Valve device

Abstract

The invention discloses a valve device which comprises a valve element and a valve body assembly, the valve body assembly is provided with a valve cavity, at least part of the valve element is located in the valve cavity, the valve element comprises a main body part and an extension part, and the extension part is located on one side of the main body part in the axial direction of the valve device; the valve element is provided with an inner channel and a balance channel, and in the axial direction of the valve device, the inner channel is provided with a first opening in the end, relatively away from the main body part, of the extension part; the valve body assembly comprises a supporting component, the supporting component is provided with a supporting hole, at least part of the extending part is located in the supporting hole, the balance channel is communicated with the inner channel, and the balance channel is communicated with a valve cavity of the valve body assembly. According to the valve device, friction loss can be reduced, and driving energy consumption can be reduced.

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 core of the valve device is provided with an internal passage and is installed in the valve body assembly; the valve body assembly has at least two interface cavities, and when the valve core is driven by an external force to rotate in the valve body assembly, the connection state between the interface cavities can be switched; the valve seat and the valve core are in sealing contact, which is used to achieve the sealing at the contact between the two. When the valve core closes the corresponding interface cavity, the valve core is easily moved by the pressure of the fluid in the corresponding interface cavity, resulting in a greater pressing force between the valve core and the valve seat or valve body assembly and other matching parts, resulting in a larger rotation friction of the valve core, which is not conducive to the driving of the valve core; and in the process of the valve core rotating, the valve core and the valve seat / valve body assembly will be excessively worn.

[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] The object of the present invention is to provide a valve device which can reduce friction loss and drive energy consumption.

[0005] In order to solve the above technical problems, the present invention provides a valve device, including a valve core and a valve body assembly, the valve body assembly having a valve cavity, at least part of the valve core being located in the valve cavity, the valve core comprising a main body and an extension portion, along the axial direction of the valve device, the extension portion being located on one side of the main body; the valve core having an internal channel and a balancing channel, along the axial direction of the valve device, the internal channel having a first opening at one end of the extension portion relatively away from the main body, and the internal channel having a second opening on the outer wall of the main body; the valve body assembly comprising a supporting component, the supporting component having a supporting hole, at least part of the extension portion being located in the supporting hole, the balancing channel being connected to the internal channel, and the balancing channel being connected to the valve cavity of the valve body assembly.

[0006] In the above scheme, the valve core also includes an extension portion, and can be installed in the support hole of the valve body assembly support component through the extension portion. The support component can support the extension portion, which can improve the installation stability of the valve core in the valve body assembly. In the valve closing state, the valve core is not easy to produce relative displacement due to fluid pressure, which can reduce the clamping force between the valve core and the valve seat or the valve body assembly, and can also reduce the rotational friction of the valve core, thereby reducing the difficulty of driving the valve core, which is beneficial to reducing the driving energy consumption of the valve device. At the same time, it can also reduce excessive wear between the valve core and the valve seat or valve body assembly and other matching parts, and is also beneficial to ensure the service life of the valve device.

[0007] In addition, the valve core is also provided with a balancing channel, which can connect the internal channel and the valve cavity. When the pressure in the internal channel is too high, the pressure can be quickly released to the valve cavity through the balancing channel to achieve pressure balance between the valve cavity and the internal channel, thereby effectively reducing the radial outward expansion deformation of the valve core, and effectively reducing the force between the valve core and other matching components, thereby reducing the difficulty of driving the valve core, which is conducive to reducing the driving energy consumption of the valve device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A schematic structural diagram of a specific implementation of the valve device provided by the present invention;

[0009] Figure 2 for Figure 1 Rear view of

[0010] Figure 3 for Figure 2 Section view in AA direction;

[0011] Figure 4 for Figure 3 A connection structure diagram of the first cover, the valve core and the drive shaft;

[0012] Figure 5 for Figure 3 A connection structure diagram of the middle valve body, the second sealing cover, the first valve seat, the sealing mechanism and the valve core;

[0013] Figure 6 is an exploded view of the third sealing cover, the second valve seat and the sealing mechanism;

[0014] Figure 7 It is a structural schematic diagram of the sealing mechanism;

[0015] Figure 8 is a structural schematic diagram of the first valve seat;

[0016] Fig. 9 is a cross-sectional view of the second cover.

