A rotary diverter valve

Abstract

This application discloses a rotary reversing valve that solves the technical problem that the right-angle bend in the flow channel design of existing large-diameter pipeline reversing valves increases media resistance and reduces media conveying efficiency. The fixed valve body and rotating valve body of this rotary reversing valve cooperate to connect the media inlet and outlet to different through holes, thereby achieving the connection, disconnection, or change of the flow direction of the media. Furthermore, the axis of the first inclined tube and the axis of the through hole, as well as the axis of the second inclined tube and the axis of the through hole, are both greater than 90° and less than 180°, reducing the resistance of the flow channel and thus improving the media conveying efficiency.

Description

Technical Field

[0001] This application belongs to the field of valve body technology, specifically relating to a rotary directional valve. Background Technology

[0002] A hydraulic directional valve is a hydraulic control element mainly used to control the flow direction of oil in a hydraulic system, thereby changing the direction of motion of the actuator. The hydraulic directional valve controls the start, stop or change the direction of oil flow by moving the valve core in the valve body.

[0003] Currently, common directional control valves have multiple oil passages. In order to change the direction of oil flow, right-angle bends are usually designed in the valve body. These right-angle bends increase the resistance of the oil passages, causing the temperature of the flowing oil to rise. Especially for high-flow directional control valves, right-angle bends not only increase the resistance of the oil passages, leading to a decrease in media transport efficiency, but also cause water hammer effect, increasing vibration and noise, and affecting the working environment. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides a rotary directional valve to solve the technical problem that the design of the right-angle bend flow channel in the existing large-diameter pipeline directional valve increases the medium resistance and reduces the medium transport efficiency.

[0005] The technical solution adopted to achieve the purpose of this application is as follows:

[0006] A rotary directional valve, comprising:

[0007] A fixed valve body is used for media transfer. The fixed valve body is provided with four through holes, which are arranged around the center of the fixed valve body. The axis of the through holes is parallel to the center line of the fixed valve body.

[0008] A rotary valve body is used to switch the connectivity state of the through holes. The rotary valve body is rotatably mounted on one side of the fixed valve body, and the rotary valve body is provided with a medium inlet and a medium outlet. The positions of the medium inlet and the medium outlet correspond to the positions of the two opposite through holes, respectively.

[0009] Two sets of inclined tubes are used for transporting media. Each inclined tube includes a first inclined tube and a second inclined tube. The angle between the axis of the first inclined tube and the axis of the through hole, and the angle between the axis of the second inclined tube and the axis of the through hole, are both greater than 90° and less than 180°. The confluence end of the first inclined tube is connected to the confluence end of the second inclined tube. Both sets of inclined tubes are mounted on a fixed valve body. The branch ends of the first and second inclined tubes in each set are respectively connected to two adjacent through holes. By rotating the rotary valve body, the media inlet can be connected to the first inclined tube in one set of inclined tubes, and the media inlet can be connected to the second inclined tube in the other set.

[0010] To better realize this application, the above structure is further optimized. A stepped groove is provided at one end of the through hole facing the rotary valve body, and a sealing component for sealing the gap between the fixed valve body and the rotary valve body is provided in the stepped groove.

[0011] To better realize this application, further optimizations are made to the above structure, wherein the sealing assembly includes a reset member and a sealing ring;

[0012] The reset component is disposed in the stepped groove;

[0013] The sealing ring has an annular structure. The outer diameter of the sealing ring matches the diameter of the stepped groove, and the inner diameter of the sealing ring matches the diameter of the through hole. The sealing ring is fitted inside the stepped groove, and the two ends of the reset member abut against the sealing ring and the bottom of the stepped groove, respectively.

[0014] To better realize this application, the above structure is further optimized. The side wall of the stepped groove is provided with a first groove. The first groove is arranged around the circumference of the stepped groove. A first sealing ring for sealing the gap between the sealing ring and the stepped groove is provided in the first groove.

