Shuttle valve and multi-way valve using same
By employing a built-in structure and a spherical-conical seal in the shuttle valve, the problems of complex structure and large space occupation of the shuttle valve are solved, achieving the effects of simplified manufacturing and improved assembly efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-03-24
AI Technical Summary
Existing shuttle valves have complex structures, occupy a large space, and are inconvenient to assemble.
The valve adopts a built-in shuttle valve structure, which directly installs the valve core in the mounting groove of the valve body, eliminating the valve seat and valve sleeve. It uses the sealing fit of the spherical and conical surfaces to reduce the leakage rate, and realizes oil pressure comparison through the specific pressure groove.
The simplified shuttle valve structure reduces space occupation, improves assembly efficiency and sealing effect, and reduces leakage rate.
Smart Images
Figure CN224032857U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of load-sensitive multi-way valve technology, specifically to a shuttle valve and a multi-way valve using the shuttle valve. Background Technology
[0002] A shuttle valve is a linear-stroke valve that switches between multiple signals based on fluid pressure differences. Its main principle is to control the valve state by the fluid pressure difference across the valve core. When there is pressure at either of the two pressure inlets, the valve core moves, opening the high-pressure side and closing the low-pressure side, with the high-pressure side having priority for output.
[0003] In existing technology, shuttle valves mainly consist of a valve sleeve and a valve seat. The valve seat has a valve cavity in the middle. The valve sleeve and valve seat have a pressure inlet and a pressure outlet that communicate with the valve cavity. A valve core that can move and block the pressure inlet is also installed in the valve cavity. The shuttle valve composed of this valve sleeve, valve seat, and valve core has a relatively complex structure, occupies a large space, and is inconvenient to assemble. Utility Model Content
[0004] To address the aforementioned problems, this utility model provides a shuttle valve and a multi-way valve using the shuttle valve, thereby solving the problems of the complex structure, large space occupation, and inconvenience in assembly of existing shuttle valves.
[0005] This utility model is achieved using the following technical solution: a shuttle valve, comprising a valve body, characterized in that a mounting groove is provided on the right side of the valve body, the right side of the valve body can be installed with other mounting bodies to form a valve cavity, a first pressure inlet is provided on the left side of the mounting groove, a pressure groove communicating with a second pressure inlet is provided on the right side of the valve body located in the mounting groove, the pressure groove can cooperate with the mounting body on the right side of the valve body to form a pressure cavity, a valve core for sealing the first pressure inlet or the second pressure inlet is installed in the mounting groove, the right side of the valve core is located in the pressure groove and is opposite to the second pressure inlet, and a pressure outlet communicating with the first pressure inlet or the second pressure inlet is also provided at the bottom of the mounting groove.
[0006] With the above structure, the shuttle valve in this device is a built-in shuttle valve, that is, the valve body on which it is installed serves as the valve sleeve. An installation groove is set on the valve body, and the valve core is directly installed in the installation groove. Compared with shuttle valves with independent valve seats, valve sleeves, and valve cores, the structure of this device is simpler and easier to manufacture.
[0007] Preferably, a sealing block is fixedly installed on the left side of the valve core. The sealing block has a first sealing surface on its side, which is spherical. A second sealing surface is provided on the left side of the mounting groove, which is conical. The flare of the second sealing surface faces to the right, and the first pressure inlet is located on the left side of the second sealing surface. Through the sealing fit between the spherical and conical surfaces, the contact stress distribution between the first and second sealing surfaces is more uniform, effectively reducing the leakage rate.
[0008] Preferably, the valve core has a pressure groove on its right side, and the side of the pressure groove is conical. The pressure groove allows for greater stability when comparing the pressure on the left and right sides of the valve core.
[0009] Preferably, both the mounting groove and the pressure groove are cylindrical grooves, with the diameter of the pressure groove being larger than that of the mounting groove. A first sealing ring is installed inside the pressure groove. The first sealing ring prevents oil leakage between the valve body and the mounting body during installation, thus preventing a reduction in the shuttle valve's performance.
[0010] Preferably, the valve core does not contact the annular side of the mounting groove, and the pressure outlet is located on the left side of the bottom of the mounting groove. Because the valve core does not contact the annular side of the mounting groove, when the oil pressure at the second pressure inlet is greater than that at the first pressure inlet, the oil at the second pressure inlet can flow along the gap between the valve core and the mounting groove to the pressure outlet.
