Valve device

Abstract

The invention discloses a valve device which comprises a valve element, a valve body assembly and a valve seat, the valve device comprises a channel cavity and a valve cavity, and the channel cavity and the valve cavity are isolated at the abutting position of the valve seat and the valve element. The valve device is provided with a containing chamber, the containing chamber is located between the valve seat and the valve body assembly in the radial direction of the channel cavity, and a sealing mechanism is arranged in the containing chamber and used for sealing between the valve seat and the valve body assembly. The accommodating chamber can be communicated with the channel cavity, or the accommodating chamber can be communicated with the valve cavity; the sealing mechanism comprises a first sealing component and a second sealing component which are oppositely arranged, each of the first sealing component and the second sealing component comprises a bottom plate part, the bottom plate parts of the two sealing components abut against the valve body assembly and the valve seat in the axial direction of the channel cavity, flanging parts are arranged on the inner edges and the outer edges of the bottom plate parts, and flanging parts are arranged on the inner edges and the outer edges of the flanging parts in the axial direction of the channel cavity. The two flanging parts of the bottom plate part are located on the same side of the bottom plate part, and the flanging parts of the two sealing components are oppositely arranged.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control, and in particular to a valve device. Background Art

[0002] The valve assembly includes a valve core, a valve body assembly, and a valve seat. The valve core is provided with an internal passage and is installed in the valve body assembly. The valve body assembly has at least two interface cavities. When the valve core is driven by an external force to rotate within the valve body assembly, the connection between the interface cavities can be switched. The valve seat and the valve core are in sealing contact, which is used to achieve a seal at the contact point between the two. A sealing ring is provided between the valve seat and the valve body assembly to achieve a seal between the two. The compression of the sealing ring will change due to the action of fluid pressure, which may cause a gap to form between the valve seat and the valve core, causing fluid leakage.

[0003] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects is still a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0004] An object of the present invention is to provide a valve device which is conducive to improving sealing performance.

[0005] To solve the above technical problems, the present invention provides a valve device, comprising a valve core, a valve body assembly, and a valve seat, the valve device comprising a channel cavity and a valve cavity, the channel cavity and the valve cavity being isolated from each other at abutment between the valve seat and the valve core; the valve device comprising a receiving chamber, radially located between the valve seat and the valve body assembly in the channel cavity, the receiving chamber being provided with a sealing mechanism for sealing between the valve seat and the valve body assembly; the receiving chamber being communicable with the channel cavity, or alternatively, the receiving chamber being communicable with the valve cavity; the sealing mechanism comprising a first sealing component and a second sealing component disposed oppositely, the first sealing component and the second sealing component each comprising a bottom plate portion, the bottom plates of the first sealing component and the second sealing component respectively abutting against the valve body assembly and the valve seat in the axial direction of the channel cavity, the inner and outer edges of the bottom plates being provided with flange portions, the two flange portions of the bottom plate portion being located on the same side of the bottom plate portion in the axial direction of the channel cavity, the flange portion of the first sealing component and the flange portion of the second sealing component being disposed facing each other.

[0006] In the above scheme, the valve device includes a first sealing component and a second sealing component, the bottom plate portions of the first sealing component and the second sealing component are respectively abutted against the valve seat and the valve body assembly, the flange portions of the first sealing component and the second sealing component are located on the same side of the bottom plate portion, and the flange portion of the first sealing component and the flange portion of the second sealing component are arranged facing each other, which is conducive to preventing the fluid in the channel cavity and the valve cavity from leaking from the accommodating chamber.

[0007] In order to solve the above technical problems, the present invention also provides a valve device, including a valve core, a valve body assembly and a valve seat, the valve device including a channel cavity and a valve cavity, the channel cavity and the valve cavity being isolated at the abutment point between the valve seat and the valve core; the valve device has a accommodating chamber, along the radial direction of the channel cavity, the accommodating chamber is located between the valve seat and the valve body assembly, a sealing mechanism is provided in the accommodating chamber for sealing between the valve seat and the valve body assembly; the accommodating chamber can be connected to the channel cavity, or the accommodating chamber can be connected to the valve cavity; the sealing mechanism includes a first sealing component and a second sealing component arranged opposite to each other, the first sealing component and the second sealing component both include a bottom plate portion, the inner edge and the outer edge of the bottom plate portion are both provided with a flange portion, along the axial direction of the channel cavity, the two flange portions of the bottom plate portion are located on the same side of the bottom plate portion, and the flange portion of the first sealing component and the flange portion of the second sealing component are arranged facing each other.

[0008] In the above scheme, the valve device includes a first sealing component and a second sealing component, and the flange portions of the first sealing component and the second sealing component are located on the same side of the bottom plate portion, and the flange portion of the first sealing component and the flange portion of the second sealing component are arranged facing each other, which is beneficial to reduce the leakage of fluid in the channel cavity and the valve cavity from the accommodating chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic structural diagram of a specific embodiment of the valve device provided by the present invention;

[0010] Figure 2 for Figure 1 Rear view;

[0011] Figure 3 for Figure 2 Cross-sectional view in the AA direction;

[0012] Figure 4 for Figure 3 The connection structure diagram of the first cover, valve core and drive shaft;

[0013] Figure 5 for Figure 3 Connection diagram of the middle valve body, second sealing cover, first valve seat, sealing mechanism and valve core;

[0014] Figure 6 is an exploded view of the third sealing cover, the second valve seat and the sealing mechanism;

[0015] Figure 7 It is a structural diagram of the sealing mechanism;

[0016] Figure 8 Schematic diagram of the structure of the first valve seat;

[0017] Figure 9 is a cross-sectional view of the second cover;

[0018] Figure 10 Schematic diagram of another embodiment of the first valve seat, the sealing mechanism and the elastic component;

[0019] Figure 11 for Figure 10 An exploded view of the first valve seat, the sealing mechanism and the elastic component;

[0020] Figure 12 for Figure 10 The connection structure diagram of the first valve seat, sealing mechanism and elastic component with the second cover and valve core.

