CN118110820A - Multi-way valve - Google Patents

Abstract

The present invention provides a multi-way valve comprising: a valve seat having a valve cavity and a plurality of valve ports; the first valve core is arranged in the valve cavity, a plurality of subchambers are distributed in the first valve core, and under the condition of rotation of the first valve core, different subchambers can be switched to be respectively communicated with corresponding valve ports; the second valve core is arranged in the valve cavity and is provided with a flow distribution cavity, the flow distribution cavity is communicated with at least one subchamber, the flow distribution cavity can be communicated with two valve ports, and under the condition of rotation, the proportion of fluid which is conveyed from the flow distribution cavity to the two valve ports which are correspondingly communicated can be adjusted. By adopting the scheme, two valve cores are arranged in the valve seat, multiple flow path switching can be realized through the cooperation of the two valve cores, a flow distribution cavity in the second valve core can be communicated with the two valve ports, and the proportion of fluid which is conveyed to the corresponding two valve ports from the flow distribution cavity can be adjusted by rotating the second valve core, so that the multi-way valve also has the function of adjusting the flow proportion, and the application scene is enriched.

Description

Multi-way valve

Technical Field

The invention relates to the technical field of multi-way valves, in particular to a multi-way valve.

Background

The multi-way valve (such as a water valve in a vehicle) mainly comprises a valve seat, a valve core and other structures, wherein a plurality of valve ports are arranged on the valve seat, a plurality of subchambers are arranged in the valve core, and different subchambers are communicated with the valve ports through position adjustment of the valve core, so that switching of different flow paths is realized. In the existing multi-way valve, only one valve core is usually arranged, and the flow path switching mode is fewer. There are multiple-way valves in which two spools are provided, and more modes of flow path switching can be achieved by cooperation of the two spools. However, the multi-way valve has no function of adjusting the proportion of the fluid output to different valve ports, and the application field is still limited.

Disclosure of Invention

The invention provides a multi-way valve, which has the function of adjusting flow ratio and enriches applicable scenes.

In order to achieve the above object, the present invention provides a multi-way valve comprising: a valve seat having a valve cavity and a plurality of valve ports; the first valve core is arranged in the valve cavity, a plurality of subchambers are distributed in the first valve core, and under the condition of rotation of the first valve core, different subchambers can be switched to be respectively communicated with corresponding valve ports; the second valve core is arranged in the valve cavity and is provided with a flow distribution cavity, the flow distribution cavity is communicated with at least one subchamber, the flow distribution cavity can be communicated with two valve ports, and under the condition of rotation, the proportion of fluid which is conveyed from the flow distribution cavity to the two valve ports which are correspondingly communicated can be adjusted.

Further, the opening area of the flow distribution cavity is larger than the sum of the areas of the two corresponding communicated valve ports, the two valve ports communicated with the flow distribution cavity and the opening of the flow distribution cavity are all arranged along the circumference of the second valve core, and when the second valve core rotates, the proportion of fluid is regulated by regulating the superposition area of the opening of the flow distribution cavity and the two valve ports.

Further, the first valve core is sequentially provided with a plurality of layers of circulation cavities along the axial direction of the first valve core, and each layer of circulation cavity is provided with a plurality of sub-cavities along the circumferential direction of the first valve core at intervals; wherein at least one sub-chamber of the flow-through chamber adjacent to the flow-through chamber is in communication with the flow-through chamber, or at least one sub-chamber of the flow-through chamber spaced from the flow-through chamber is in communication with the flow-through chamber.

Further, the plurality of valve ports of the valve seat are divided into at least two groups of valve port groups side by side, the plurality of valve ports in each group of valve port groups are arranged at intervals along the axial direction of the first valve core, and four to eight subchambers are arranged in the circulation chamber of the first valve core.

Further, the first valve core and the second valve core are coaxially arranged, the first valve core is provided with an inner channel extending along the axial direction of the first valve core, one end of the inner channel is communicated with the inlet of the flow dividing cavity, and at least one subchamber is communicated with the inner channel; the multi-way valve further includes a first seal ring positioned between the first valve spool and the second valve spool, and the first seal ring is disposed around the inner passage and the inlet of the flow splitting chamber.