[0015] To better realize this application, further optimizations are made to the above structure. A rotating shaft is provided on the fixed valve body. The connecting end of the rotating shaft extends toward one side of the rotating valve body. The axis of the rotating shaft coincides with the center line of the fixed valve body. A locking nut is provided at the connecting end of the rotating shaft.

[0016] The rotary valve body has a through hole corresponding to the position of the rotating shaft. The rotary valve body can be sleeved on the rotating shaft through the through hole and locked by the locking nut, so that the rotary valve body and the fixed valve body fit tightly together.

[0017] To better realize this application, the above structure is further optimized by providing a sliding element between the locking nut and the rotary valve body to reduce friction.

[0018] To better realize this application, the above structure is further optimized. A second groove is provided on the side of the rotary valve body facing the fixed valve body. The second groove is arranged circumferentially around the rotary valve body. The medium inlet and the medium outlet are both located between the second groove and the center of the rotary valve body. A second sealing ring for sealing the gap between the fixed valve body and the rotary valve body is provided in the second groove.

[0019] To better realize this application, further optimizations are made to the above structure, and the oblique hole tube further includes a connecting block;

[0020] Both the flow-dividing end of the first inclined tube and the flow-dividing end of the second inclined tube are connected to the connecting block. The connecting block has a third groove on the side facing away from the first inclined tube. The third groove is arranged around the circumference of the first inclined tube and the circumference of the second inclined tube. A third sealing ring for sealing the gap between the inclined tube and the fixed valve body is provided in the third groove.

[0021] To better realize this application, further optimizations are made to the above structure, wherein the oblique hole tube is an integrally formed component.

[0022] To better realize this application, the above structure is further optimized, with the four through holes arranged circumferentially around the fixed valve body at equal intervals, and the distance between two adjacent through holes being greater than the diameter of the through hole.

[0023] As can be seen from the above technical solution, the fixed valve body and the rotating valve body in the rotary reversing valve provided in this application can cooperate to connect the medium inlet and the medium outlet with different through holes, so as to realize the connection, cut-off or change of the direction of medium flow. Moreover, the axis of the first inclined tube and the axis of the through hole and the axis of the second inclined tube and the axis of the through hole are both greater than 90° and less than 180°, so as to reduce the resistance of the flow channel and thereby improve the medium conveying efficiency. Attached Figure Description

[0024] Figure 1 This application provides a schematic diagram of the structure of a rotary directional valve;

[0025] Figure 2 This application provides a schematic diagram of the structure of a fixed valve body in a rotary directional valve.

[0026] Figure 3 This application provides a schematic diagram of the structure of the rotary valve body in a rotary directional valve.

[0027] Figure 4 This application provides a schematic diagram of the oblique orifice tube in a rotary directional valve.

[0028] Figure 5 A cross-sectional view of an oblique orifice tube in a rotary directional valve provided in this application;

[0029] Figure 6 A cross-sectional view of a rotary directional valve with a fixed valve body and a rotary valve body in a mating state, as provided in this application;

[0030] Figure 7 for Figure 6 Enlarged view of part A in the middle;

[0031] Figure 8 This is a schematic diagram of the structure when hole A1 is connected to the medium inlet in the embodiment;

[0032] Figure 9 This is a schematic diagram of the structure when hole B1 is connected to the medium inlet in the embodiment;

[0033] Figure 10 This is a schematic diagram illustrating the structure in the embodiment where all through holes are not connected to the medium inlet and the medium outlet.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Fixed valve body, 11-Through hole, 12-Stepped groove, 13-Rotating shaft, 14-Locking nut, 15-Sliding component;

[0036] 2- Rotary valve body, 21- Medium inlet, 22- Medium outlet; 23- Perforation,

[0037] 3- Inclined hole tube, 31- First inclined tube, 32- Second inclined tube, 33- Connecting block;

[0038] 4-Sealing assembly, 41-Reset component, 42-Sealing ring;

[0039] 51 - First sealing ring, 52 - Second sealing ring, 53 - Third sealing ring. Detailed Implementation

[0040] To enable those skilled in the art to better understand this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] In the embodiments of this application, such as Figures 1 to 10 As shown, the rotary directional valve includes a fixed valve body 1, a rotary valve body 2, and two sets of oblique-hole tubes 3; wherein,

[0042] The fixed valve body 1 is provided with four through holes 11, see Figure 2Four through holes 11 are arranged around the center of the fixed valve body 1, and the axis of the through holes 11 is parallel to the center line of the fixed valve body 1. The fixed valve body 1 is mainly used for the transfer of media.