[0021] The following are the descriptions of the reference numerals:

[0022] 1 valve core, 1a internal channel, 11 main body, 111 second opening, 112 communication port, 12 limit portion, 12a first sub-portion, 12b second sub-portion, 121 first opening, 122 balance channel;

[0023] 2 valve body assembly, 21 valve body, 22 first cover, 221 first interface cavity, 222 first mounting cavity, 223 first step surface, 23 support component, 231 support hole, 24 second cover, 241 second interface cavity, 242 second mounting cavity, 243 first axial limiter, 244 first circumferential limiter, 245 first communication channel, 246 second step surface, 25 third cover, 251 third interface cavity, 252 third mounting cavity, 253 third step surface, 26 internal seal, 27 valve cavity;

[0024] 300 valve seat, 3 first valve seat, 31 first transition connection cavity, 32 second axial limiting portion, 321 second communication channel, 33 second circumferential limiting portion; 39 third axial limiting portion;

[0025] 4 second valve seat, 41 second transition connection chamber;

[0026] 5 sealing mechanism, 50 sealing component, 51 elastic component, 52 first sealing component, 521 bottom plate portion, 522 inner flange portion, 523 outer flange portion, 53 second sealing component; 54 limiting member;

[0027] 6 actuators, 61 drive shaft;

[0028] M is the first channel cavity, N is the second channel cavity, and P is the receiving chamber. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] In the embodiments of the present invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," or "third" may explicitly or implicitly include one or more of the features.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0032] The directional terms mentioned in the embodiments of the present invention, such as "inside" and "outside", are merely references to the directions in the accompanying drawings. Therefore, the directional terms used are intended to better and more clearly illustrate and understand the embodiments of the present invention, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. Furthermore, unless otherwise specified in this application, the term "multiple" used in this application means two or more.

[0033] In the description of the embodiments of the present invention, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0034] Please refer to Figures 1-9 , Figure 1 This is a structural diagram of a specific embodiment of the valve device provided by the present invention. Figure 2 for Figure 1 The rear view, Figure 3 for Figure 2 The cross-sectional view in the AA direction, Figure 4 for Figure 3 The connection structure diagram of the first cover, valve core and drive shaft, Figure 5 for Figure 3 The connection structure diagram of the middle valve body, the second cover, the first valve seat, the sealing mechanism and the valve core, Figure 6 This is an exploded view of the third cover, the second valve seat and the sealing mechanism. Figure 7 is a structural diagram of the sealing mechanism. Figure 8is a structural diagram of the first valve seat, Figure 9 2 is a cross-sectional view of the second cover.

[0035] like Figures 1-4 As shown, the present invention provides a valve device, including a valve core 1, a valve body assembly 2, a valve seat 300, a sealing mechanism 5 and an actuator 6.

[0036] The valve body assembly 2 is the main structure of the valve device, and has an internal accommodating cavity. At least a portion of the valve core 1 and at least a portion of the valve seat 300 can be located within the accommodating cavity, thereby enabling the combined assembly of the valve core 1, valve seat 300, and valve body assembly 2. The valve body assembly 2 has a valve cavity 27, which is specifically enclosed by the valve body assembly 2, the valve core 1, and the valve seat 300. The valve core 1 is at least partially located within the valve cavity 27.

[0037] The actuator 6 is the drive structure of the valve device, which includes a drive unit and a drive shaft 61. The drive unit is located on one axial side of the valve body assembly 2 and can be connected to the drive shaft 61 to drive the drive shaft 61 to rotate. The drive shaft 61 can partially extend into the accommodating cavity of the valve body assembly 2 and can be connected to the valve core 1 (the connection method is not limited here) to drive the valve core 1 to rotate, thereby changing the operating state of the valve device. The drive unit can specifically be a motor, or of course, it can also be a rotary cylinder or other drive element capable of outputting rotational displacement, as long as it can meet the requirements of use. Taking the example of a motor as the drive unit, the motor's rotating shaft and drive shaft 61 can be an integrated structure; alternatively, the motor's rotating shaft can be connected to the drive shaft 61 via a connecting member such as a coupling to directly drive the drive shaft 61 to rotate; alternatively, a transmission component such as a gear, sprocket, or pulley can be provided between the motor's rotating shaft and the drive shaft 61 to adjust the transmission ratio between the rotating shaft and the drive shaft 61.

[0038] It should be understood that in some other embodiments, the drive shaft 61 and the valve core 1 can also be an integrated structure. In this case, a part of the valve core 1 can extend out of the accommodating cavity of the valve body assembly 2 and can be transmission-connected to the actuator 6. This is also feasible.

[0039] In the embodiment of the present invention, the valve core 1 includes a main body 11 and an extension 12. The main body 11 can be

[0040] It is roughly spherical and is arranged along the axial direction of the valve device, that is, the extending direction of the drive shaft 61. Figure 3 and Figure 4Specifically, the vertical direction is shown, with the extension 12 located on one side of the main body 11. The valve seat 300 is mounted on the valve body assembly 2 and is in contact with the main body 11, ensuring a tight seal between the valve seat 300 and the main body 11. When the main body 11 is driven to rotate, the valve seat 300 does not rotate with the main body 11; the main body 11 and the valve seat rotate relative to each other.

[0041] The valve core 1 has an internal passage 1a, a portion of which is located in the extension portion 12 and the other portion is located in the main body 11. Along the axial direction of the valve device, the internal passage 1a forms a first opening 121 at one end of the extension portion 12 that is relatively far from the main body 11. A second opening 111 may be formed at the end of the internal passage 1a that is remote from the first opening 121. The second opening 111 may be located in the main body 11.

[0042] The valve body assembly 2 also has a support hole 231. In the assembled state, at least a portion of the extension portion 12 can be located in the support hole 231. In this way, the wall forming the support hole 231 can support the extension portion 12, which can significantly improve the installation stability of the valve core 1 in the valve body assembly 2. In the closed state, the valve core 1 is not easily displaced by fluid pressure, which can reduce the pressing force between the valve core 1 and the valve seat 300 or the valve body assembly 2, thereby reducing the rotational friction of the valve core 1. This can also reduce the difficulty of driving the valve core 1, which helps to reduce the energy consumption of the actuator 6. At the same time, it can also reduce excessive wear between the valve core 1 and the valve seat 300 or the valve body assembly 2, and help to ensure the service life of the valve device.