Further, the multi-way valve further comprises a rotating shaft and a shaft sleeve, a part of the rotating shaft is arranged in the first valve core, the rotating shaft penetrates through the second valve core, a part of the shaft sleeve is arranged in the second valve core, the shaft sleeve is sleeved on the rotating shaft, the rotating shaft drives the first valve core to rotate, and the shaft sleeve drives the second valve core to rotate; the multi-way valve further comprises a second sealing ring, the second sealing ring is sleeved on the rotating shaft, one side of the second sealing ring is in butt joint with the first valve core, and the other side of the second sealing ring is in butt joint with the shaft sleeve or the second valve core.

Further, the multi-way valve further comprises a valve cover, a third sealing ring and a fourth sealing ring, the valve cover is connected with the valve seat to seal the opening of the valve cavity, the third sealing ring is arranged between the periphery of the opening of the valve cavity and the valve cover, the rotating shaft and the shaft sleeve penetrate through the valve cover, the fourth sealing ring is sleeved on the shaft sleeve, and the fourth sealing ring is in sealing fit with the shaft sleeve and the valve cover.

Further, the second valve core comprises an outer cylinder, an inner cylinder and a connecting plate, wherein the inner cylinder is positioned in the outer cylinder and is coaxially arranged with the outer cylinder, and the connecting plate is connected with the outer cylinder and the inner cylinder; the shunt cavity comprises an input cavity and an output cavity which are mutually communicated, the input cavity is formed by the outer surface of the inner cylinder, the inner surface of the outer cylinder and the area between the connecting plates, the input cavity is communicated with at least one subchamber, the output cavity is positioned in the side wall of the outer cylinder, the opening of the output cavity is positioned on the outer surface of the outer cylinder, and the output cavity can be communicated with two valve ports.

Further, the connecting plate comprises a first plate body and a second plate body which are arranged in parallel, the first plate body and the second plate body are respectively connected with the two sides of the inner cylinder, and the first plate body and the second plate body are both connected with the inner surface of the outer cylinder; the number of the input cavities is two, and the two input cavities are symmetrically arranged relative to the plane where the first plate body and the second plate body are positioned.

Further, the second valve core further comprises a sealing plate and a separation plate, the sealing plate seals one side of the outer cylinder, which is away from the first valve core, of the outer cylinder, the separation plate is positioned in the output cavity, and the separation plate divides the output cavity into two symmetrical parts.

Further, the multi-way valve further comprises a valve cover, a first limiting piece and a second limiting piece, the valve cover is connected with the valve seat to block the opening of the valve cavity, the first limiting piece is arranged on the valve cover, the second limiting piece is arranged on the second valve core, and the first limiting piece and the second limiting piece are matched at the circumferential stop of the second valve core.

Further, the multi-way valve further comprises a sealing gasket, the sealing gasket is arranged on the inner wall of the valve cavity, and the first valve core and the second valve core are matched with the sealing gasket.

Further, a first sealing rib is arranged on the periphery of the opening of the subchamber, and the first sealing rib on the periphery of the subchamber is attached to the sealing gasket under the condition that the subchamber is communicated with the valve port; the periphery of the opening of the shunt cavity is provided with a second sealing rib, and the second sealing rib at the periphery of the shunt cavity is attached to the sealing gasket.

By applying the technical scheme of the invention, the invention provides a multi-way valve, which comprises the following components: a valve seat having a valve cavity and a plurality of valve ports; the first valve core is arranged in the valve cavity, a plurality of subchambers are distributed in the first valve core, and under the condition of rotation of the first valve core, different subchambers can be switched to be respectively communicated with corresponding valve ports; the second valve core is arranged in the valve cavity and is provided with a flow distribution cavity, the flow distribution cavity is communicated with at least one subchamber, the flow distribution cavity can be communicated with two valve ports, and under the condition of rotation, the proportion of fluid which is conveyed from the flow distribution cavity to the two valve ports which are correspondingly communicated can be adjusted. By adopting the scheme, two valve cores are arranged in the valve seat, multiple flow path switching can be realized through the cooperation of the two valve cores, a flow distribution cavity in the second valve core can be communicated with the two valve ports, and the proportion of fluid which is conveyed from the flow distribution cavity to the corresponding two valve ports can be adjusted by rotating the second valve core, so that the multi-way valve also has the function of adjusting the flow proportion, and the applicable scene is enriched.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 shows an exploded view of a multi-way valve provided by an embodiment of the present invention;

FIG. 2 illustrates a side view of a multi-way valve provided by an embodiment of the present invention;

