Valve device

Abstract

The valve device comprises a plurality of external flow channel openings, a first valve element cavity, a plurality of external flow channel openings and a second valve element cavity, the plurality of external flow channel openings at least comprise a first opening, a second opening, a third opening and a fourth opening, a first circulation channel is formed between the first opening and the second opening, and a second circulation channel is formed between the second opening and the third opening. A second circulation channel is formed between the third opening and the fourth opening, the first valve element cavity and the second valve element cavity are arranged along the first axis, and a third circulation channel is formed between the first valve element cavity and the second valve element cavity so that the first valve element cavity can communicate with the second valve element cavity. According to the valve device, the aim of integrating the multi-flow-channel switching function in a single valve body is successfully achieved, the occupied space is obviously reduced, the complex fluid control function is achieved in the limited space, and the overall structural layout is optimized.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid control field especially relates to a valve device. BACKGROUND

[0002] The conventional valve device adopts the form of single opening opening and closing to realize the opening and closing function of fluid passage, and this valve device often appears to be inadequate when facing the complex fluid control demand. For example, when the flexible switching between multiple fluid passages needs to be realized, usually a combination of multiple valve devices needs to be adopted. This combination mode not only increases the manufacturing cost and installation complexity, but also significantly increases the installation space occupied by multiple valve devices; in addition, the multiple valve combination is also prone to slow response in the operation process, and these problems affect the overall performance of the system.

[0003] Therefore, the existing valve device cannot meet the demand of high integration and high efficiency of fluid switching. SUMMARY

[0004] In order to solve the problem that the single valve device in the prior art cannot be flexibly switched between multiple fluid passages, the purpose of the utility model is to provide a valve device integrating multiple flow passage switching functions in a single valve body.

[0005] In order to realize the above-mentioned utility model purpose, an embodiment of the utility model provides a valve device, which comprises:

[0006] A plurality of external flow passage openings, the plurality of external flow passage openings at least comprises a first opening and a second opening, a first flow passage is formed between the first opening and the second opening;

[0007] A first valve core chamber is located on the first flow passage, and a first dynamic valve element for communicating or cutting off the first flow passage is arranged in the first valve core chamber, and the first dynamic valve element can be driven to rotate around a first axis;

[0008] The plurality of external flow passage openings further comprises a third opening and a fourth opening, and a second flow passage is formed between the third opening and the fourth opening;

[0009] The valve device further comprises:

[0010] A second valve core chamber is located on the second flow passage, and a second dynamic valve element for communicating or cutting off the second flow passage is arranged in the second valve core chamber;

[0011] The first valve core chamber and the second valve core chamber are arranged along the first axis, and a third flow passage is formed between the two to communicate the first valve core chamber and the second valve core chamber.

[0012] As a further improvement of the present application, the first movable valve member communicates or blocks the third flow passage during rotation.

[0013] As a further improvement of the present application, when the first movable valve member opens the first flow passage, the first movable valve member closes the third flow passage, and the second movable valve member opens the second flow passage.

[0014] When the first movable valve member closes the first flow passage, the first movable valve member opens the third flow passage, and the second movable valve member closes the second flow passage.

[0015] As a further improvement of the present application, the valve device further comprises a rotating shaft, the first movable valve member and the second movable valve member are fixed relative to the rotating shaft, and the rotating shaft simultaneously drives the first movable valve member and the second movable valve member to rotate.

[0016] As a further improvement of the present application, the valve device further comprises a lever pin, the first movable valve member comprises a through hole and a fixing groove, the rotating shaft is inserted into the through hole, the rotating shaft comprises a fixing hole, and the lever pin passes through the fixing hole and is inserted into the fixing groove.

[0017] The rotating shaft further comprises a waist-shaped end, the second movable valve member comprises a waist-shaped hole matched with the waist-shaped end, and the waist-shaped end is inserted into the waist-shaped hole.

[0018] As a further improvement of the present application, the valve device further comprises a first fixed valve member, the first fixed valve member has a first flow passage opening and a second flow passage opening, the first flow passage passes through the first flow passage opening, and the third flow passage passes through the second flow passage opening.