[0043] The extension portion 12 and the wall portion forming the support hole 231 can have either a clearance fit or a tight fit, which is specifically related to the structure of the component forming the support hole 231. In an embodiment of the present invention, the valve body assembly 2 includes a support component 23, which is formed with the aforementioned support hole 231. In some embodiments, the support component 23 may be a bearing, a sleeve, or the like. In this case, the extension portion 12 and the wall portion forming the support hole 231 have a clearance fit, and relative rotation between the extension portion 12 and the wall portion forming the support hole 231 is possible. In other embodiments, the support component 23 may be a rolling bearing, etc. In this case, the support component 23 includes an inner ring and an outer ring, and rolling elements such as balls may be disposed between the inner and outer rings. Specifically, the support hole 231 may be formed by the inner ring of the support component 23. In this case, the extension portion 12 and the wall portion forming the support hole 231 have a tight fit, and the extension portion 12 can drive the inner ring to rotate synchronously.

[0044] For ease of description, the portion of the extension portion 12 located within the support hole 231 may be referred to as the first sub-portion 12a, and the portion of the extension portion 12 located outside the support hole 231 may be referred to as the second sub-portion 12b. The valve core 1 may further include a balancing channel 122, which may be disposed in the extension portion 12 and may have at least one opening formed on the outer wall of the extension portion 12. The balancing channel 122 communicates with the internal channel 1a, and further communicates with the valve cavity 27 of the valve body assembly 2. In other words, the balancing channel 122 can connect the internal channel 1a and the valve cavity 27.

[0045] With such an arrangement, when the pressure in the internal channel 1a of the extension portion 12 is too high, the pressure can be quickly released to the valve cavity 27 through the balance channel 122 to achieve pressure balance between the valve cavity 27 and the internal channel 1a, thereby effectively reducing the radial outward expansion deformation of the extension portion 12 caused by the internal and external pressure difference, and effectively reducing the force between the extension portion 12 and the wall forming the support hole 231, which can reduce the possibility of damage to the extension portion 12 and the wall forming the support hole 231, and is beneficial to ensuring the service life of the valve device; at the same time, it can also reduce the difficulty of driving the valve core 1, so as to help reduce the energy consumption of the actuator 6.

[0046] In addition, the connection between the internal channel 1a and the valve cavity 27 can quickly introduce the fluid into the valve cavity 27, which creates conditions for technical processes that require the use of fluid to improve the sealing of internal components of the valve device. In other words, it is also conducive to the realization of sealing and the improvement of sealing effect, such as the sealing at the joint between the valve seat 300 and the main body 11 (see the description below for details).

[0047] It should be understood that the entire extension portion 12 may also be located in the support hole 231 . In this case, the balancing channel 122 may be provided in the main body 11 , which can also achieve communication between the valve cavity 27 and the internal channel 1 a .

[0048] The number of the balancing channels 122 can be one or more, and can be set according to the needs of use.

[0049] exist Figure 3 and Figure 4 In the embodiment, the number of balancing channels 122 can be multiple, and each balancing channel 122 can be spaced apart along the circumference of the extension portion 12 to improve the uniformity of fluid discharge at different circumferential positions of the extension portion 12. At the same time, the fluid discharge speed can also be increased to facilitate rapid pressure balance between the valve cavity 27 and the internal channel 1a. In practice, the balancing channels 122 can be equally spaced around the circumference to further improve the uniformity of fluid flow around the extension portion 12. Of course, the balancing channels 122 can also be unequally spaced, which can reduce the difficulty of processing.

[0050] In addition to the balancing channel 122, the valve core 1 may also be provided with other communication structures to achieve communication between the internal channel 1a and the valve cavity 27. In an exemplary embodiment, Figure 3 and Figure 4 As shown, the main body 11 may further be provided with a communication port 112 , which may be communicated with the second opening 111 . The communication port 112 may also enable communication between the internal channel 1 a and the valve cavity 27 and have a throttling function.

[0051] The valve body assembly 2 includes a valve body 21 and a first sealing cover 22. The valve body 21 constitutes the main structure of the valve body assembly 2. The first sealing cover 22 can be at least partially located within the valve body 21 and can be connected to the valve body 21 by welding, snap-fitting, interference fit, threading, etc., to achieve reliable fixation of the first sealing cover 22 and the valve body 21. For connection methods that make it difficult to ensure sealing performance between the first sealing cover 22 and the valve body 21, such as threaded connection methods, an internal sealing member 26 in the form of a sealing ring or other form can be further provided between the first sealing cover 22 and the valve body 21 to ensure sealing performance between the first sealing cover 22 and the valve body 21.

[0052] The first cover 22 has an inner hole (not marked in the figure), which includes a first interface cavity 221 and a first installation cavity 222. The first interface cavity 221 and the first installation cavity 222 both extend along the axial direction of the valve device. Figure 4 As shown, the first interface cavity 221 and the first installation cavity 222 may be separated by a first step surface 223 .

[0053] The first mounting cavity 222 is installed with the aforementioned support component 23, and the support component 23 can specifically be in abutment with the first step surface 223 to limit the axial installation position of the support component 23 in the first mounting cavity 222. In fact, the extension portion 12 can also be in abutment with the first step surface 223 to limit the installation position of the extension portion 12 in the support hole 231. After the assembly is completed, the first interface cavity 221 can be connected to the first opening 121, so as to achieve the communication between the first interface cavity 221 and the internal channel 1a. In actual application, depending on the different flow directions of the fluid in the valve device, the fluid can flow from the first interface cavity 221 into the internal channel 1a, or it can flow into the first interface cavity 221 through the internal channel 1a. In other words, the first interface cavity 221 can be used as a fluid inlet or as a fluid outlet.

[0054] It should be understood that in some other implementations of the embodiments of the present invention, the valve core 1 may also include only the main body 11, that is, the extension portion 12 may not exist. In this case, the first opening 121 and the second opening 111 may both be located in the main body 11, and the first cover 22 may only include the first interface cavity 221, and the first interface cavity 221 may be connected to the first opening 121.

