input cavity (29) is connected to the outlet channel (212).

7. A multi-way valve according to claim 1, characterized in that: A housing (5) is installed on the valve body seat (2). An end cap (51) and an abutment cap (52) are provided inside the housing (5). The abutment cap (52) is sleeved on the end of the valve stem (4). A spring (53) is provided on the housing (5). The two ends of the spring (53) abut against the end cap (51) and the abutment cap (52) respectively.

8. A multi-way valve according to claim 1, characterized in that: The valve body seat (2) is provided with a vertical groove (211), and a sealing head (6) for blocking the connecting hole (210) is provided in the vertical groove (211). A sealing cap (7) is threaded to the top of the vertical groove (211), and a second spring (8) is provided in the vertical groove (211). The two ends of the second spring (8) are respectively connected to the sealing cap (7) and the sealing head (6).

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