FIG. 3 shows a B-B cross-sectional view of the multi-way valve of FIG. 2;

FIG. 4 shows a cross-sectional view of the multi-way valve of FIG. 2 along the radial direction of the second spool;

FIG. 5 shows a cross-sectional view of the multi-way valve of FIG. 2;

FIG. 6 shows a perspective view of the second valve spool of FIG. 1;

FIG. 7 shows a schematic view of the second spool of FIG. 6 on one side;

FIG. 8 shows a schematic view of the second spool of FIG. 6 on the other side;

FIG. 9 shows a perspective view of the first valve spool of FIG. 1;

FIG. 10 shows a C-C cross-sectional view of the multi-way valve of FIG. 2;

FIG. 11 shows a schematic view of the gasket of FIG. 1;

FIG. 12 shows a schematic view of the assembly of the gasket and valve seat of FIG. 1;

Fig. 13 shows an assembled schematic view of the gasket, the first spool, and the second spool in fig. 1.

Wherein the above figures include the following reference numerals:

10. a valve seat; 11. a valve port;

20. a first valve core; 21. a subchamber; 22. an inner channel; 23. a first sealing rib;

30. A second valve core; 31. a shunt cavity; 311. an input chamber; 312. an output chamber; 32. an outer cylinder; 321. straight ribs; 33. an inner cylinder; 34. a connecting plate; 341. a first plate body; 342. a second plate body; 35. a sealing plate; 36. a partition plate; 37. a second sealing rib;

41. A first seal ring; 42. a second seal ring; 43. a third seal ring; 44. a fourth seal ring;

51. a rotating shaft; 52. a shaft sleeve; 53. a first stop collar; 54. a second limiting ring;

61. a valve cover; 62. a second limiting piece;

70. A sealing gasket; 71. a transverse convex rib; 72. longitudinal ribs.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 13, an embodiment of the present invention provides a multi-way valve including: a valve seat 10, the valve seat 10 having a valve chamber and a plurality of valve ports 11; the first valve core 20 is arranged in the valve cavity, a plurality of subchambers 21 are distributed in the first valve core 20, and under the condition that the first valve core 20 rotates, different subchambers 21 can be switched to be respectively communicated with corresponding valve ports 11; the second valve core 30 is arranged in the valve cavity, the second valve core 30 is provided with a flow distribution cavity 31, the flow distribution cavity 31 is communicated with the at least one subchamber 21, the flow distribution cavity 31 can be communicated with the two valve ports 11, and the proportion of fluid which is conveyed from the flow distribution cavity 31 to the two valve ports 11 which are correspondingly communicated can be adjusted under the condition that the second valve core 30 rotates.

By adopting the scheme, two valve cores are arranged in the valve seat 10, multiple flow path switching can be realized through the cooperation of the two valve cores, the flow distribution cavity 31 in the second valve core 30 can be communicated with the two valve ports 11, and the proportion of fluid which is conveyed from the flow distribution cavity 31 to the corresponding two valve ports 11 can be adjusted by rotating the second valve core 30, so that the multi-way valve also has the function of adjusting the flow proportion, and enriches applicable scenes.

As shown in fig. 3 and 4, the opening area of the split cavity 31 is larger than the sum of the areas of the two corresponding communicated valve ports 11, the two valve ports 11 communicated with the split cavity 31 and the opening of the split cavity 31 are all arranged along the circumferential direction of the second valve core 30, and when the second valve core 30 rotates, the overlapping area of the opening of the split cavity 31 and the two valve ports 11 can be changed, so that the proportion of fluid is adjusted by adjusting the overlapping area of the opening of the split cavity 31 and the two valve ports 11. In this way, a continuous adjustment of the proportion of fluid delivered to the two ports 11 is achieved.

In this embodiment, the first valve core 20 is sequentially provided with multiple layers of circulation cavities along the axial direction thereof, and each layer of circulation cavity is provided with multiple sub-cavities 21 along the circumferential direction of the first valve core 20 at intervals; wherein at least one sub-chamber 21 of the flow-through chambers adjacent to the flow-through chamber 31 communicates with the flow-through chamber 31 or at least one sub-chamber 21 of the flow-through chambers spaced from the flow-through chamber 31 communicates with the flow-through chamber 31. In the case where one sub-chamber 21 of the flow-through chambers adjacent to the flow-through chamber 31 communicates with the flow-through chamber 31, the flow path length can be reduced, and the resistance to fluid conveyance can be reduced.