[0011] Preferably, the valve core and the sealing block are integrally formed. This integral forming of the valve core and sealing block makes the structure of the device simpler and more stable.
[0012] A multi-way valve includes an inlet / outlet oil connection, a tail connection, and several reversing connections. The reversing connections include the shuttle valve mentioned above. The valve body has an oil chamber. A first pressure inlet is connected to the oil chamber through a second LS oil passage. The valve body also has a first LS oil passage connected to a pressure outlet. The second pressure inlet is located on the left side of the adjacent mounting body on the right side of the shuttle valve's corresponding reversing connection. The second pressure inlet is connected to the adjacent pressure outlet on the right side.
[0013] With the above structure, the shuttle valve in the utility model is built-in, that is, an installation groove and a pressure groove are directly set on the valve body of the reversing coupling, and then the valve core is directly inserted. Subsequently, multiple reversing couplings can be installed, making the installation of this device more convenient.
[0014] Preferably, several of the reversing couplings are located between the inlet / outlet oil coupling and the tail coupling; it also includes a confluence valve located between two of the reversing couplings. The right side of the confluence valve is provided with a connecting groove that communicates with the first LS oil passage of the right reversing coupling. The confluence valve is also provided with a third LS oil passage. The right end of the third LS oil passage communicates with the connecting groove, and the left end communicates with the pressure groove of the left reversing coupling. When the mounting body on the left side of the reversing coupling is a confluence valve, the second pressure inlet is the left end of the third LS oil passage. By setting the third LS oil passage, the oil pressure in the first LS oil passage of the right reversing coupling of the confluence valve can flow into the pressure groove of the left reversing coupling of the confluence valve along the third LS oil passage, thereby performing pressure comparison and selecting the oil pressure used for higher pressure.
[0015] Preferably, a second sealing ring is installed in the connecting groove. The second sealing ring prevents oil from leaking out through the gap between the confluence valve and the reversing coupling, thus avoiding affecting the normal screening pressure of the shuttle valve.
[0016] Preferably, when the mounting body on the right side of the reversing coupling is the reversing coupling itself, the second pressure inlet is located at the left end of the first LS oil passage of the right reversing coupling. By setting the second pressure inlet at the left end of the first LS oil passage of the reversing coupling, the oil pressure output by the shuttle valve in this reversing coupling and the pressure outlet of the right reversing coupling can be compared, thereby selecting the oil with the higher pressure.
[0017] In summary, the beneficial effects of this utility model are as follows:
[0018] 1. By directly setting the mounting groove on the valve body and forming a valve cavity with other mounting bodies, and installing a valve core that can block the first pressure inlet or the second pressure inlet in the valve cavity, the overall structure of the shuttle valve is formed. That is, when processing this device, only a groove needs to be set on the valve body, and then a valve core needs to be processed separately. The mechanism is simple, easy to manufacture, and has good economic benefits. Moreover, since there is no valve seat and valve sleeve, the shuttle valve in this device occupies less space.
[0019] 2. By applying this shuttle valve to the multi-way valve, the installation of the multi-way valve is simple: just place the valve core in the mounting groove of the multi-way valve body, and then install multiple reversing couplings together, positioning them between the inlet / return oil coupling and the tail coupling. This allows for the assembly of the multi-way valve. Compared to the valve seat / sleeve type shuttle valve, which requires the valve sleeve to be installed in the valve body of the reversing coupling through threaded connection or other means, the shuttle valve in this device is much easier to install, thus improving the overall assembly efficiency of the multi-way valve. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the overall structure of the shuttle valve in this utility model;
[0021] Figure 2 This is a schematic diagram showing the usage of a shuttle valve in a multi-way valve.
[0022] Figure 3 for Figure 2 A magnified view of a portion of area "A" in the image.