[0043] The rotary valve body 2 is rotatably mounted on one side of the fixed valve body 1, and the end face of the rotary valve body 2 is in contact with the end face of the fixed valve body 1. The rotary valve body 2 is provided with a medium inlet 21 and a medium outlet 22. (See attached image) Figure 3 The positions of the medium inlet 21 and the medium outlet 22 correspond to the positions of the two corresponding through holes 11. By rotating the rotary valve body 2, the medium inlet 21 and the medium outlet 22 can be connected to the two corresponding through holes 11.

[0044] The inclined tube 3 includes a first inclined tube 31 and a second inclined tube 32. The angle between the axis of the first inclined tube 31 and the axis of the through hole 11, and the angle between the axis of the second inclined tube 32 and the axis of the through hole 11, are both greater than 90° and less than 180°. See [reference needed]. Figure 4 and Figure 5 The first inclined tube 31 is connected to the second inclined tube 32; both sets of inclined tubes 3 are mounted on the fixed valve body 1, see [reference]. Figure 1 Furthermore, the branch ends of the first inclined tube 31 and the second inclined tube 32 in each group of inclined tubes 3 are respectively connected to two adjacent through holes 11.

[0045] To better illustrate the usage of this rotary directional valve, this embodiment defines the four through holes 11 as hole A1, hole A2, hole B1, and hole B2, respectively. Figure 8 , Figure 9 and Figure 10 For example,

[0046] Hole A1 and hole B1 are located at the upper left and upper right of the figure, respectively, and hole A2 and hole B2 are located at the lower left and lower right of the figure, respectively. The above orientations (upper left, upper right, lower left and lower right) refer to the arrangement position of through hole 11 in the figure.

[0047] Holes A1 and A2 are respectively connected to the first inclined tube 31 and the second inclined tube 32 in a set of inclined tubes 3. The end of the set of inclined tubes 3 away from the fixed valve body 1 is connected to the hydraulic cylinder A chamber in the actuator. Holes B1 and B2 are respectively connected to the first inclined tube 31 and the second inclined tube 32 in another set of inclined tubes 3. The end of the set of inclined tubes 3 away from the fixed valve body 1 is connected to the hydraulic cylinder A chamber in the actuator.

[0048] Both the medium inlet 21 and the medium outlet 22 are connected to the main oil cylinder. The pump outlet of the hydraulic pump in the main oil cylinder is connected to the medium inlet 21. The hydraulic pump can pump the oil in the main oil cylinder into the medium inlet 21.

[0049] In the initial state, the medium inlet 21 is connected to the hole A1, and the medium outlet 22 is connected to the hole B2. See [link / reference]. Figure 8 At this time, holes A2 and B1 are blocked. The hydraulic pump can pump oil into the hydraulic cylinder A chamber through hole A1, while the oil in the hydraulic cylinder B chamber will flow back to the main cylinder through hole B2.

[0050] When it is necessary to change the oil flow direction, the user can rotate the rotary valve body 2 clockwise to connect the medium inlet 21 with orifice B1 and the medium outlet 22 with orifice A2. (See [reference]). Figure 9 At this time, holes B2 and A1 are blocked. The hydraulic pump can pump oil into the hydraulic cylinder B chamber through hole B1, while the oil in the hydraulic cylinder A chamber will flow back to the main cylinder through hole A2, thus changing the direction of oil flow and thereby changing the direction of movement of the actuator.