[0019] When the first movable valve member opens one of the first flow passage opening and the second flow passage opening, the first movable valve member closes the other one.

[0020] As a further improvement of the present application, the first fixed valve member comprises an upper wall, a partition wall and a lower wall, the partition wall is connected between the upper wall and the lower wall, a fluid passage is enclosed in the partition wall, the fluid passage communicates with the second flow passage opening, and the fluid passage is located on the third flow passage.

[0021] The partition wall outside the upper wall and the lower wall communicates the first flow passage opening and the second flow passage opening.

[0022] As a further improvement of the utility model, the first protrusion and the second protrusion are arranged on one side of the upper wall facing the first valve core chamber, the first protrusion surrounds the first flow passage opening, the second protrusion surrounds the second flow passage opening, the first protrusion and the first dynamic valve piece abutting position form the first contact surface, the second protrusion and the first dynamic valve piece abutting position form the second contact surface, and the chip groove is formed between the first protrusion and the second protrusion.

[0023] As a further improvement of the utility model, the first dynamic valve piece further comprises a plurality of support ribs, the plurality of support ribs are supported between the upper wall and the lower wall, the plurality of support ribs comprise radial support ribs and / or circumferential support ribs, and the radial support ribs and the circumferential support ribs extend substantially along the radial direction and the circumferential direction of the first dynamic valve piece.

[0024] As a further improvement of the utility model, the valve device further comprises a second dynamic valve piece, the second dynamic valve piece has a third flow passage opening, the second flow passage passes through the third flow passage opening, and the second dynamic valve piece opens or closes the third flow passage opening in the process of rotation.

[0025] Compared with the common technology, the utility model has the following beneficial effects: the valve device successfully realizes the target of integrating the multi-flow passage switching function in a single valve body, obviously reduces the occupied space, and optimizes the overall structure layout. The valve device uses two dynamic valve pieces to control the quick and efficient switching between a plurality of flow passages, realizes the complex fluid control function in the limited space, the design of the single valve device makes the manufacturing and maintenance process simpler, reduces the production and maintenance cost, provides an economic and efficient solution for the industrial fluid control system, has wide application prospect and obvious technical advantage. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the cross-sectional view of the valve device of an embodiment of the utility model in the open state of the first flow passage and the third flow passage;

[0027] Figure 2 is the cross-sectional view of the valve device of an embodiment of the utility model from another perspective;

[0028] Figure 3 is the cross-sectional view of the valve device of an embodiment of the utility model from still another perspective;

[0029] Figure 4 is the exploded view of the valve device of an embodiment of the utility model;

[0030] Figure 5 is the structural schematic view of the rotating shaft of an embodiment of the utility model;

[0031] Figure 6It is the structure schematic view of cooperation of the first dynamic valve part, the first fixed valve part and the rotating shaft of one embodiment of the utility model;

[0032] Figure 7 It is the structure schematic view of another view angle of the first fixed valve part of one embodiment of the utility model;

[0033] Figure 8 It is the structure schematic view of another view angle of the first fixed valve part of one embodiment of the utility model;

[0034] Figure 9 It is the structure schematic view of another view angle of the first fixed valve part of one embodiment of the utility model;

[0035] Figure 10 It is the structure schematic view of the second dynamic valve part opening the third flow channel mouth of one embodiment of the utility model;

[0036] Among them, 100, valve device;10, valve seat;11, first mouth;12, second mouth;13, third mouth;14, fourth mouth;20, first dynamic valve part;21, fixed groove;30, second dynamic valve part;31, waist type hole;40, first fixed valve part;41, upper wall;411, first flow channel mouth;412, second flow channel mouth;413, first protrusion;414, second protrusion;415, scrap containing groove;42, partition wall;421, fluid passage;422, radial support rib;423, circumferential support rib;43, lower wall;44, shaft hole;45, positioning shaft;410, first valve core chamber;420, second valve core chamber;50, second fixed valve part;51, third flow channel mouth;52, positioning hole;60, rotating shaft;61, fixed hole;62, waist type end;64, lever pin;70, driving mechanism;L1, first flow channel;L2, second flow channel;L3, third flow channel;L4, first axis. DETAILED DESCRIPTION

[0037] The utility model will be described in detail below in combination with the specific implementation of the drawings shown. But these implementation does not limit the utility model, the conversion of structure, method or function made by the ordinary skill in the art according to these implementation is included in the protection scope of the utility model.