[0055] Combine Figure 3 The valve body assembly 2 may further include a second cover 24 and a third cover 25. Both the second cover 24 and the third cover 25 may be installed on the valve body 21. For specific installation methods, reference may be made to the aforementioned description of the first cover 22, and no repetitive description will be given here.

[0056] The second cover 24 has a second interface cavity 241, and the third cover 25 has a third interface cavity 251. The extension direction of the second interface cavity 241 and the extension direction of the first interface cavity 221 can be set at an angle, and the extension direction of the third interface cavity 251 and the extension direction of the first interface cavity 221 can also be set at an angle. Here, the embodiment of the present invention does not limit the specific values ​​of the above two angles. In actual applications, those skilled in the art can design according to specific needs, as long as it can meet the requirements of use; however, it should be noted that the above two angles should be equal, so that during the rotation of the main body 11, the second interface 111 can be connected to the second interface cavity 241 or the third interface cavity 251. In an exemplary embodiment, the angle between the extension direction of the second interface cavity 241 and the extension direction of the first interface cavity 221 can be 90 degrees, that is, the second interface cavity 241 can extend in a direction perpendicular to the axial direction of the valve device; similarly, the angle between the extension direction of the third interface cavity 251 and the extension direction of the first interface cavity 221 can also be 90 degrees, that is, the third interface cavity 251 can also extend in a direction perpendicular to the axial direction of the valve device.

[0057] The number of valve seats 300 can be two. In the embodiment of the present invention, the two valve seats 300 can be named as the first valve seat 3 and the second valve seat 4, respectively. The material of the first valve seat 3 and the second valve seat 4 is not limited here. In actual application, those skilled in the art can select it according to specific needs, as long as it can meet the requirements of use. In an exemplary embodiment, the material of the first valve seat 3 and the second valve seat 4 can be polyetheretherketone (PEEK). PEEK has a higher hardness and the contact surface with the valve core 1 can be relatively small, which is conducive to reducing friction and reducing the friction loss between the valve seat 300 and the valve core 1.

[0058] The first valve seat 3 is formed with a first transition connection cavity 31, and the second valve seat 4 is formed with a second transition connection cavity 41. Both the first valve seat 3 and the second valve seat 4 can abut against the main body 11 and can be located on opposite sides of the main body 11. The second interface cavity 241 can communicate with the first transition connection cavity 31, and the third interface cavity 251 can communicate with the second transition connection cavity 41. For ease of description, in this embodiment of the present invention, the combination of the second interface cavity 241 and the first transition connection cavity 31 may be referred to as the first channel cavity M, and the combination of the third interface cavity 251 and the second transition connection cavity 41 may be referred to as the second channel cavity N. Both the first channel cavity M and the second channel cavity N are channel cavities that can be connected or disconnected from the second opening 111. The boundary between the first channel cavity M and the valve cavity 27 is the abutment point between the first valve seat 3 and the valve core 1; that is, the first channel cavity M and the valve cavity 27 are separated at the abutment point between the first valve seat 3 and the valve core 1. The boundary between the second channel cavity N and the valve cavity 27 is the abutment point between the second valve seat 4 and the valve core 1; that is, the second channel cavity N and the valve cavity 27 are isolated at the abutment point between the second valve seat 4 and the valve core 1. In other words, the channel cavity and the valve cavity 27 are isolated at the abutment point between the valve seat 300 and the valve core 1.

[0059] During the rotation of the valve core 1, the second opening 111 can selectively communicate with the first channel cavity M or the second channel cavity N. Figure 3 Under the working condition shown, the second opening 111 is connected to the second channel cavity N, and the fluid can flow between the first interface cavity 221, the internal channel 1a and the second channel cavity N; the second channel cavity N can be in a closed state.

[0060] The structures of the second cover 24 and the third cover 25 can be consistent with the first cover 22. Figure 5 、 Figure 6 and Figure 9 As shown, the second cover 24 has an inner hole, and its inner hole may include the aforementioned second interface cavity 241 and second installation cavity 242, and the second interface cavity 241 and the second installation cavity 242 may be separated by a second step surface 246, and at least a part of the first valve seat 3 may be located in the second installation cavity 242; the third cover 25 also has an inner hole, and its inner hole may include the aforementioned third interface cavity 251 and third installation cavity 252, and the third interface cavity 251 and the third installation cavity 252 may be separated by a third step surface 253, and at least a part of the second valve seat 4 may be located in the third installation cavity 252.

[0061] The valve device comprising the second sealing cover 24, the third sealing cover 25, the first valve seat 3 and the second valve seat 4 can have a three-way function. When the second opening 111 and the first channel cavity M are connected, the first interface cavity 221 and the first channel cavity M can be connected. When the second opening 111 and the second channel cavity N are connected, the first interface cavity 221 and the second channel cavity N can be connected.

[0062] In addition, the valve device provided by the present invention may also be provided with only the second cover 24 and the first valve seat 3, or only the third cover 25 and the second valve seat 4. In this case, the valve device only has a two-way conduction function. Taking the solution of providing only the second cover 24 and the first valve seat 3 as an example, the first valve seat 3 can be located on one side of the main body 11, and the other side of the main body 11 away from the first valve seat 3 can be against the valve body 21; when the first opening 111 and the first channel cavity M are connected, the first interface cavity 221 and the first channel cavity M can be connected, enabling fluid conduction. When the first opening 111 and the first channel cavity M are offset, the first channel cavity M is blocked by the main body 11, and the first interface cavity 221 and the first channel cavity M are isolated.

[0063] A sealing mechanism 5 may be provided between the valve seat 300 and the valve body assembly 2 to achieve a seal between the valve seat 300 and the valve body assembly 2. Taking the aforementioned solution including the first valve seat 3 and the second valve seat 4 as an example, the sealing mechanism 5 may be specifically provided between the first valve seat 3 and the second sealing cover 24, and between the second valve seat 4 and the third sealing cover 25, to achieve a seal between the first valve seat 3 and the second sealing cover 24, and between the second valve seat 4 and the third sealing cover 25.