[0051] Preferably, holes A1 and B1 are located directly above holes A2 and B2, respectively, and the height of the end of the oblique tube 3 furthest from the fixed valve body 1 is greater than the height of holes A2 and B2; initially, hole B1 is blocked, see [reference]. Figure 5 The oil in the B chamber of the hydraulic cylinder can quickly flow back to the main cylinder through the second inclined pipe 32 in the inclined pipe 3. The oil that is squeezed into the first inclined pipe 31 by pressure will flow along the first inclined pipe 31 to the confluence of the first inclined pipe 31 and the second inclined pipe 32 under the action of gravity after the oil in the B chamber of the hydraulic cylinder has flowed back to the main cylinder through the second inclined pipe 32. There will be no oil accumulation.

[0052] In some embodiments, four through holes 11 are equally spaced and arranged circumferentially around the fixed valve body 1, see [reference]. Figures 8 to 10 As shown, the distance between two adjacent through holes 11 is greater than the diameter of the through hole 11; when the medium inlet 21 and the medium outlet 22 rotate to the space between two adjacent through holes 11, the end face of the fixed valve body 1 can block the medium inlet 21 and the medium outlet 22, thereby cutting off the oil circuit. Figure 10 As shown.

[0053] In some embodiments, a stepped groove 12 is provided at one end of the through hole 11 facing the rotary valve body 2, see [reference]. Figure 6 A sealing component 4 is provided in the stepped groove 12. The sealing component 4 can effectively seal the gap between the fixed valve body 1 and the rotary valve body 2 to prevent oil from leaking out through the gap between the fixed valve body 1 and the rotary valve body 2 during operation, so as to make the use of the rotary directional valve safer.

[0054] Specifically, the aforementioned sealing assembly 4 includes a reset member 41 and a sealing ring 42, see [link to documentation]. Figure 7 ;in,

[0055] The reset component 41 is disposed in the stepped groove 12;

[0056] The sealing ring 42 is an annular tubular structure. The outer diameter of the sealing ring 42 matches the diameter of the stepped groove 12, and the inner diameter of the sealing ring 42 matches the diameter of the through hole 11. The sealing ring 42 is fitted inside the stepped groove 12, and the two ends of the reset member 41 abut against the sealing ring 42 and the bottom of the stepped groove 12, respectively, so as to squeeze the sealing ring 42 towards the rotary valve body 2, thereby sealing the gap between the fixed valve body 1 and the rotary valve body 2.

[0057] Preferably, the reset member 41 is an elastic component commonly used in the prior art, such as a disc spring or a helical spring. The two ends of the reset member 41 abut against the sealing ring 42 and the bottom of the stepped groove 12, respectively. The reset member 41 is always in a compressed state, so that the restoring force of the reset member 41 can tightly squeeze the sealing ring 42 onto the rotary valve body 2, thereby sealing the gap between the fixed valve body 1 and the rotary valve body 2 and compensating for the wear between the fixed valve body 1 and the rotary valve body 2, so as to further improve the safety of the rotary reversing valve during use.

[0058] It is worth noting that the gap between the sealing ring 42 and the bottom of the stepped groove 12 can withstand the oil pressure. When oil enters the through hole 11, the pressurized oil will enter the gap between the sealing ring 42 and the bottom of the stepped groove 12, so that the oil pressure acts on the sealing ring 42 and pushes the sealing ring 42 towards the rotary valve body 2, so as to further ensure the sealing effect between the fixed valve body 1 and the rotary valve body 2.

[0059] In some embodiments, the sidewall of the stepped groove 12 is provided with a first groove, which is arranged circumferentially around the stepped groove 12. A first sealing ring 51 is provided in the first groove for sealing the gap between the sealing ring 42 and the stepped groove 12, thereby fixing the gap between the valve body 1 and the rotary valve body 2 and further improving the sealing effect of the gap between the fixed valve body 1 and the rotary valve body 2.