[0023] In the diagram: 1-Valve body; 2-Pressure groove; 3-Valve core; 4-Specific pressure groove; 5-Mounting groove; 6-Sealing block; 7-First sealing surface; 8-Second sealing surface; 9-First pressure inlet; 10-Pressure outlet; 11-Inlet / return oil connection; 12-Reversing connection; 13-Tail connection; 14-First LS oil passage; 15-Oil chamber; 16-First sealing ring; 17-Second pressure inlet; 18-Second LS oil passage; 19-Merging valve; 20-Third LS oil passage; 21-Connecting groove; 22-Second sealing ring. Detailed Implementation
[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0025] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0026] The following is a description of preferred embodiments of the present invention in conjunction with the accompanying drawings.
[0027] like Figure 1 , Figure 3 As shown, this utility model provides a shuttle valve, including a valve body 1. The right side of the valve body 1 is provided with a mounting groove 5, which can be installed with other mounting bodies to form a valve cavity. The left side of the mounting groove 5 is provided with a first pressure inlet 9. The valve body 1 is provided with a pressure groove 2 on the right side of the mounting groove 5, which communicates with a second pressure inlet 17. The pressure groove 2 communicates with the mounting groove 5 and can cooperate with the mounting body on the right side of the valve body 1 to form a pressure cavity. A valve core 3 for blocking the first pressure inlet 9 or the second pressure inlet 17 is installed in the mounting groove 5. The right side of the valve core 3 is located in the pressure groove 2 and aligned with the second pressure inlet 17. The bottom of the mounting groove 5 is also provided with a pressure outlet 10 that can communicate with the first pressure inlet 9 or the second pressure inlet 17.
[0028] The mounting body described above can be likened to a cover plate, on which a second pressure inlet 17 for conveying oil is provided. When the valve body 1 is installed together with the cover plate, the second pressure inlet 17 will be aligned with the right side of the valve core 3.
[0029] A sealing block 6 is fixedly installed on the left side of the valve core 3. The sealing block 6 has a first sealing surface 7 on its side, which is spherical. A second sealing surface 8 is located on the left side of the mounting groove 5, which is conical. The flare of the second sealing surface 8 faces to the right, and the first pressure inlet 9 is located to the left of the second sealing surface 8. The cooperation between the spherical first sealing surface 7 and the conical second sealing surface 8 ensures a high degree of uniformity in contact, which helps improve the sealing effect.
[0030] To better compare the oil pressure from the second pressure inlet 17 with the oil pressure from the first pressure inlet 9, a specific pressure groove 4 is provided on the right side of the valve core 3. The side of the specific pressure groove 4 is conical, and its flare direction is to the right. The second pressure inlet 17 is positioned opposite the specific pressure groove 4, either at its edge or its center, depending on its location. Therefore, when oil is output from the second pressure inlet 17, an oil pressure is first formed at the specific pressure groove 4, facilitating comparison with the oil pressure at the first pressure inlet 9 for oil pressure selection.
[0031] As a further illustration of this example, both the mounting groove 5 and the pressure groove 2 are cylindrical grooves. The axes of the mounting groove 5 and the pressure groove 2 coincide, and the diameter of the pressure groove 2 is larger than that of the mounting groove 5. A first sealing ring 16 is installed inside the pressure groove 2. The first sealing ring 16 can prevent oil from leaking out from the gap between the valve body 1 and the mounting body when installed with other mounting bodies, thereby reducing the oil pressure transmitted from the second pressure inlet 17 and affecting the accuracy of shuttle valve screening.
[0032] If the oil pressure transmitted from the second pressure inlet 17 is high, the shuttle valve will output the oil input from the second pressure inlet 17 to the pressure outlet 10. To ensure the oil can flow from the second pressure inlet 17 to the pressure outlet 10, the valve core 3 is designed not to contact the annular side of the mounting groove 5; that is, a gap is provided between the valve core 3 and the annular side of the mounting groove 5 for the oil to pass through. The pressure outlet 10 is located on the left side of the bottom of the mounting groove 5.
[0033] As a further illustration of this example, the valve core 3 and the sealing block 6 are integrally formed. This integral forming design makes the device easier to process and install, suitable for mass production, and offers better economic benefits.