[0038] It should be understood that the terms such as "upper", "above", "lower", "below" used herein to indicate the spatial relative position are for the purpose of convenient description to describe the relationship of one unit or feature relative to another unit or feature as shown in the drawings. The spatial relative position terms can be intended to include different orientation of the device in use or work except the orientation shown in the drawing.

[0039] One embodiment of the utility model provides a valve device integrated with multiple flow channel switching functions in a single valve body.

[0040] like Figure 1 As shown, a valve device 100 in this embodiment includes multiple external flow ports, a first valve core chamber 410, and a second valve core chamber 420. The multiple external flow ports include at least a first port 11, a second port 12, a third port 13, and a fourth port 14. A first flow channel L1 is formed between the first port 11 and the second port 12, and a second flow channel L2 is formed between the third port 13 and the fourth port 14. The multiple external flow ports can enable switching between different fluid paths. Figure 2 As shown, a first valve core chamber 410 is provided on the first flow channel L1, and a first moving valve 20 is installed in the first valve core chamber 410. The first moving valve 20 can rotate around the first axis L4 under the action of external drive, thereby switching between connecting or cutting off the first flow channel L1 to ensure effective control of the fluid.

[0041] To clearly express the position and direction described in this embodiment, in this embodiment, the extension direction along the first axis L4 is defined as up and down, specifically as follows: Figures 1 to 3 As shown in the valve device 100, a drive mechanism 70 is arranged at the top of the figure. The drive mechanism 70 outputs power to drive the first moving valve member 20 below to rotate. The first valve core chamber 410 is located above the second valve core chamber 420. In this way, both the first moving valve member 20 and the second moving valve member 30 (hereinafter referred to as the second moving valve member) rotate in the horizontal direction. The drive mechanism 70 may include a stepper motor, a reducer, or other structures.

[0042] Continue as Figure 2 As shown, similar to the first flow channel L1, the second flow channel L2 is provided with a second valve core chamber 420, and a second moving valve element 30 is disposed inside the second valve core chamber 420 to realize the opening or closing of the second flow channel L2. The first valve core chamber 410 and the second valve core chamber 420 are arranged along the first axis L4, and a third flow channel L3 is provided between them to connect the first valve core chamber 410 and the second valve core chamber 420.

[0043] The first valve core chamber 410 and the second valve core chamber 420 can be arranged adjacently, that is, there is no other chamber between them; or they can be arranged at intervals, that is, there is a certain distance between the first valve core chamber 410 and the second valve core chamber 420, separated by other chambers. Here, the arrangement of the first valve core chamber 410 and the second valve core chamber 420 along the first axis is not limited.

[0044] By controlling the first flow channel L1, the second flow channel L2, and the third flow channel L3 formed within the valve device 100, and by controlling the first actuating valve 20 and the second actuating valve 30, efficient switching of multiple channels can be achieved within a limited space. For example, when the first actuating valve 20 is in the open state of the first flow channel L1, the third flow channel L3 is in the closed state, and simultaneously the second actuating valve 30 opens the second flow channel L2. When the first flow channel L1 is closed, the first actuating valve 20 opens the third flow channel L3, and the second actuating valve 30 correspondingly closes the second flow channel L2. Even the first flow channel L1, the second flow channel L2, and the third flow channel L3 can all be opened simultaneously or all closed simultaneously. Because the flow channels are all formed and completely switched within the valve device 100, the valve switching stroke is reduced, resulting in a faster switching speed, and the installation of external oil pipes is also reduced, thus reducing the possibility of leakage.

[0045] This embodiment can achieve more switching functions by controlling multiple flow channels in a valve device 100. It has the advantages of compact structure, lighter overall weight, rapid fluid switching and better sealing performance, and is suitable for a variety of fluid control application scenarios.