[0060] In some embodiments, the fixed valve body 1 is provided with a rotating shaft 13, the connecting end of the rotating shaft 13 extends toward one side of the rotating valve body 2, the axis of the rotating shaft 13 coincides with the center line of the fixed valve body 1, and a locking nut 14 is provided at the connecting end of the rotating shaft 13.

[0061] The rotary valve body 2 is provided with a through hole 23 at the position corresponding to the rotating shaft 13. The rotary valve body 2 can be sleeved on the rotating shaft 13 through the through hole 23, so that the rotary valve body 2 can rotate smoothly around the axis of the rotating shaft 13. The locking nut 14 locks and limits the position, so that the rotary valve body 2 and the fixed valve body 1 fit tightly together, thereby ensuring the working state and sealing effect of the rotary directional valve.

[0062] In some embodiments, a sliding member 15 for reducing friction is provided between the locking nut 14 and the rotary valve body 2, see [link to previous document]. Figure 6 This is to make the rotary valve body 2 rotate more smoothly. Preferably, the sliding member 15 is a thrust bearing.

[0063] In some embodiments, the rotary valve body 2 has a second groove on the side facing the fixed valve body 1. The second groove is arranged circumferentially around the rotary valve body 2. The medium inlet 21 and the medium outlet 22 are both located between the second groove and the center of the rotary valve body 2. A second sealing ring 52 for sealing the gap between the fixed valve body 1 and the rotary valve body 2 is provided in the second groove. See also Figure 7 This is to improve the sealing effect between the fixed valve body 1 and the rotary valve body 2.

[0064] In some embodiments, the oblique-hole tube 3 described above further includes a connecting block 33, see [link to documentation]. Figure 4 and Figure 5 ;in,

[0065] The flow splitting end of the first inclined tube 31 and the flow splitting end of the second inclined tube 32 are both connected to the connecting block 33. The connecting block 33 has a third groove on the side facing away from the first inclined tube 31. The third groove surrounds the circumference of the first inclined tube 31 and the second inclined tube 32. A third sealing ring 53 is provided in the third groove to seal the gap between the inclined tube 3 and the fixed valve body 1, so as to improve the sealing effect between the inclined tube 3 and the fixed valve body 1.

[0066] In some embodiments, the oblique-hole tube 3 described above is an integrally formed component to make the structure of the rotary reversing valve more robust.

[0067] Through the above embodiments, this application has the following beneficial effects or advantages:

[0068] 1) The fixed valve body 1 and the rotary valve body 2 in the rotary reversing valve can cooperate to enable the medium inlet 21 and the medium outlet 22 to be connected to different through holes 11 respectively, so as to realize the connection, cut-off or change of the flow direction of the medium. In addition, the axis of the first inclined tube 31 in the inclined tube 3 is greater than 90° and less than 180° with the axis of the through hole 11, and the axis of the second inclined tube 32 is greater than 90° and less than 180° with the axis of the through hole 11, so as to reduce the resistance of the flow channel and thereby improve the medium conveying efficiency.

[0069] 2) A sealing component 4 is provided in the stepped groove 12 of the rotary directional valve. The sealing component 4 can effectively seal the gap between the fixed valve body 1 and the rotary valve body 2 to prevent oil from leaking out through the gap between the fixed valve body 1 and the rotary valve body 2 during use, so as to make the use of the rotary directional valve safer.