[0034] like Figure 2 , Figure 3As shown, this utility model also provides a multi-way valve using the aforementioned shuttle valve, including an inlet / return oil coupler 11, a tail coupler 13, and several reversing couplers 12. The reversing couplers 12 are located between the inlet / return oil coupler 11 and the tail coupler 13, primarily assembling the several reversing couplers 12 with the inlet / return oil coupler 11 via the tail coupler 13. This is prior art; multi-way valves typically include an inlet / return oil coupler 11, a reversing coupler 12, and a tail coupler 13, though the names may differ, their functions are similar. For example, regardless of the structure, the main function of the reversing coupler 12 is to connect to the actuator to control its operation. Since the specific structures of the inlet / return oil coupler 11, the tail coupler 13, and the reversing coupler 12 are not the main inventive point of this utility model, the main inventive point lies in the installation relationship between the multi-way valve and the shuttle valve. Those skilled in the art can easily learn the specific structures of the inlet / return oil coupler 11, the tail coupler 13, and the reversing coupler 12 from books and patents in this field, therefore, they will not be described in detail.
[0035] In this embodiment, the reversing coupling 12 includes the aforementioned shuttle valve, specifically, the valve body 1 of the shuttle valve is the valve body of the reversing coupling 12. The valve body 1 also contains an oil chamber 15. The oil in this oil chamber 15 is primarily used to control the actuator, which is conventional prior art, and its structure will not be described in detail. The first pressure inlet 9 communicates with the oil chamber 15 via the second LS oil passage 18. The valve body 1 also has a first LS oil passage 14 communicating with the pressure outlet 10, extending to the leftmost end of the valve body 1. The second pressure inlet 17 is located on the left side of the adjacent mounting body on the right side of the shuttle valve corresponding to the reversing coupling 12, and is connected to the nearest pressure outlet 10 on the right side.
[0036] In multi-way valves, some consist of an inlet / return oil coupling 11, a reversing coupling 12, and a tail coupling 13, while others also include a merging valve 19. The merging valve 19 is also a conventional existing technology, and its specific structure will not be described in detail. When the multi-way valve includes the merging valve 19, since the merging valve 19 is installed between the two reversing couplings 12, the mounting body on the right side of the shuttle valve will have two possibilities: one is that the mounting body is the merging valve 19, and the other is another reversing coupling 12.
[0037] When the mounting body is a confluence valve 19: The right side of the confluence valve 19 is provided with a connecting groove 21 that communicates with the first LS oil passage 14 of the right reversing coupling 12. The confluence valve 19 is also provided with a third LS oil passage 20. The right end of the third LS oil passage 20 communicates with the connecting groove 21, and the left end communicates with the pressure groove 2 of the left reversing coupling 12. That is, when the mounting body on the right side of the reversing coupling 12 is the confluence valve 19, the second pressure inlet 17 of the shuttle valve on the reversing coupling 12 is the left end of the third LS oil passage 20.
[0038] In order to prevent oil from leaking out from the gap between the connecting groove 21 and the right reversing coupling 12 and affecting the subsequent pressure comparison, a second sealing ring 22 is installed in the connecting groove 21.
[0039] When the mounting body corresponding to the right side of the shuttle valve is also the reversing coupling 12, the second pressure inlet 17 is the left end of the first LS oil passage 14 of the right reversing coupling 12.
[0040] As a further illustration of this example, Figure 2 The rightmost reversing coupling 12 also has a valve core and other shuttle valve structure, but it does not have a pressure screening function. It has this structure only because of the mass production of reversing coupling 12.
[0041] The operating principle of this device is as follows: When the shuttle valve transmits oil through the second pressure inlet 17, an oil pressure transmitted from the second pressure inlet 17 is generated on the right side of the valve core 3. There is also oil pressure in the oil chamber of the reversing coupling 12 where the shuttle valve is located. This oil pressure is transmitted to the left side of the blocking block 6 through the second LS oil passage 18 and the first pressure inlet 9. A comparison is made between the two pressures. When the oil pressure at the first pressure inlet 9 is greater than the oil pressure at the second pressure inlet 17, the valve core 3 moves to the right, blocking the second pressure inlet 17. The pressure outlet 10 and the first pressure inlet 9... The oil pressure transmitted to the shuttle valve of the next reversing coupling 12 is the oil pressure at the first pressure inlet 9. When the oil pressure at the second pressure inlet 17 is greater than the oil pressure at the first pressure inlet 9, the valve core 3 moves to the left, the sealing block 6 blocks the first pressure inlet 9, and the pressure outlet 10 connects with the second pressure inlet 17. Thus, the oil pressure transmitted to the shuttle valve of the next reversing coupling 12 is the oil pressure at the second pressure inlet 17. This achieves pressure screening and transmits the highest pressure signal in the multi-way valve to the flow pump for subsequent multi-way valve pressure adjustment and distribution.