[0046] Furthermore, to achieve more effective control over the third flow channel L3, the first moving valve 20 connects or disconnects the third flow channel L3 during rotation. When the first moving valve 20 rotates to a predetermined position, the third flow channel L3 is open, connecting the first valve core chamber 410 and the second valve core chamber 420, allowing fluid flow. When the first moving valve 20 rotates further to another predetermined position, the third flow channel L3 is closed, cutting off the connection between the first valve core chamber 410 and the second valve core chamber 420. This gives the valve device 100 greater flexibility and sealing under different operating conditions, ensuring precise control of fluid path switching.

[0047] In this embodiment, as Figure 3 As shown ( Figure 3 (The first actuating valve 20 and the second actuating valve 30 are not shown.) The first actuating valve 20 closes the other when it opens either the first flow channel L1 or the third flow channel L3. That is, when the first actuating valve 20 opens the first flow channel L1, it closes the third flow channel L3; conversely, when the first actuating valve 20 closes the first flow channel L1, it opens the third flow channel L3. This allows the fluid (medium) to switch between two different channels, ensuring that only one channel is open at any given time, thus achieving precise control of the fluid flow direction.

[0048] Further, when the first moving valve 20 opens the first flow passage L1, the first moving valve 20 closes the third flow passage L3, and the second moving valve 30 opens the second flow passage L2, so that the fluid can flow along the first flow passage L1 and the second flow passage L2 respectively, and cannot flow from the first valve core chamber 410 to the second valve core chamber 420, that is, the fluid can flow from the first port 11 to the second port 12, and from the third port 13 to the fourth port 14, but cannot flow from the first port 11 to the third port 13 or the fourth port 14.

[0049] When the first moving valve 20 closes the first flow passage L1, the first moving valve 20 opens the third flow passage L3, the first valve core chamber 410 communicates with the second valve core chamber 420, the second moving valve 30 closes the second flow passage L2, and the fluid flow between the second port 12 and the third port 13 is blocked. At this time, the fluid can only flow from the first port 11 to the third port 13, so that the valve device 100 can reliably switch between at least two different working modes, and is suitable for various fluid control scenes.

[0050] In addition, Figure 3 The flow direction of the medium in the first port 11 and the second port 12 corresponding to the first flow passage L1 can be reversed, the flow direction of the medium in the third port 13 and the fourth port 14 corresponding to the second flow passage L2 can also be reversed, and the first port 11 and the third port 13 corresponding to the third flow passage L3 can also be reversed.

[0051] Further, as shown in Figure 4 , 5 , the valve device 100 further comprises a rotating shaft 60, the first moving valve 20 and the second moving valve 30 are relatively fixed to the rotating shaft 60, and the rotating shaft 60 simultaneously drives the first moving valve 20 and the second moving valve 30 to rotate. The first moving valve 20 and the second moving valve 30 are relatively fixedly installed on the rotating shaft 60 to realize effective control of the first flow passage L1, the second flow passage L2 and the third flow passage L3. As long as the relationship between the rotation angle and the opening size of the valve is controlled, synchronous control of different opening degrees at the same angle can be realized, so that the complex structure of independent driving of multiple moving valves can be avoided, and the transmission structure of the valve device 100 is simplified.

[0052] As shown in Figure 6 , the valve device 100 further comprises a lever pin 64, the first moving valve 20 comprises a through hole and a fixed groove 21, the rotating shaft 60 is inserted into the through hole, the rotating shaft 60 comprises a fixed hole 61, the lever pin 64 passes through the fixed hole 61 and is inserted into the fixed groove 21, so that the first moving valve 20 can be stably connected with the rotating shaft 60 and rotate with the rotating shaft 60, and the cooperation of the first moving valve 20 and the lever pin 64 facilitates installation and disassembly.