Alternatively, the plurality of ports 11 of the valve seat 10 are divided into at least two groups of ports arranged side by side, and the plurality of ports 11 in each group of ports are arranged at intervals along the axial direction of the first valve element 20, for example, the groups of ports are two groups, and 5 ports 11 are arranged in each group of ports. The flow chamber of the first spool 20 has four to eight subchambers 21 therein. Compared with the existing valve core structure, the valve core structure has the advantages that the number of subchambers 21 of the first valve core 20 is small, and the whole volume of the first valve core 20 can be reduced. That is, when the volume of the first valve core 20 is small, the first valve core 20 and the second valve core 30 cooperate with each other to realize multi-mode communication.

As shown in fig. 3 and 5, the first spool 20 and the second spool 30 are coaxially disposed, the first spool 20 has an inner passage 22 extending in the axial direction thereof, one end of the inner passage 22 communicates with the inlet of the split chamber 31, and at least one subchamber 21 communicates with the inner passage 22, so that communication between the subchamber 21 and the split chamber 31 is achieved through the inner passage 22. The multi-way valve further comprises a first sealing ring 41, the first sealing ring 41 being located between the first spool 20 and the second spool 30, and the first sealing ring 41 being arranged around the inner channel 22 and the inlet of the shunt chamber 31. By the first seal ring 41, the fluid in the inner passage 22 of the first valve element 20 is prevented from flowing out of the gap between the first valve element 20 and the second valve element 30, and the fluid located inside the valve seat 10 and outside the two valve elements is prevented from entering the valve elements from the gap between the first valve element 20 and the second valve element 30.

Optionally, as shown in fig. 5 and 9, one end of the first valve core 20 is provided with a first limiting ring 53, the first limiting ring 53 penetrates into the second valve core 30, the first limiting ring 53 is provided with a first annular step, the second valve core 30 is provided with a second annular step, the peripheral surface of the first annular step is opposite to the peripheral surface of the second annular step, the bottom surface of the first annular step is opposite to the bottom surface of the second annular step, and the first sealing ring 41 is clamped in an area formed by surrounding the peripheral surface of the first annular step, the peripheral surface of the second annular step, the bottom surface of the first annular step and the bottom surface of the second annular step, so that the limiting of the first sealing ring 41 is realized, and the sealing effect is ensured.

In this embodiment, the multi-way valve further includes a rotating shaft 51 and a shaft sleeve 52, wherein a part of the rotating shaft 51 is disposed in the first valve core 20, the rotating shaft 51 passes through the second valve core 30, a part of the shaft sleeve 52 is disposed in the second valve core 30, the shaft sleeve 52 is sleeved on the rotating shaft 51, the rotating shaft 51 drives the first valve core 20 to rotate, and the shaft sleeve 52 drives the second valve core 30 to rotate; the multi-way valve further comprises a second sealing ring 42, the second sealing ring 42 is sleeved on the rotating shaft 51, one side of the second sealing ring 42 is in butt joint with the first valve core 20, and the other side of the second sealing ring 42 is in butt joint with the shaft sleeve 52 or the second valve core 30. By providing the second seal ring 42, leakage of fluid from the gap between the first valve body 20 and the rotary shaft 51 can be prevented, leakage of fluid from the gap between the second valve body 30 and the rotary shaft 51 can be prevented, and sealing effect can be improved.

Optionally, one end of the first valve core 20 is provided with a second limiting ring 54, the second limiting ring 54 is arranged around the rotating shaft 51, a first hole section and a second hole section which are mutually communicated are arranged in the second valve core 30, the diameter of the first hole section is larger than that of the second hole section, the shaft sleeve 52 penetrates into the first hole section, one end of the shaft sleeve 52 is matched with an end surface stop of the second hole section, the second limiting ring 54 penetrates into the second hole section, and the second sealing ring 42 is positioned in an area formed by surrounding the inner wall of the second hole section, the outer wall of the rotating shaft 51, the end surface of the shaft sleeve 52 and the end surface of the second limiting ring 54, so that reliable limiting of the second limiting ring 54 is realized, and the sealing effect is ensured.

The end face of the shaft sleeve 52 is provided with a first annular rib in a protruding mode, one side of the first annular rib is abutted against one side of the second sealing ring 42, the end face of the second limiting ring 54 is provided with a second annular rib in a protruding mode, and the second annular rib is abutted against the other side of the second sealing ring 42, so that a better sealing effect can be achieved.