[0017] The following are the descriptions of the reference numerals:

[0018] 1 valve core, 1a internal channel, 11 main body, 111 second opening, 12 limiting portion, 12a first sub-portion, 12b second sub-portion, 121 first opening, 122 balance channel;

[0019] 2 valve body assembly, 21 valve body, 22 first cover, 221 first interface cavity, 222 first installation cavity, 223 first step surface, 23 support component, 231 support hole, 24 second cover, 241 second interface cavity, 242 second installation cavity, 243 first axial limiting portion, 244 first circumferential limiting portion, 245 first communication channel, 246 second step surface, 25 third cover, 251 third interface cavity, 252 third installation cavity, 253 third step surface, 26 internal sealing component, 27 valve cavity;

[0020] 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;

[0021] 4 second valve seat, 41 second transition connection chamber;

[0022] 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;

[0023] 6 actuators, 61 drive shafts;

[0024] M is the first channel cavity, N is the second channel cavity, and P is the receiving chamber. DETAILED DESCRIPTION

[0025] 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 in conjunction with the accompanying drawings and specific embodiments.

[0026] In the embodiments of the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0027] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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.

[0028] The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", etc., are only references to the directions of the drawings. Therefore, the directional terms used are for better and clearer description and understanding of the embodiments of the present invention, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention. In addition, unless otherwise specified in this application, the "multiple" mentioned in this application refers to two or more.

[0029] In the description of the embodiments of the present invention, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0030] Please refer to Figure 1-Figure 9 , Figure 1 This is a schematic structural diagram of a specific implementation of the valve device provided by the present invention. Figure 2 for Figure 1 The rear view of 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 is an exploded view of the third sealing cover, the second valve seat and the sealing mechanism, Figure 7 is a structural diagram of the sealing mechanism. Figure 8 is a schematic diagram of the structure of the first valve seat, Fig. 9 is a cross-sectional view of the second cover.

[0031] like Figure 1-Figure 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.

[0032] The valve body assembly 2 is the main structure of the valve device, and an accommodating cavity is formed inside the valve body assembly 2. At least part of the valve core 1 and at least part of the valve seat 300 can be located in the accommodating cavity, so as to realize the combined assembly of the valve core 1, the valve seat 300 and the valve body assembly 2. The valve body assembly 2 has a valve cavity 27, which is specifically formed by the valve body assembly 2, the valve core 1 and the valve seat 300, and the valve core 1 is at least partially located in the valve cavity 27.

[0033] The actuator 6 is a driving structure of the valve device, which includes a driving part and a driving shaft 61. The driving part is located on one side of the axial direction of the valve body assembly 2, and can be connected to the driving shaft 61 in a transmission manner to drive the driving shaft 61 to rotate. The driving 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 working state of the valve device. The driving part can be a motor, of course, it can also be other driving elements that can output rotational displacement, such as a rotary cylinder, as long as it can meet the requirements of use. Taking the driving part as an example, the motor shaft and the driving shaft 61 can be an integrated structure; or, the motor shaft can also be connected to the driving shaft 61 through a coupling or other connecting member to directly drive the driving shaft 61 to rotate; or, a transmission component in the form of a gear, a sprocket, a pulley, etc. can also be set between the motor shaft and the driving shaft 61 to adjust the transmission ratio between the shaft and the driving shaft 61.

[0034] 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 with the actuator 6, which is also feasible.

[0035] In the embodiment of the present invention, the valve core 1 includes a main body 11 and an extension 12. The main body 11 may be substantially spherical and is spherical in shape along the axial direction of the valve device, that is, the extension direction of the drive shaft 61. Figure 3 and Figure 4 Specifically, the vertical direction is shown in FIG. 1 , and the extension portion 12 is located on one side of the main body 11. The valve seat 300 is installed on the valve body assembly 2 and can contact the main body 11, thereby ensuring the sealing performance of the contact 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, and the main body 11 and the valve seat 300 rotate relative to each other.

[0036] The valve core 1 has an internal channel 1a, a part of which is located in the extension portion 12, and the other part is located in the main body 11. Along the axial direction of the valve device, the internal channel 1a is formed with a first opening 121 at one end of the extension portion 12 relatively far from the main body 11. A second opening 111 may be formed at one end of the internal channel 1a far from the first opening 121, and the second opening 111 may be located in the main body 11.

[0037] The valve body assembly 2 also has a support hole 231. In the assembled state, at least part of the extension 12 can be located in the support hole 231. In this way, the wall used to form the support hole 231 can support the extension 12, which can greatly improve the installation stability of the valve core 1 in the valve body assembly 2. In the valve-off state, the valve core 1 is not easy to produce relative displacement due to fluid pressure, which can reduce the pressing force between the valve core 1 and the valve seat 300 or the valve body assembly 2, and can also reduce the rotation friction of the valve core 1, thereby reducing the difficulty of driving the valve core 1, which is conducive to reducing 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 is also conducive to ensuring the service life of the valve device.