[0053] Further, as shown in Figures 6 to 9 The valve device 100 further comprises a first fixed valve element 40 having a first flow passage opening 411 and a second flow passage opening 412, the first flow passage L1 passing through the first flow passage opening 411 and the third flow passage L3 passing through the second flow passage opening 412; the first movable valve element 20 closes one of the first flow passage opening 411 and the second flow passage opening 412 when opening the other one. The first movable valve element 20 of the present embodiment can move between opening the first flow passage opening 411 and opening the second flow passage opening 412, that is, the first flow passage L1 and the third flow passage L3 are not opened at the same time.

[0054] As shown in Figures 7 to 9 The first fixed valve element 40 comprises an upper wall 41, a partition wall 42 and a lower wall 43, the partition wall 42 being connected between the upper wall 41 and the lower wall 43, the partition wall 42 internally surrounding a fluid passage 421, the fluid passage 421 being communicated with the second flow passage opening 412, the fluid passage 421 being located on the third flow passage L3 so as to enable controllable flow between the first valve core chamber 410 and the second valve core chamber 420.

[0055] Between the upper wall 41 and the lower wall 43, the partition wall 42 externally forms a flow passage opposite the fluid passage 421 inside the partition wall 42, the flow passage being communicated with the first flow passage opening 411 and the second flow passage opening 412, so as to realize accurate switching of fluid passage under different rotating states of the first movable valve element 20.

[0056] As shown in Figure 3 The third flow passage L3 passes through the entire first fixed valve element 40 along the fluid passage 421 from the upper wall 41 to the lower wall 43, while the first flow passage L1 only passes through the upper wall 41 and flows out from between the upper wall 41 and the lower wall 43. In this way, the valve device 100 improves the fluid flow efficiency on the one hand, and the fluids of different flow passages cannot be mixed and backflow, on the other hand, and facilitates accurate control and switching of the first movable valve element 20.

[0057] In addition, as shown in Figure 7 A shaft hole 44 is provided at the center position of the first fixed valve element 40, the rotating shaft 60 can pass through the shaft hole 44, the upper portion of the rotating shaft 60 is connected with the driving mechanism 70, and the lower portion drives the second movable valve element 30; the cross section of the shaft hole 44 and the corresponding position of the rotating shaft 60 are both circular, a sealing ring is arranged between the two, so as to prevent medium leakage from the gap between the two.

[0058] Further, as shown in Figure 7As shown, the upper wall 41 is provided with a first protrusion 413 and a second protrusion 414 on the side facing the first spool chamber 410, the first protrusion 413 encloses the first flow passage port 411, the second protrusion 414 encloses the second flow passage port 412, and a chip groove 415 is formed between the first protrusion 413 and the second protrusion 414. Figure 7 In the embodiment, the first protrusion 413 is a fan-shaped profile enclosing the fan-shaped first flow passage port 411, and the second protrusion 414 is a fan-shaped profile enclosing the fan-shaped second flow passage port 412. Figure 7 In the embodiment, since the first protrusion 413 and the second protrusion 414 are not directly adjacent, the chip groove 415 has two parts, i.e., a large fan-shaped area and a small fan-shaped area between the first protrusion 413 and the second protrusion 414.

[0059] The first protrusion 413 and the first dynamic valve member 20 form a first contact surface at the abutting position, and the second protrusion 414 and the first dynamic valve member 20 form a second contact surface at the abutting position. The existence of the chip groove 415 not only has the effect of reducing the contact area with the first dynamic valve member 20 as described above, but also has the effect of containing chips. It can be understood that when there are impurities and chips in the fluid that cannot be discharged, the chips will be retained in the chip groove 415 under the influence of the flow direction of the fluid and gravity. If the chip groove is not provided, the chips may enter the contact surface between the first dynamic valve member 20 and the first static valve member 40, affecting the sealing effect of the contact surface.