[0064] Here, the embodiment of the present invention does not limit the specific structural form of the sealing mechanism 5. In actual application, those skilled in the art can set it according to specific needs as long as it can meet the requirements of use. In an exemplary solution, the sealing mechanism 5 can be a sealing element in the form of a sealing ring or the like.

[0065] In this embodiment of the present invention, the sealing mechanism 5 may include an elastic component 51 and a sealing component 50. The sealing component 50 may be disposed on one or both axial sides of the elastic component 51. The elastic component 51 is used to compress the sealing component 50 to securely install and position the sealing component 50 and enhance the sealing effect of the sealing component 50. Simultaneously, the elastic component 51 is also used to compress the valve seat 300 against the valve core 1, thereby enhancing the sealing performance between the valve seat 300 and the valve core 1.

[0066] In other words, the elastic member 51 can have two functions, thus achieving functional integration. This can reduce the number of parts in the sealing mechanism 5, thereby effectively reducing the cost of the sealing mechanism 5, simplifying the structure of the sealing mechanism 5, and facilitating assembly of the valve device.

[0067] Combine Figure 7 The sealing component 50 may include a bottom plate portion 521, an inner flange portion 522, and an outer flange portion 523. The bottom plate portion 521 may be annular, the inner flange portion 522 may be located at the inner edge of the bottom plate portion 251, and the outer flange portion 523 may be located at the outer edge of the bottom plate portion 251, and the inner flange portion 522 and the outer flange portion 523 may be located on the same side of the bottom plate portion 521. The bottom plate portion 521 is used to position the sealing component 50, and the inner flange portion 522 and the outer flange portion 523 are used to cooperate with the bottom plate portion 521 to perform sealing. In addition, the inner flange portion 522 and the outer flange portion 523 can be flipped relative to the bottom plate portion 521 to adjust the usage state of the corresponding sealing component 50, which can provide more possibilities for the solution of fluid entering between the two sealing components 50. For example, the fluid can be controlled to impact the flange portion so that the flange portion flips, thereby introducing the fluid between the two sealing components 50.

[0068] The sealing component 50 may be specifically made of polytetrafluoroethylene (PTFE). Compared with materials such as EPDM (Ethylene Propylene Diene Monomer), PTFE is less likely to expand and deform under the action of fluid, has better stability, and is more conducive to ensuring sealing performance.

[0069] The elastic component 51 can abut against the bottom plate portion 521, thereby abutting against the valve seat 300 or the valve body assembly 2 through the bottom plate portion 521 to define the installation position of the sealing component 50. In addition, a portion of the elastic component 51 can be located between the inner flange portion 522 and the outer flange portion 523. The inner flange portion 522 and the outer flange portion 523 can also guide and limit the elastic component 51 to reduce the possibility of radial movement of the elastic component 51.

[0070] The elastic component 51 can be a linear spring, or an elastic body made of a material with a certain elastic deformation ability such as rubber. Figure 7 In the embodiment, the elastic component 51 can be a wave spring, which is specifically formed by a combination of multiple wave springs. The wave spring is small in size, can reduce the installation space, and can generate a large elastic force under a small deformation, which can reliably support the sealing component 50 and the valve core 1.

[0071] In some embodiments, the sealing mechanism 5 may not include the elastic component 51. In this case, the sealing component 50 can be connected to the valve body assembly 2 and the valve seat 300 through the bottom plate portion 521. The specific connection method can be bonding, spring positioning, etc., to achieve the installation and fixation of the sealing component 50.

[0072] The installation structure of the sealing mechanism 5 between the second cover 24 and the first valve seat 3 is similar to the installation structure of the sealing mechanism 5 between the third cover 25 and the second valve seat 4. To simplify the description, the following embodiments of the present invention only illustrate the installation structure of the sealing mechanism 5 between the second cover 24 and the first valve seat 3.

[0073] like Figure 5 As shown, the second cover 24 may include a first axial limit portion 243 and a first circumferential limit portion 244. The first axial limit portion 243 and the first circumferential limit portion 244 may enclose and form the aforementioned second mounting cavity 242. The first axial limit portion 243 has a second stepped surface 246 on a surface facing the second mounting cavity 242. The first valve seat 3 may include a second axial limit portion 32 and a second circumferential limit portion 33.

[0074] The first axial limiter 243 is further away from the valve core 1 than the second axial limiter 32. The first axial limiter 243 and the second axial limiter 32 may be arranged opposite each other. In the radial direction of the passage cavity, the first circumferential limiter 244 is further away from the passage cavity than the second circumferential limiter 33. The first circumferential limiter 244 and the second circumferential limiter 33 may be arranged opposite each other. The first axial limiter 243, the first circumferential limiter 244, the second axial limiter 32, and the second circumferential limiter 33 may enclose at least a portion of a receiving chamber P. In the radial direction of the passage cavity, the receiving chamber P is located between the valve seat 300 and the valve body assembly 2. The receiving chamber P can communicate with the passage cavity, or the receiving chamber P can communicate with the valve cavity 27, so that fluid within the passage cavity or the valve cavity 27 can be introduced into the receiving chamber P.

[0075] The sealing mechanism 5 can be specifically arranged in the accommodating chamber P, and the first circumferential limiting portion 244 and the second circumferential limiting portion 33 can both guide and limit the elastic component 51 in the sealing mechanism 5 .

[0076] Combine Figure 5 and Figure 7The sealing mechanism 5 may include two sealing components 50, which can achieve bidirectional sealing. For ease of description, the one of the two sealing components 50 that is relatively close to the valve core 1 may be referred to as the first sealing component 52, and the other of the two sealing components 50 may be referred to as the second sealing component 53. Along the axial direction of the channel cavity, the bottom plates 521 of the first sealing component 52 and the second sealing component 53 respectively abut against the valve body assembly 2 and the valve seat 300. The inner and outer edges of the bottom plates 521 are both provided with flanges. Along the axial direction of the channel cavity, the two flanges of the bottom plates 521 are located on the same side of the bottom plates 521, and the flanges of the first sealing component 52 and the second sealing component 53 are arranged facing each other. The axial ends of the elastic component 51 abut against the bottom plates 521 of the first sealing component 52 and the bottom plates 521 of the second sealing component 53, respectively, and the axial end of the elastic component 51 is located between the flanges of the first sealing component 52 and the second sealing component 53.