Optionally, in the present embodiment, the multi-way valve further includes a valve cover 61, a third sealing ring 43 and a fourth sealing ring 44, where the valve cover 61 and the valve seat 10 are connected to seal an opening of the valve cavity, the third sealing ring 43 is disposed between a periphery of the opening of the valve cavity and the valve cover 61, the rotating shaft 51 and the shaft sleeve 52 pass through the valve cover 61, the fourth sealing ring 44 is sleeved on the shaft sleeve 52, and the fourth sealing ring 44 is in sealing fit with both the shaft sleeve 52 and the valve cover 61. Thus, the gap between the valve cover 61 and the valve seat 10 is sealed, and the gap between the valve cover 61 and the shaft sleeve 52 is sealed, so that leakage of fluid from the gap is avoided. The first seal ring 41 and the third seal ring 43 are O-shaped seal rings, and the second seal ring 42 and the fourth seal ring 44 are X-shaped seal rings.

As shown in fig. 6 to 8, the second valve element 30 includes an outer cylinder 32, an inner cylinder 33, and a connection plate 34, the inner cylinder 33 is located in the outer cylinder 32 and is coaxially arranged with the outer cylinder 32, and the connection plate 34 is connected with both the outer cylinder 32 and the inner cylinder 33; the shunt chamber 31 includes an input chamber 311 and an output chamber 312 which are communicated with each other, the region between the outer surface of the inner cylinder 33, the inner surface of the outer cylinder 32 and the connection plate 34 forms the input chamber 311, the input chamber 311 is communicated with at least one sub-chamber 21, the output chamber 312 is located in the side wall of the outer cylinder 32, the opening of the output chamber 312 is located on the outer surface of the outer cylinder 32, and the output chamber 312 can be communicated with two valve ports 11. The input chamber 311 is used to communicate with the subchamber 21 for fluid input, and the output chamber 312 is used to communicate with the valve port 11 for flow output and flow ratio adjustment. The opening direction of the input chamber 311 is the axial direction of the second spool 30, and the opening direction of the output chamber 312 is the radial direction of the second spool 30, thus realizing the change of the fluid direction.

The connecting plate 34 includes a first plate 341 and a second plate 342 that are disposed in parallel, the first plate 341 and the second plate 342 are respectively connected with two sides of the inner cylinder 33, and the first plate 341 and the second plate 342 are both connected with the inner surface of the outer cylinder 32; the number of the input cavities 311 is two, and the two input cavities 311 are symmetrically arranged relative to the plane where the first plate 341 and the second plate 342 are located. Compare with the setting of prior art a plurality of plate structures, the structure setting of two plate bodies in this scheme can guarantee that fluid has the biggest chamber that holds when entering into second case 30, reduces the resistance loss between the import and the export of fluid follow reposition of redundant personnel chamber 31.

The second valve core 30 further comprises a sealing plate 35 and a separation plate 36, wherein the sealing plate 35 seals one side of the outer cylinder 32 away from the first valve core 20, and thus one side of the outer cylinder 32 away from the first valve core 20 is of a closed structure, and leakage is avoided. The partition plate 36 is located in the output cavity 312, the partition plate 36 divides the output cavity 312 into two symmetrical parts, so that the partition plate 36 can split the fluid output by the output cavity 312, and the partition plate 36 also plays a role in structural support and strength assurance.

Optionally, in this embodiment, the multi-way valve further includes a valve cover 61, a first limiting member and a second limiting member 62, where the valve cover 61 and the valve seat 10 are connected to seal an opening of the valve cavity, the first limiting member is disposed on the valve cover 61, the second limiting member 62 is disposed on the second valve core 30, and the first limiting member and the second limiting member 62 are in stop fit in a circumferential direction of the second valve core 30. The range of rotation of the second spool 30 may be limited by the cooperation of the first and second check members 62.

The first limiting piece, the second limiting piece and the matching can be divided into the following three cases:

When the number of the stoppers of the second valve element 30 is 1 and the number of the stoppers on the valve cover 61 is 1, the position where the stoppers of the second valve element 30 abut against the stoppers of the valve cover 61 is defined as the zero point position, after which the second valve element 30 rotates in a direction away from the stoppers of the valve cover 61 until the stoppers of the second valve element 30 abut against the stoppers of the valve cover 61, after which the second valve element 30 is retracted and rotated reversely. In this case, the rotation angle of the second spool 30 from the zero position to the start-retraction reverse rotation position is large.