[0060] Further, as shown, Figure 9 The first static valve member 40 further includes a plurality of support ribs, the plurality of support ribs are supported between the upper wall 41 and the lower wall 43, and the plurality of support ribs include radial support ribs 422 and / or circumferential support ribs 423, the radial support ribs 422 and the circumferential support ribs 423 extend generally along the radial direction and the circumferential direction of the first static valve member 40. Figure 9 In the embodiment, the radial support ribs 422 extend along the radial direction of the first static valve member 40, effectively dispersing the pressure load from the fluid, and the circumferential support ribs 423 extend along the circumferential direction, providing overall circumferential support capability. Preferably, the embodiment simultaneously provides the radial support ribs 422 and the circumferential support ribs 423, which improve the structural strength of the first static valve member 40 and reduce the deformation amount when subjected to pressure, thereby avoiding sealing failure or leakage between the first dynamic valve member 20 and the first static valve member 40, ensuring stable operation of the valve device 100 in a high-pressure environment, and the arrangement of the support ribs can also reduce the vibration of the valve member during fluid flow, further improving the reliability and sealing performance of the device.

[0061] As shown, Figure 4 and 10As shown, the valve device 100 further comprises a second valve fixture 50, which has a third flow passage opening 51 through which a second flow channel L2 passes, and the second valve element 30 opens or closes the third flow passage opening 51 in the process of rotation to achieve switching of the second flow channel L2. The cooperation of the first valve element 20 and the second valve element 30 precisely controls the distribution of fluid between different channels, effectively avoids mutual interference between different flow channels, and ensures the independence and stability of fluid flow. Through the reasonable arrangement of the second valve fixture 50, the valve device 100 can adapt to more diversified application scenarios and meet complex fluid control requirements.

[0062] Continuing as Figure 10 As shown, the rotating shaft 60 further comprises a waist-shaped end 62, and the second valve element 30 comprises a waist-shaped hole 31 cooperating with the waist-shaped end 62, the waist-shaped end 62 being inserted into the waist-shaped hole 31 to ensure the synchronous rotation cooperation between the second valve element 30 and the rotating shaft 60. This structure improves the assembly precision of the valve element and enhances the reliability of the overall valve device 100, preventing the risk of leakage due to loosening during long-term operation.

[0063] In the installation process of the valve device 100, the rotating shaft 60 is first inserted through the first valve fixture 40, and then the first valve element 20 and the second valve element 30 are installed on both sides of the rotating shaft 60. After the above installation is completed, the second valve fixture 50 is installed, and finally the above-mentioned installed components are integrally installed into the valve seat 10.

[0064] The second valve element 30 and the rotating shaft 60 are interference-fixed through the cooperation of the waist-shaped end 62 and the waist-shaped hole 31, which is essentially also for the consideration of facilitating the installation of the second valve fixture 50. In other words, if the second valve element 30 also adopts the installation method of the first valve element 20, there is a high probability that the first valve element 20 will fall off during installation.

[0065] In addition, the second valve fixture 50 can be provided with a circular recess aligned with the waist-shaped hole 31, and the lower end of the waist-shaped end 62 can extend through the waist-shaped hole 31 into the circular recess to facilitate the installation of the second valve fixture 50.

[0066] In addition, as Figure 8 and 10As shown, the first fixed valve 40 includes a downwardly arranged positioning shaft 45, and the second fixed valve 50 includes an upwardly arranged positioning hole 52, the positioning shaft 45 can be inserted into the positioning hole 52, on one hand, the positioning shaft 45 can limit the movement of the second moving valve 30, and ensure that it stops at the accurate expected stop; on the other hand, even in long-term work, because of repeated movement impact or part shrinkage deformation, there is a tendency of misalignment between the first fixed valve 40 and the second fixed valve 50, the cooperation of the positioning shaft 45 and the positioning hole 52 can make the positions of the two always relatively constant, so that the first fixed valve 40 and the second fixed valve 50 can accurately realize the accurate control of each flow passage even if the initial position deviates from the original position when leaving the factory, because the second moving valve 30 moves to abut against the positioning shaft 45, and the first moving valve 20 also has the same rotation angle as the second moving valve 30.

[0067] Compared with the prior art, the embodiment has the following beneficial effects:

[0068] The valve device 100 successfully realizes the goal of integrating the multi-flow passage switching function in a single valve body, significantly reduces the occupied space, and optimizes the overall structure layout. The valve device 100 uses two moving valves to control the rapid and efficient switching between multiple flow passages, realizes complex fluid control functions in limited space, and the design of the single valve device makes the manufacturing and maintenance process simpler, reduces production and maintenance costs, provides an economical and efficient solution for industrial fluid control systems, has a broad application prospect and significant technical advantages.