[0038] The extension part 12 and the wall part for forming the support hole 231 may be a clearance fit or a tight fit, which is specifically related to the structure of the part forming the support hole 231. In the embodiment of the present invention, the valve body assembly 2 includes a support part 23, and the support part 23 is formed with the above-mentioned support hole 231. In some embodiments, the support part 23 may be a bearing, a sleeve, etc., in which case the extension part 12 and the wall part for forming the support hole 231 are clearance fit, and the extension part 12 and the wall part for forming the support hole 231 can rotate relative to each other. In other embodiments, the support part 23 may be a rolling bearing, etc., in which case the support part 23 includes an inner ring and an outer ring, and a rolling body such as a ball may be arranged between the inner ring and the outer ring. The support part 23 may specifically be formed by the inner ring to form the support hole 231. In this case, the extension part 12 and the wall part for forming the support hole 231 are tight fit, and the extension part 12 can drive the inner ring to rotate synchronously.

[0039] For ease of description, the portion of the extension 12 located in the support hole 231 may be referred to as the first sub-portion 12a, and the portion of the extension 12 located outside the support hole 231 may be referred to as the second sub-portion 12b. The extension 12 includes the first sub-portion 12a and the second sub-portion 12b, and the second sub-portion 12b is closer to the main body 11 than the first sub-portion 12a. The valve core 1 may also have a balancing channel 122, which may be provided in the extension 12, and may be formed with at least one opening on the outer wall surface of the extension 12. The balancing channel 122 is connected to the internal channel 1a, and the balancing channel 122 is connected to the valve cavity 27 of the valve body assembly 2. In other words, the balancing channel 122 may connect the internal channel 1a and the valve cavity 27.

[0040] With such 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, which 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 reduce the energy consumption of the actuator 6.

[0041] In addition, the connection between the internal channel 1a and the valve chamber 27 can quickly introduce the fluid into the valve chamber 27, which creates conditions for the technical process that requires the use of fluid to improve the sealing of the 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).

[0042] 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 .

[0043] The number of the balancing channels 122 may be one or more, and may be specifically set according to the needs of use.

[0044] exist Figure 3 and Figure 4 In the embodiment, the number of the balancing channels 122 can be multiple, and each balancing channel 122 can be arranged at intervals along the circumference of the extension portion 12 to improve the uniformity of the fluid discharged at different positions of the extension portion 12 in the circumference. At the same time, the discharge speed of the fluid can also be improved to facilitate the rapid realization of the pressure balance between the valve cavity 27 and the internal channel 1a. In specific practice, each balancing channel 122 can be distributed at equal intervals in the circumference to further improve the uniformity of the fluid in the circumference of the extension portion 12; of course, each balancing channel 122 can also be distributed at unequal intervals, so that the processing difficulty can be reduced.

[0045] 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. Figure 3 and Figure 4 As shown, the main body 11 may also be provided with a communication port 112 , which may be communicated with the second opening 111 . The communication port 112 may also realize the communication between the internal channel 1 a and the valve chamber 27 , and has a throttling function.

[0046] 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 in the valve body 21, and can be connected to the valve body 21 by welding, clamping, interference fit, threaded connection, etc., so as to achieve reliable fixation of the first sealing cover 22 and the valve body 21. For a connection method that is not easy to ensure the sealing performance between the first sealing cover 22 and the valve body 21, such as a threaded connection method, an internal sealing member 26 in the form of a sealing ring or the like can be further provided between the first sealing cover 22 and the valve body 21 to ensure the sealing performance between the first sealing cover 22 and the valve body 21.

[0047] The first cover 22 has an inner hole (not marked in the figure), and the inner hole 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 .

[0048] The first mounting cavity 222 is installed with the aforementioned support component 23, and the support component 23 can specifically be in contact 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 contact with the first step surface 223 to limit the installation position of the extension portion 12 in the support hole 231. After assembly, the first interface cavity 221 can be connected to the first opening 121, so that the first interface cavity 221 and the internal channel 1a can be connected. In actual application, according to 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.

[0049] Combination 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. The specific installation method may refer to the aforementioned description of the first cover 22, and no repetitive description is given here.

[0050] 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 practical applications, those skilled in the art can design according to specific needs as long as they can meet the requirements of use; but 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 with 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.