[0077] The bottom plate portion 521 of the first sealing component 52 abuts the second axial limit portion 32, while the bottom plate portion 521 of the second sealing component 53 abuts the first axial limit portion 243. Along the axial direction of the passage cavity, the flange portion of the first sealing component 52 extends away from the second axial limit portion 32, while the flange portion of the second sealing component 53 extends away from the first axial limit portion 243. The two flange portions of the first sealing component 52 and the first circumferential limit portion 244 and the second circumferential limit portion 33 are interference fit. The bottom plate portion 521 of the first sealing component 52 cooperates with the outer flange portion 523 to achieve a seal between the second axial limit portion 32 and the first circumferential limit portion 244. The two flange parts of the second sealing component 53 and the first circumferential limit part 244 and the second circumferential limit part 33 are also interference fit. The bottom plate part 521 and the inner flange part 522 of the second sealing component 53 cooperate with each other to achieve sealing between the first axial limit part 243 and the second circumferential limit part 33.

[0078] The valve cavity 27 is connected to the second communicating channel 321, and the second communicating channel 321 is connected to the accommodating chamber P on the side of the first sealing component 53 relatively close to the valve core 1; the channel cavity is connected to the first communicating channel 245, and the first communicating channel 245 is connected to the accommodating chamber P on the side of the second sealing component 52 relatively away from the valve core 1.

[0079] The second cover 24 is further provided with a first communication channel 245, which is used to connect the accommodating chamber P and the first channel chamber M. In this way, when the first channel chamber M serves as a fluid inlet and is closed by the main body 11 of the valve core 1, the fluid in the first channel chamber M can flow into the accommodating chamber P through the first communication channel 245 to maintain pressure balance between the accommodating chamber P and the first channel chamber M. The fluid entering the accommodating chamber P can cooperate with the elastic component 51 to better compress the first sealing component 52, thereby improving the sealing effect of the first sealing component 52 between the first circumferential limit portion 244 and the second axial limit portion 32. In addition, the fluid in the accommodating chamber P can also compress the first valve seat 3 to improve the sealing performance between the first valve seat 3 and the main body 11.

[0080] The setting position of the first connecting channel 245 is not limited here. In specific practice, those skilled in the art can set it according to actual needs, as long as the technical purpose of connecting the accommodating chamber P and the first channel cavity M can be achieved.

[0081] In the embodiment of the accompanying drawings, Figure 5 and Figure 9 As shown, the first communication channel 245 can be a sunken groove provided on the second stepped surface 246. Thus, in the absence of external force, the bottom plate portion 521 and the inner flange portion 522 of the second sealing component 53 cooperate to shield the first communication channel 245. When the second opening 111 is connected to the first channel cavity M, the first channel cavity M can be connected to the internal channel 1a, and fluid will not accumulate in the first channel cavity M. The second sealing component 53 can block the first communication channel 245. When the main body 11 blocks the first channel cavity M and the first channel cavity M is the fluid inlet, the fluid pressure in the first channel cavity M is relatively large, and the fluid can impact the second sealing component 53 through the first connecting channel 245, causing the inner flange portion 522 of the second sealing component 53 to fold, thereby introducing the fluid into the receiving chamber P. The fluid entering the receiving chamber P can cooperate with the elastic component 51 to press the first sealing component 52 to improve the sealing between the second cover 24 and the first valve seat 3. At the same time, the fluid can also cooperate with the elastic component 51 to press the first valve seat 3 to ensure the sealing performance between the first valve seat 3 and the main body 11 in the closed valve state, which can reduce fluid leakage between the first valve seat 3 and the main body 11.

[0082] Please continue to refer to Figure 5, the inner diameter of the contact position between the first valve seat 3 and the main body portion 11 can be denoted as D1, and the inner diameter of the second installation cavity 242 can be denoted as D2, where D1 < D2. In this way, the fluid in the accommodation chamber P can provide a better pressing effect on the first sealing member 52 and the first valve seat 3, which is more conducive to ensuring the seal between the first valve seat 3 and the second cover 24, as well as the seal between the first valve seat 3 and the main body portion 11.

[0083] The first valve seat 3 can be provided with a second communication channel 321 for communicating the valve cavity 27 and the accommodation chamber P. In this way, when the first interface cavity 241 serves as a fluid outlet and the first interface cavity 241 is closed by the main body portion 11 of the valve element 1, the fluid in the valve cavity 27 can flow into the accommodation chamber P through the second communication channel 321 to maintain the pressure balance between the accommodation chamber P and the valve cavity 27. The fluid entering the accommodation chamber P can cooperate with the elastic member 51 to better press the second sealing member 53, which can improve the sealing effect of the second sealing member 53 between the second circumferential limiting portion 33 and the first axial limiting portion 243.

[0084] The setting position of the second communication channel 321 is not limited either. In specific practice, those skilled in the art can set it according to actual needs as long as it can achieve the technical effect of communicating the accommodation chamber P and the valve cavity 27.

[0085] In the embodiment of the drawings, as Figure 5 shown, the second communication channel 231 can be provided in the second axial limiting portion 32. For example, it can be provided on the outer peripheral wall surface of the second axial limiting portion 32. In this way, the first sealing member 53 can also block the second communication channel 231. When the second opening 111 is connected to the first channel cavity M, the first channel cavity M can be connected to the internal channel 1a, and the fluid will not accumulate in the valve cavity 27. The first sealing member 52 can block the second communication channel 231. When the main body portion 11 blocks the first channel cavity M, the internal pressure in the valve cavity 27 has nowhere to be released, and it will impact the first sealing member 52 through the second communication channel 231, causing the outward turning edge portion 523 of the second sealing member 53 to turn over, and then guiding the fluid into the accommodation chamber P to maintain the pressure balance between the accommodation chamber P and the valve cavity 27. In this way, it can preferably avoid the generation of a gap between the first valve seat 3 and the main body portion 11 due to the impact of the fluid in the valve cavity 27 on the first valve seat 3 and the resulting leakage problem; and the fluid entering the accommodation chamber P will also cooperate with the elastic member 51 to press the second sealing member 53 to improve the sealing performance between the second circumferential limiting portion 33 and the first axial limiting portion 243.