[0042] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.
Claims
1. A shuttle valve, comprising a valve body (1), characterized in that, The valve body (1) has an installation groove (5) on its right side. The right side of the valve body (1) can be installed with other installation bodies to form a valve cavity in the installation groove (5). The left side of the installation groove (5) has a first pressure inlet (9). The valve body (1) is located on the right side of the installation groove (5) and has a pressure groove (2) that communicates with the second pressure inlet (17). The pressure groove (2) can cooperate with the installation body on the right side of the valve body (1) to form a pressure cavity. A valve core (3) for sealing the first pressure inlet (9) or the second pressure inlet (17) is installed in the installation groove (5). The right side of the valve core (3) is located in the pressure groove (2) and is opposite to the second pressure inlet (17). The bottom of the installation groove (5) also has a pressure outlet (10) that communicates with the first pressure inlet (9) or the second pressure inlet (17).
2. The shuttle valve according to claim 1, characterized in that, A sealing block (6) is fixedly installed on the left side of the valve core (3). The sealing block (6) has a first sealing surface (7) on its side. The first sealing surface (7) is spherical. A second sealing surface (8) is provided on the left side of the mounting groove (5). The second sealing surface (8) is conical. The flare of the second sealing surface (8) faces to the right. The first pressure inlet (9) is located on the left side of the second sealing surface (8).
3. The shuttle valve according to claim 1, characterized in that, The valve core (3) has a pressure groove (4) on its right side, and the side of the pressure groove (4) is a cone.
4. The shuttle valve according to claim 1, characterized in that, The mounting groove (5) and the pressure groove (2) are both cylindrical grooves. The diameter of the pressure groove (2) is larger than that of the mounting groove (5). A first sealing ring (16) is installed in the pressure groove (2).
5. The shuttle valve according to claim 4, characterized in that, The valve core (3) does not contact the annular side of the mounting groove (5), and the pressure outlet (10) is located on the left side of the bottom of the mounting groove (5).
6. The shuttle valve according to claim 2, characterized in that, The valve core (3) and the sealing block (6) are integrally formed.
7. A multi-way valve, comprising an inlet / return oil connection (11), a tail connection (13), and a plurality of reversing connections (12), wherein the reversing connections (12) include a shuttle valve as described in any one of claims 1-6, characterized in that, The valve body (1) is provided with an oil chamber (15). The first pressure inlet (9) is connected to the oil chamber (15) through the second LS oil passage (18). The valve body (1) is also provided with a first LS oil passage (14) connected to the pressure outlet (10). The second pressure inlet (17) is located on the left side of the adjacent mounting body on the right side of the shuttle valve corresponding to the reversing coupling (12). The second pressure inlet (17) is connected to the adjacent pressure outlet (10) on the right side.
8. The multi-way valve according to claim 7, characterized in that, Several of the aforementioned reversing couplings (12) are located between the inlet / outlet oil coupling (11) and the tail coupling (13); it also includes a confluence valve (19) located between two of the reversing couplings (12), the right side of the confluence valve (19) is provided with a connecting groove (21) that communicates with the first LS oil passage (14) of the right reversing coupling (12), the confluence valve (19) is also provided with a third LS oil passage (20), the right end of the third LS oil passage (20) communicates with the connecting groove (21), and the left end communicates with the pressure groove (2) of the left reversing coupling (12). When the mounting body corresponding to the right side of the shuttle valve is the confluence valve (19), the second pressure inlet (17) of the shuttle valve is the left end of the third LS oil passage (20).
9. The multi-way valve according to claim 8, characterized in that, A second sealing ring (22) is installed in the connecting groove (21).
10. The multi-way valve according to claim 7, characterized in that, When the mounting body corresponding to the right side of the shuttle valve is the reversing coupling (12), the second pressure inlet (17) of the shuttle valve is the left end of the first LS oil passage (14) of the right reversing coupling (12).