When the number of the limiting members of the second valve element 30 is 2, which are symmetrically arranged, the number of the limiting members on the valve cover 61 is 1, the position of one of the limiting members of the second valve element 30, which abuts against the limiting member of the valve cover 61, is defined as the zero point position, the second valve element 30 rotates in the direction away from the limiting member of the valve cover 61 until the limiting member of the other second valve element 30 abuts against the limiting member of the valve cover 61, and then the second valve element 30 is retracted to rotate reversely. By providing two stoppers on the second spool 30, the rotation angle of the second spool 30 from the zero point position to the start-retraction reverse rotation position can be reduced.

When the number of the limiting members of the second valve core 30 is 1,2 limiting members on the valve cover 61 are correspondingly arranged, the position of the limiting member of the second valve core 30, which abuts against one limiting member of the valve cover 61, is defined as a zero point position, the second valve core 30 rotates in a direction away from the limiting member of the valve cover 61 until the limiting member of the second valve core 30 abuts against the other limiting member of the valve cover 61, and the second valve core 30 is retracted to rotate reversely. By providing two stoppers on the valve cover 61, the rotation angle of the second spool 30 from the zero position to the retracted reverse rotation position can be reduced. Both limiting parts are arranged on the valve cover 61, so that the stability of the limiting part structure can be ensured, and the structure is the best mode.

As shown in fig. 1, 10 to 13, the multi-way valve further includes a gasket 70, the gasket 70 is disposed on an inner wall of the valve cavity, and the first valve core 20 and the second valve core 30 are both matched with the gasket 70. By providing the gasket 70, the fitting gap can be sealed against fluid leakage.

The periphery of the opening of the subchamber 21 is provided with a first sealing rib 23, and the first sealing rib 23 at the periphery of the subchamber 21 is attached to the sealing gasket 70 under the condition that the subchamber 21 is communicated with the valve port 11; the second sealing rib 37 is arranged on the periphery of the opening of the shunt cavity 31, and the second sealing rib 37 on the periphery of the shunt cavity 31 is attached to the sealing gasket 70. By the above arrangement, a reliable seal of the opening periphery of the sub-chamber 21 and a reliable seal of the opening periphery of the split-chamber 31 can be achieved.

Optionally, a plurality of straight ribs 321 are arranged on the outer peripheral surface of the outer cylinder 32, each straight rib 321 extends along the axial direction of the outer cylinder 32, and the straight ribs 321 are used for being in sealing fit with the sealing gasket 70, so that the sealing effect on the opening of the flow distribution cavity 31 is improved.

Alternatively, two gaskets 70 are provided, the two gaskets 70 being disposed opposite to each other, and the first valve element 20 and the second valve element 30 being located between the two gaskets 70. Compared with the prior art, the sealing and limiting effects of the two opposite sealing gaskets on the valve core are better, so that even if the fluid flow in the valve core is large or the rotating shaft matched with the valve core is worn, the valve core is not easy to eccentric, thus the leakage is not easy, and the sealing performance of the multi-way valve is improved.

In this embodiment, the two gaskets 70 may be symmetrically disposed with respect to a plane of symmetry, and the rotation center line of the spool is located at the plane of symmetry. The two symmetrically arranged sealing gaskets 70 have better position limiting effect on the valve core, and can better prevent the valve core from being eccentric in the use process. In this embodiment, the plurality of valve ports 11 are all located on the same side of the symmetry plane, so that when the fluid flowing into the subchamber 21 from the valve ports 11 generates a force on the valve core, the sealing gasket located on the other side of the symmetry plane can play a supporting role on the valve core, and can counteract or weaken the force generated by the fluid on the valve core, so as to avoid the valve core from being eccentric.

Wherein, a gasket 70 has a plurality of through holes, and a plurality of through holes and a plurality of valve ports are arranged in a one-to-one correspondence. The plurality of through holes can avoid the plurality of valve ports 11 so as to ensure the fluid to pass through. In this way, the gasket 70 surrounds the plurality of valve ports 11, and can seal the peripheral area of the valve ports 11, thereby preventing leakage. When fluid enters the subchamber 21 from the valve port 11, the fluid generates acting force on the valve core, the acting force mainly faces to the other direction, under the condition that only one sealing gasket exists, the valve core is easy to eccentric due to the acting force of the fluid, the coaxiality is affected, leakage is easy to occur, and in the scheme, the valve core can be supported due to the existence of the two sealing gaskets, the influence of the acting force of the fluid on the valve core can be weakened, so that the valve core is avoided from being eccentric, and leakage is avoided.