[0086] Please continue to refer to Figure 5The outer diameter of the second circumferential limit portion 33 can be recorded as D3, D1≥D3, so that the fluid entering the accommodating chamber P can better generate a driving force on the first valve seat 3, so as to drive the first valve seat 3 and the main body 11 to be pressed together, and can better drive the second sealing component 53 to seal.

[0087] like Figure 10-12 As shown, in another embodiment of the valve device, the valve body assembly 2 includes a first axial limit portion 243, the valve seat 300 includes a second axial limit portion 32, and the valve seat 300 also includes a third axial limit portion 39. The third axial limit portion 39 protrudes from the outer periphery of the valve seat 300. Specifically, the third axial limit portion 39 protrudes from the second circumferential limit portion 33 along the radial direction of the channel cavity.

[0088] by Figure 12 Taking the first channel cavity M in the figure as an example, the valve device has a accommodating chamber P. Along the radial direction of the first channel cavity M, the accommodating chamber P is located between the valve seat 300 and the valve body assembly 2. A sealing mechanism 5 is provided in the accommodating chamber P for sealing between the valve seat 300 and the valve body assembly 2; the accommodating chamber P can be communicated with the first channel cavity M, or the accommodating chamber P can be communicated with the valve cavity 27; the sealing mechanism 5 includes a first sealing component 52 and a second sealing component 53 arranged opposite to each other, and the first sealing component 52 and the second sealing component 53 both include a bottom plate portion 521, and the inner edge and the outer edge of the bottom plate portion 521 are both provided with a flange portion, and along the axial direction of the first channel cavity M, the two flange portions of the bottom plate portion 521 are located on the same side of the bottom plate portion 521, and the flange portion of the first sealing component 52 and the flange portion of the second sealing component 53 are arranged facing each other.

[0089] like Figure 10-12 As shown, along the axial direction of the first channel cavity M, the elastic component 51 and the sealing mechanism 5 are respectively located on both sides of the third axial limiting portion 39, one axial end of the elastic component 51 abuts against the first axial limiting portion 243, and the other axial end of the elastic component 51 abuts against the third axial limiting portion 39. Along the axial direction of the first channel cavity M, the sealing mechanism 5 is located between the third axial limiting portion 39 and the second axial limiting portion 32.

[0090] like Figure 10-12As shown, the sealing mechanism 5 further includes two limiting members 54, which are respectively used to limit the first sealing component 52 and the second sealing component 53. Specifically, the limiting member 54 is annular and surrounds the valve seat 300 along the circumference of the first channel cavity M. The flange portion includes an inner flange portion 522 and an outer flange portion 523. The limiting member 54 surrounds the inner flange portion 522 and abuts the inner flange portion 522, which abuts the valve seat 300. That is, at least a portion of the inner flange portion 522 is sandwiched between the limiting member 54 and the valve seat 300, thereby limiting the movement of the first sealing component 52 and the second sealing component 53 relative to the valve seat 300 and reducing the risk of failure of the first sealing component 52 and the second sealing component 53. The limiting member 54 can be made of metal and have a certain degree of elasticity.

[0091] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A valve device, characterized in that: The valve device comprises a valve core (1), a valve body assembly (2) and a valve seat (300), wherein the valve device comprises a channel cavity and a valve cavity (27), wherein the channel cavity and the valve cavity (27) are isolated from each other at the abutment portion between the valve seat (300) and the valve core (1); The valve device comprises a receiving chamber (P), and along the radial direction of the channel cavity, the receiving chamber (P) is located between the valve seat (300) and the valve body assembly (2), and a sealing mechanism (5) is arranged in the receiving chamber (P) for sealing between the valve seat (300) and the valve body assembly (2); the receiving chamber (P) can be connected to the channel cavity, or the receiving chamber (P) can be connected to the valve cavity (27); The sealing mechanism (5) comprises a first sealing component (52) and a second sealing component (53) which are arranged opposite to each other. The first sealing component (52) and the second sealing component (53) both comprise a bottom plate portion (521). Along the axial direction of the channel cavity, the bottom plate portions (521) of the first sealing component (52) and the second sealing component (53) are respectively in contact with the valve body assembly (2) and the valve seat (300). The inner edge and the outer edge of the bottom plate portion (521) are both provided with flange portions. Along the axial direction of the channel cavity, the two flange portions of the bottom plate portion (521) are located on the same side of the bottom plate portion (521). The flange portion of the first sealing component (52) and the flange portion of the second sealing component (53) are arranged facing each other.

2. The valve device according to claim 1, characterized in that: The sealing mechanism (5) further comprises an elastic component (51), the axial ends of the elastic component (51) respectively abutting against the bottom plate portion (521) of the first sealing component (52) and the bottom plate portion (521) of the second sealing component (53), and the axial end portion of the elastic component (51) is located between the two flange portions of the first sealing component (52) and the second sealing component (53).

3. The valve device according to claim 2, characterized in that: The valve body assembly (2) includes a first axial limit portion (243), and the valve seat (300) includes a second axial limit portion (32). The first axial limit portion (243) is farther away from the valve core (1) than the second axial limit portion (32). The bottom plate portion (521) of the first sealing component (52) abuts against the second axial limit portion (32), and the bottom plate portion (521) of the second sealing component (53) abuts against the first axial limit portion (243). Along the axial direction of the channel cavity, the flange portion of the first sealing component (52) extends away from the second axial limit portion (32), and the flange portion of the second sealing component (53) extends away from the first axial limit portion (243).

4. The valve device according to claim 3, characterized in that: The valve body assembly (2) includes a first circumferential limit portion (244), and the valve seat (300) includes a second circumferential limit portion (33). Along the radial direction of the channel cavity, the first circumferential limit portion (244) is farther away from the channel cavity than the second circumferential limit portion (33). The first axial limit portion (243), the first circumferential limit portion (244), the second axial limit portion (32) and the second circumferential limit portion (33) enclose at least a part of the accommodating chamber (P). The two flange portions of the first sealing component (52) are respectively abutted against the first circumferential limit portion (244) and the second circumferential limit portion (33), and the two flange portions of the second sealing component (53) are respectively abutted against the first circumferential limit portion (244) and the second circumferential limit portion (33).