[0070] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0071] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A rotary directional valve, characterized in that, include: A fixed valve body (1) is used for the transfer of media. The fixed valve body (1) is provided with four through holes (11). The four through holes (11) are arranged around the center of the fixed valve body (1). The axis of the through holes (11) is parallel to the center line of the fixed valve body (1). A rotary valve body (2) is used to switch the communication state of the through hole (11). The rotary valve body (2) is rotatably disposed on one side of the fixed valve body (1), and the rotary valve body (2) is provided with a medium inlet (21) and a medium outlet (22). The positions of the medium inlet (21) and the medium outlet (22) correspond to the positions of the two opposite through holes (11), respectively. Two sets of inclined tubes (3) are used for transporting media. The inclined tubes (3) include a first inclined tube (31) and a second inclined tube (32). The angle between the axis of the first inclined tube (31) and the axis of the through hole (11) and the angle between the axis of the second inclined tube (31) and the axis of the through hole (11) are both greater than 90° and less than 180°. The confluence end of the first inclined tube (31) is connected to the confluence end of the second inclined tube (32). Both sets of inclined tubes (3) are set on a fixed valve body (1). The branching ends of the first inclined tube (31) and the second inclined tube (32) in each set of inclined tubes (3) are respectively connected to a set of two adjacent through holes (11). By rotating the rotary valve body (2), the medium inlet (21) can be connected to the first inclined tube (31) in one set of inclined tubes (3), and the medium inlet (21) is connected to the second inclined tube (32) in another set.

2. The rotary directional valve according to claim 1, characterized in that, The through hole (11) has a stepped groove (12) at one end facing the rotary valve body (2), and a sealing assembly (4) for sealing the gap between the fixed valve body (1) and the rotary valve body (2) is provided in the stepped groove (12).

3. The rotary directional valve according to claim 2, characterized in that, The sealing assembly (4) includes a reset member (41) and a sealing ring (42); The reset component (41) is disposed in the stepped groove (12); The sealing ring (42) is an annular tubular structure. The outer diameter of the sealing ring (42) matches the diameter of the stepped groove (12), and the inner diameter of the sealing ring (42) matches the diameter of the through hole (11). The sealing ring (42) is fitted inside the stepped groove (12), and the two ends of the reset member (41) abut against the bottom of the sealing ring (42) and the stepped groove (12), respectively.

4. The rotary directional valve according to claim 3, characterized in that, The sidewall of the stepped groove (12) is provided with a first groove, which is arranged around the circumference of the stepped groove (12). A first sealing ring (51) is provided in the first groove for sealing the gap between the sealing ring (42) and the stepped groove (12).

5. The rotary directional valve according to claim 1, characterized in that, The fixed valve body (1) is provided with a rotating shaft (13), the connecting end of the rotating shaft (13) extends toward one side of the rotating valve body (2), the axis of the rotating shaft (13) coincides with the center line of the fixed valve body (1), and the connecting end of the rotating shaft (13) is provided with a locking nut (14). The rotary valve body (2) has a through hole (23) at the position corresponding to the rotating shaft (13). The rotary valve body (2) can be sleeved on the rotating shaft (13) through the through hole (23) and locked by the locking nut (14) so ​​that the rotary valve body (2) and the fixed valve body (1) fit tightly together.

6. The rotary directional valve according to claim 5, characterized in that, A sliding element (15) for reducing friction is provided between the locking nut (14) and the rotary valve body (2).

7. The rotary directional valve according to claim 1, characterized in that, The rotary valve body (2) has a second groove on the side facing the fixed valve body (1). The second groove is arranged around the circumference of the rotary valve body (2). The medium inlet (21) and the medium outlet (22) are both located between the center of the second groove and the rotary valve body (2). A second sealing ring (52) is provided in the second groove for sealing the gap between the fixed valve body (1) and the rotary valve body (2).

8. The rotary directional valve according to claim 1, characterized in that, The oblique-hole tube (3) also includes a connecting block (33); The flow-dividing ends of the first inclined tube (31) and the second inclined tube (32) are both connected to the connecting block (33). The connecting block (33) has a third groove on the side facing away from the first inclined tube (31). The third groove is arranged around the circumference of the first inclined tube (31) and the circumference of the second inclined tube (32). A third sealing ring (53) for sealing the gap between the inclined tube (3) and the fixed valve body (1) is provided in the third groove.

9. The rotary directional valve according to claim 1, characterized in that, The oblique hole tube (3) is an integrally formed component.

10. The rotary directional valve according to claim 1, characterized in that, The four through holes (11) are arranged circumferentially around the fixed valve body (1) at equal intervals, and the distance between two adjacent through holes (11) is greater than the diameter of the through hole (11).

Images