[0051] The number of valve seats 300 may be two. In the embodiment of the present invention, the two valve seats 300 may be named as the first valve seat 3 and the second valve seat 4, respectively. The materials of the first valve seat 3 and the second valve seat 4 may not be limited here. In practical applications, those skilled in the art may select them according to specific needs, as long as they can meet the requirements of use. In an exemplary solution, the material of the first valve seat 3 and the second valve seat 4 may be polyetheretherketone (PEEK). PEEK has a higher hardness, and the contact surface with the valve core 1 may be relatively small, which is conducive to reducing friction, so as to reduce the friction loss between the valve seat 300 and the valve core 1.

[0052] 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. The first valve seat 3 and the second valve seat 4 can both abut against the main body 11 and can be distributed on opposite sides of the main body 11. The second interface cavity 241 can be connected to the first transition connection cavity 31, and the third interface cavity 251 can be connected to the second transition connection cavity 41. For ease of description, in the embodiment of the present invention, the combination of the second interface cavity 241 and the first transition connection cavity 31 can 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 can be referred to as the second channel cavity N. The first channel cavity M and the second channel cavity N are both channel cavities that can be connected or disconnected with the second opening 111. The boundary position between the first channel cavity M and the valve cavity 27 is the abutment position of the first valve seat 3 and the valve core 1. The boundary position between the second channel cavity N and the valve cavity 27 is the abutment position of the second valve seat 4 and the valve core 1.

[0053] 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.

[0054] 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 Fig. 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.

[0055] The valve device including the second cover 24, the third 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.

[0056] 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 the function of two-way conduction. Taking the scheme of only providing the second cover 24 and the first valve seat 3 as an example, the first valve seat 3 may 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 may 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 may be connected, and the conduction of the fluid can be realized. When the first opening 111 and the first channel cavity M are staggered, 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.

[0057] A sealing mechanism 5 may be provided between the valve seat 300 and the valve body assembly 2 to achieve sealing 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 sealing 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.

[0058] Here, the embodiment of the present invention does not limit the specific structural form of the sealing mechanism 5. In practical applications, 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.

[0059] In the embodiment of the present invention, the sealing mechanism 5 may include an elastic component 51 and a sealing component 50, and the sealing component 50 may be arranged on one axial side or both axial sides of the elastic component 51. The elastic component 51 is used to compress the sealing component 50 to install and position the sealing component 50, and to improve the sealing effect of the sealing component 50. At the same time, the elastic component 51 is also used to compress the valve seat 300 against the valve core 1 to improve the sealing performance between the valve seat 300 and the valve core 1.

[0060] That is to say, the elastic component 51 can have two functions, and can realize functional integration. In this way, the number of parts in the sealing mechanism 5 can be reduced, and the cost of the sealing mechanism 5 can be effectively reduced, and the structure of the sealing mechanism 5 can be simplified, and the assembly of the valve device can be facilitated.

[0061] Combination 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 in the shape of a ring, the inner flange portion 522 may be located at the inner edge of the bottom plate portion 251, 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 for positioning 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 for sealing. In addition, the inner flange portion 522 and the outer flange portion 523 may be turned over relative to the bottom plate portion 521 to adjust the use state of the corresponding sealing component 50, which may provide more possibilities for the scheme of fluid entering between the two sealing components 50, for example, the fluid may be controlled to impact the flange portion so that the flange portion is turned over, thereby introducing the fluid between the two sealing components 50.

[0062] 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 swell and deform under the action of fluid, has better stability, and is more conducive to ensuring sealing performance.

[0063] The elastic component 51 can abut against the bottom plate portion 521, so as to abut against the valve seat 300 or the valve body assembly 2 through the bottom plate portion 521, so as to define the installation position of the sealing component 50. In addition, a part of the elastic component 51 can be located between the inner flange portion 522 and the outer flange portion 523, and 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.

[0064] The elastic component 51 may be a linear spring, or an elastic body made of a material such as rubber having a certain elastic deformation ability. 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.

[0065] In some embodiments, the sealing mechanism 5 may not include the elastic component 51. In this case, the sealing component 50 may be connected to the valve body assembly 2 and the valve seat 300 through the bottom plate portion 521. The specific connection method may be bonding, spring positioning, etc., to achieve the installation and fixation of the sealing component 50.

[0066] 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.

[0067] like Figure 5 As shown, the second sealing cover 24 may include a first axial limiting portion 243 and a first circumferential limiting portion 244, which may enclose the aforementioned second installation cavity 242, and a surface of the first axial limiting portion 243 facing the second installation cavity 242 is a second step surface 246. The first valve seat 3 may include a second axial limiting portion 32 and a second circumferential limiting portion 33.