5. The valve device according to any one of claims 1 to 4, characterized in that: The valve body assembly (2) is provided with a first communication channel (245), and the valve seat is provided with a second communication channel (321); The first sealing component (52) is closer to the valve core (1) than the second sealing component (53); the valve cavity (27) is connected to the second connecting passage (321), and the second connecting passage (321) is connected to the accommodating chamber (P) on the side of the first sealing component (53) relatively close to the valve core (1); the channel cavity is connected to the first connecting passage (245), and the first connecting passage (245) is connected to the accommodating chamber (P) on the side of the second sealing component (52) relatively far from the valve core (1).

6. The valve device according to claim 5, characterized in that: The first communication channel (245) is arranged at a first axial limit portion (243) of the valve body assembly, and the second communication channel (321) is arranged at a second axial limit portion (32) of the valve seat (300).

7. The valve device according to claim 5, characterized in that: The first axial limiting portion (243) has a step surface facing the sealing mechanism (5), the first connecting channel (245) is a recessed groove arranged on the step surface, and the second connecting channel (321) is arranged on the outer peripheral wall surface of the second axial limiting portion (32).

8. The valve device according to any one of claims 1 to 7, characterized in that: The sealing component is made of polytetrafluoroethylene.

9. The valve device according to any one of claims 1 to 7, characterized in that: The valve body assembly (2) comprises a valve body (21) and a first cover (22), wherein the first cover (22) is mounted on the valve body (21), the inner hole of the first cover (22) comprises the first interface cavity (221), the end of the internal channel (1a) close to the first cover (22) is formed with a first opening (121), and the first interface cavity (221) and the first opening (121) are in communication; The valve body assembly (2) comprises a first interface cavity (221) and a second interface cavity (241), the first interface cavity (221) and the valve cavity (27) are connected, and the first interface cavity (221) is also connected to the internal channel (1a), the extension direction of the second interface cavity (241) and the extension direction of the first interface cavity (221) are arranged at an angle, the valve seat is formed with a transition connection cavity, and the second interface cavity (241) and the transition connection cavity are connected to form the channel cavity; A second opening (111) is formed at one end of the internal channel (1a) away from the first interface cavity (221), and the second opening (111) can be connected to or disconnected from the channel cavity.

10. The valve device according to any one of claims 1 to 7, characterized in that: The valve body assembly (2) comprises a first interface cavity (221), a second interface cavity (241) and a third interface cavity (251); the first interface cavity (221) is in communication with the valve cavity (27), and the first interface cavity (221) is also in communication with the internal passage (1a); an extension direction of the second interface cavity (241) and an extension direction of the first interface cavity (221) are arranged at an angle, and an extension direction of the third interface cavity (251) and an extension direction of the first interface cavity (221) are arranged at an angle; A second opening (111) is formed at one end of the internal channel (1a) away from the first interface cavity (221); the number of the valve seats is two, namely a first valve seat (3) and a second valve seat (4); the sealing mechanism (5) is provided between the first valve seat (3) and the valve body assembly (2), and between the second valve seat (4) and the valve body assembly (2); the first valve seat (3) forms a first transition connection cavity (31), and the second valve seat (4) forms a second transition connection cavity (41); the second interface cavity (241) and the first transition connection cavity (31) are connected to form a first channel cavity (M); the third interface cavity (251) and the second transition connection cavity (41) are connected to form a second channel cavity (N); the channel cavity includes the first channel cavity (M) and the second channel cavity (N); the second opening (111) can be connected to or disconnected from the first channel cavity (M), and the second opening (111) can be connected to or disconnected from the second channel cavity (N).

11. A valve device, characterized in that: The valve device comprises a valve core (1), a valve body assembly (2) and a valve seat (300), wherein the valve device comprises a channel cavity and a valve cavity (27), wherein the channel cavity and the valve cavity (27) are isolated from each other at the abutment portion between the valve seat (300) and the valve core (1); The valve device comprises a receiving chamber (P), and along the radial direction of the channel cavity, the receiving chamber (P) is located between the valve seat (300) and the valve body assembly (2), and a sealing mechanism (5) is arranged in the receiving chamber (P) for sealing between the valve seat (300) and the valve body assembly (2); the receiving chamber (P) can be connected to the channel cavity, or the receiving chamber (P) can be connected to the valve cavity (27); The sealing mechanism (5) comprises a first sealing component (52) and a second sealing component (53) which are arranged opposite to each other, wherein the first sealing component (52) and the second sealing component (53) both comprise a bottom plate portion (521), wherein the inner edge and the outer edge of the bottom plate portion (521) are both provided with flange portions, and along the axial direction of the channel cavity, the two flange portions of the bottom plate portion (521) are located on the same side of the bottom plate portion (521), and the flange portion of the first sealing component (52) and the flange portion of the second sealing component (53) are arranged facing each other.

12. The valve device according to claim 11, characterized in that The valve body assembly (2) includes a first axial limit portion (243), and the valve seat (300) includes a second axial limit portion (32) and a third axial limit portion (39); the valve device includes an elastic component (51), and along the axial direction of the channel cavity, the elastic component (51) and the sealing mechanism (5) are respectively located on both sides of the third axial limit portion (39), one axial end of the elastic component (51) abuts against the first axial limit portion (243), and the other axial end of the elastic component (51) abuts against the third axial limit portion (39), and along the axial direction of the channel cavity, the sealing mechanism (5) is located between the third axial limit portion (39) and the second axial limit portion (32).

13. The valve device according to claim 12, characterized in that The sealing mechanism (5) comprises two limiting members (54), the limiting members (54) are annular, the limiting members (54) surround the valve seat (300) along the circumference of the channel cavity, the flange portion comprises an inner flange portion (522), the limiting member (54) surrounds the inner flange portion (522), and at least a portion of the inner flange portion (522) is sandwiched between the limiting member (54) and the valve seat (300).

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