[0069] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

[0070] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the utility model, and they are not used to limit the protection scope of the utility model, and equivalent embodiments or changes made without departing from the spirit of the utility model art should be included in the protection scope of the utility model.

Claims

1. A valve device, comprising: a plurality of external flow passage ports, the plurality of external flow passage ports including at least a first port and a second port, a first flow passage channel being formed between the first port and the second port; a first spool chamber located on the first flow passage channel, and a first movable valve member disposed in the first spool chamber to communicate or shut off the first flow passage channel, the first movable valve member being driven to rotate about a first axis; characterized in that the plurality of external flow passage ports further include a third port and a fourth port, a second flow passage channel being formed between the third port and the fourth port; the valve device further comprising: a second spool chamber located on the second flow passage channel, and a second movable valve member disposed in the second spool chamber to communicate or shut off the second flow passage channel; the first spool chamber and the second spool chamber being arranged along the first axis, and a third flow passage channel being formed between the first spool chamber and the second spool chamber to communicate the first spool chamber and the second spool chamber.

2. The valve device according to claim 1, characterized in that the first movable valve member communicating or shutting off the third flow passage channel in the process of rotation.

3. The valve device of claim 2, wherein when the first movable valve member opens the first flow passage channel, the first movable valve member closes the third flow passage channel, and the second movable valve member opens the second flow passage channel; when the first movable valve member closes the first flow passage channel, the first movable valve member opens the third flow passage channel, and the second movable valve member closes the second flow passage channel.

4. The valve device of claim 3, wherein the valve device further comprising a rotating shaft, the first movable valve member and the second movable valve member being fixed relative to the rotating shaft, the rotating shaft simultaneously driving the first movable valve member and the second movable valve member to rotate.

5. The valve device of claim 4, wherein the valve device further comprising a shift lever pin, the first movable valve member including a through hole and a fixing groove, the rotating shaft being inserted into the through hole, the rotating shaft including a fixing hole, the shift lever pin passing through the fixing hole and being inserted into the fixing groove; the rotating shaft further including a waist-shaped end, the second movable valve member including a waist-shaped hole matched with the waist-shaped end, the waist-shaped end being inserted into the waist-shaped hole.

6. The valve device of claim 2, wherein the valve device further comprising a first fixed valve member, the first fixed valve member having a first flow passage port and a second flow passage port, the first flow passage channel passing through the first flow passage port, and the third flow passage channel passing through the second flow passage port; the first movable valve member closing one of the first flow passage port and the second flow passage port when opening the other one.

7. The valve device of claim 6, wherein the first fixed valve member including an upper wall, a partition wall and a lower wall, the partition wall being connected between the upper wall and the lower wall, a fluid passage being enclosed inside the partition wall, the fluid passage communicating the second flow passage port, the fluid passage being located on the third flow passage channel; the partition wall outside the upper wall and the lower wall communicating the first flow passage port and the second port.

8. The valve device of claim 7, wherein The upper wall is provided with a first protrusion and a second protrusion on a side facing the first spool chamber, the first protrusion surrounds the first flow passage opening, the second protrusion surrounds the second flow passage opening, the first protrusion forms a first contact surface with the abutting position of the first moving valve element, the second protrusion forms a second contact surface with the abutting position of the first moving valve element, and a chip groove is formed between the first protrusion and the second protrusion.

9. The valve device of claim 7, wherein The first fixed valve element further comprises a plurality of support ribs supported between the upper wall and the lower wall, the plurality of support ribs comprise radial support ribs and / or circumferential support ribs, the radial support ribs and the circumferential support ribs extend substantially along the radial direction and the circumferential direction of the first fixed valve element.

10. The valve device of claim 6, wherein The valve device further comprises a second fixed valve element, the second fixed valve element has a third flow passage opening, the second flow passage passes through the third flow passage opening, and the second moving valve element opens or closes the third flow passage opening in the process of rotation.

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