As shown in fig. 11, the gasket 70 is provided with a plurality of lateral ribs 71 and a plurality of longitudinal ribs 72 side by side on the side facing away from the spool, the lateral ribs 71 extending in the circumferential direction of the spool, the longitudinal ribs 72 extending in the axial direction of the spool, each valve port 11 being surrounded by the lateral ribs 71 and the longitudinal ribs 72. Each valve port 11 of the inner wall of the valve cavity is surrounded by the transverse convex ribs 71 and the longitudinal convex ribs 72, the periphery of the valve port 11 is reliably sealed, leakage of fluid from gaps at the periphery of the valve port 11 is avoided, and the sealing effect is ensured.

Specifically, the lateral protruding rib 71 includes a plurality of first sub-ribs arranged at intervals, the first sub-ribs extending in the circumferential direction of the spool, and the longitudinal protruding rib 72 includes a plurality of second sub-ribs arranged at intervals, the second sub-ribs extending in the axial direction of the spool. Through the setting of a plurality of first sub-muscle and a plurality of second sub-muscle, sealing effect has further been improved.

As shown in fig. 9, the opening periphery of the subchamber 21 is provided with a first sealing rib 23, and the first sealing rib 23 is of a closed structure. When the subchamber 21 and the valve port 11 communicate, the first seal bead 23 on the periphery of the subchamber 21 is bonded to the gasket 70, and the first seal bead 23 faces the lateral bead 71 and the longitudinal bead 72 surrounding the valve port 11. Because the transverse convex ribs 71 and the longitudinal convex ribs 72 are of convex structures, the thicknesses are relatively thick, and under the condition that the subchamber 21 is communicated with the valve port 11, the first sealing ribs 23 on the periphery of the subchamber 21 are opposite to the transverse convex ribs 71 and the longitudinal convex ribs 72, so that the mutual pressure between the first sealing ribs 23 and the sealing gasket 70 is larger, gaps are avoided between the first sealing ribs 23 and the sealing gasket 70, and gaps are avoided between the sealing gasket 70 and the periphery of the valve port 11, thereby realizing reliable sealing.

Wherein, the sealing gasket 70 comprises an arc-shaped plate layer and a rubber layer which are connected with each other, wherein the arc-shaped plate layer is positioned between the rubber layer and the valve core, and the rubber layer is provided with a transverse convex rib 71 and a longitudinal convex rib 72. The arc-shaped plate layer can be made of plastic, the hardness of the arc-shaped plate layer is larger than that of the rubber layer, so that the supporting effect is achieved, the rubber layer has good elastic deformation capacity, and the sealing effect is improved. The surface of the arc plate layer facing the valve core is a smooth surface so as to reduce the resistance of the valve core during rotation.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A multi-way valve, comprising:

a valve seat (10), the valve seat (10) having a valve cavity and a plurality of valve ports (11);

The first valve core (20) is arranged in the valve cavity, a plurality of subchambers (21) are distributed in the first valve core (20), and under the condition of rotation of the first valve core (20), different subchambers (21) can be switched to be respectively communicated with the corresponding valve ports (11);

The second valve core (30) is arranged in the valve cavity, the second valve core (30) is provided with a flow distribution cavity (31), the flow distribution cavity (31) is communicated with at least one subchamber (21), the flow distribution cavity (31) can be communicated with two valve ports (11), and the proportion of fluid which is conveyed from the flow distribution cavity (31) to the two valve ports (11) which are correspondingly communicated can be adjusted under the condition of rotation of the second valve core (30).

2. The multi-way valve according to claim 1, wherein the opening area of the flow dividing chamber (31) is larger than the sum of the areas of the two valve ports (11) which are correspondingly communicated, the openings of the two valve ports (11) which are communicated with the flow dividing chamber (31) and the flow dividing chamber (31) are all arranged along the circumferential direction of the second valve core (30), and the proportion of fluid is adjusted by adjusting the overlapping area of the opening of the flow dividing chamber (31) and the two valve ports (11) when the second valve core (30) rotates.

3. The multi-way valve according to claim 1, wherein the first valve core (20) is provided with a plurality of layers of circulation cavities in sequence along the axial direction thereof, and each layer of circulation cavity is provided with a plurality of subchambers (21) along the circumferential direction of the first valve core (20); wherein at least one of the sub-chambers (21) in the flow-through chamber adjacent to the flow-through chamber (31) communicates with the flow-through chamber (31), or at least one of the sub-chambers (21) in the flow-through chamber spaced from the flow-through chamber (31) communicates with the flow-through chamber (31).

4. The multiway valve according to claim 1, wherein the first valve spool (20) and the second valve spool (30) are coaxially arranged, the first valve spool (20) having an inner passage (22) extending in its axial direction, one end of the inner passage (22) being in communication with the inlet of the shunt chamber (31), at least one of the subchambers (21) being in communication with the inner passage (22); the multi-way valve further comprises a first sealing ring (41), wherein the first sealing ring (41) is positioned between the first valve core (20) and the second valve core (30), and the first sealing ring (41) is arranged around the inner channel (22) and the inlet of the diversion cavity (31).

5. The multi-way valve according to claim 1, further comprising a rotary shaft (51) and a shaft sleeve (52), wherein a part of the rotary shaft (51) is disposed in the first valve core (20), the rotary shaft (51) penetrates through the second valve core (30), a part of the shaft sleeve (52) is disposed in the second valve core (30), the shaft sleeve (52) is sleeved on the rotary shaft (51), the rotary shaft (51) drives the first valve core (20) to rotate, and the shaft sleeve (52) drives the second valve core (30) to rotate; the multi-way valve further comprises a second sealing ring (42), the second sealing ring (42) is sleeved on the rotating shaft (51), one side of the second sealing ring (42) is abutted to the first valve core (20), and the other side of the second sealing ring (42) is abutted to the shaft sleeve (52) or the second valve core (30).

6. The multi-way valve according to claim 1, wherein the second valve core (30) comprises an outer cylinder (32), an inner cylinder (33) and a connecting plate (34), the inner cylinder (33) is located in the outer cylinder (32) and is coaxially arranged with the outer cylinder (32), and the connecting plate (34) is connected with both the outer cylinder (32) and the inner cylinder (33); the split-flow cavity (31) comprises an input cavity (311) and an output cavity (312) which are communicated with each other, the outer surface of the inner cylinder (33), the inner surface of the outer cylinder (32) and the area between the connecting plates (34) form the input cavity (311), the input cavity (311) is communicated with at least one subchamber (21), the output cavity (312) is positioned in the side wall of the outer cylinder (32), an opening of the output cavity (312) is positioned on the outer surface of the outer cylinder (32), and the output cavity (312) can be communicated with two valve ports (11).

7. The multi-way valve according to claim 6, wherein the connecting plate (34) comprises a first plate body (341) and a second plate body (342) which are arranged in parallel, the first plate body (341) and the second plate body (342) are respectively connected with two sides of the inner cylinder (33), and the first plate body (341) and the second plate body (342) are respectively connected with the inner surface of the outer cylinder (32); the number of the input cavities (311) is two, and the two input cavities (311) are symmetrically arranged relative to the plane where the first plate body (341) and the second plate body (342) are located.

8. The multi-way valve of claim 6, wherein the second valve spool (30) further comprises a sealing plate (35) and a partition plate (36), the sealing plate (35) sealing off a side of the outer cylinder (32) facing away from the first valve spool (20), the partition plate (36) being located within the output chamber (312), the partition plate (36) dividing the output chamber (312) into two symmetrical portions.

9. The multi-way valve according to claim 1, further comprising a gasket (70), wherein the gasket (70) is disposed on an inner wall of the valve chamber, and wherein the first valve element (20) and the second valve element (30) are each mated with the gasket (70).

10. The multiway valve according to claim 9, wherein the peripheral edge of the opening of the subchamber (21) is provided with a first sealing rib (23), and the first sealing rib (23) of the peripheral edge of the subchamber (21) is attached to the sealing gasket (70) when the subchamber (21) and the valve port (11) are communicated; the periphery of the opening of the flow distribution cavity (31) is provided with a second sealing rib (37), and the second sealing rib (37) at the periphery of the flow distribution cavity (31) is attached to the sealing gasket (70).