[0068] In the assembled state, the first axial limit portion 243 and the second axial limit portion 32 can be arranged relative to each other, the first circumferential limit portion 244 and the second circumferential limit portion 33 can be arranged relative to each other, and 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 can enclose at least part of the accommodation chamber P. The sealing mechanism 5 can be specifically arranged in the accommodation chamber P, and the first circumferential limit portion 244 and the second circumferential limit portion 33 can both guide and limit the elastic component 51 in the sealing mechanism 5. The accommodation chamber P can be connected to the valve chamber 27, or the accommodation chamber P can also be connected to the channel chamber.

[0069] Combination Figure 5 and Figure 7 , the sealing mechanism 5 may include two sealing components 50, and the two sealing components 50 may realize bidirectional sealing. For the convenience of description, 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. The first sealing component 52 and the first circumferential limiting portion 244 and the second circumferential limiting portion 33 are all interference fit, and the bottom plate portion 521 and the outer flange portion 523 of the first sealing component 52 cooperate to realize the sealing between the second axial limiting portion 32 and the first circumferential limiting portion 244. The second sealing component 53 and the first circumferential limiting portion 244 and the second circumferential limiting portion 33 are also interference fit, and the bottom plate portion 521 and the inner flange portion 522 of the second sealing component 53 cooperate to realize the sealing between the first axial limiting portion 243 and the second circumferential limiting portion 33.

[0070] The second cover 24 is also provided with a first communication channel 245, and the first communication channel 245 is used to connect the accommodation chamber P and the first channel chamber M. In this way, when the first channel chamber M serves as a fluid inlet and the first channel chamber M is closed by the main body 11 of the valve core 1, the fluid in the first channel chamber M can flow into the accommodation chamber P through the first communication channel 245 to maintain the pressure balance between the accommodation chamber P and the first channel chamber M. The fluid entering the accommodation chamber P can cooperate with the elastic component 51 to better compress the first sealing component 52, which can improve the sealing effect of the first sealing component 52 between the first circumferential limiting portion 244 and the second axial limiting portion 32, and the fluid in the accommodation 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.

[0071] 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.

[0072] In the embodiment of the accompanying drawings, Figure 5and Fig. 9 As shown in Fig. 9 , the first communication channel 245 can be a sunk groove provided on the second step surface 246. In this way, without external force, the bottom plate portion 521 and the inwardly turned edge portion 522 of the second sealing member 53 can cooperate to block the first communication channel 245. When the second opening 111 is in communication with the first channel cavity M, the first channel cavity M can be in communication with the internal channel 1a, and the fluid will not accumulate in the first channel cavity M. The second sealing member 53 can block the first communication channel 245. When the main body portion 11 blocks the first channel cavity M and the first channel cavity M is a fluid inlet, the fluid pressure in the first channel cavity M is relatively high, and the fluid can impact the second sealing member 53 through the first communication channel 245, causing the inwardly turned edge portion 522 of the second sealing member 53 to fold, thereby guiding the fluid into the accommodation chamber P. The fluid entering the accommodation chamber P can cooperate with the elastic member 51 to press the first sealing member 52 tightly, so as to improve the sealing performance between the second cover 24 and the first valve seat 3. At the same time, the fluid can also cooperate with the elastic member 51 to press the first valve seat 3 tightly to ensure the sealing performance between the first valve seat 3 and the main body portion 11 in the valve-closed state, and can reduce the fluid leakage between the first valve seat 3 and the main body portion 11.

[0073] Please continue to refer to Figure 5 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, and 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 sealing between the first valve seat 3 and the second cover 24 and the sealing between the first valve seat 3 and the main body portion 11.

[0074] 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 is used as a fluid outlet and the first interface cavity 241 is closed by the main body portion 11 of the valve core 1, the fluid in the valve cavity 27 can flow into the accommodation chamber P from 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 press the second sealing member 53 more tightly, and 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.

[0075] 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.

[0076] In the embodiment of the drawings, as Figure 5As shown, the second communication channel 231 can be arranged on the second axial limit portion 32, for example, can be arranged on the outer peripheral wall surface of the second axial limit portion 32, so that the first sealing component 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, the fluid will not gather in the valve cavity 27, and the first sealing component 52 can block the second communication channel 231. When the main body 11 blocks the first channel cavity M, the internal pressure of the valve cavity 27 has nowhere to be released, and will impact the first sealing component 52 through the second connecting channel 231, causing the outer flange portion 523 of the second sealing component 53 to fold, and then introduce the fluid into the accommodating chamber P to maintain the pressure balance between the accommodating chamber P and the valve cavity 27. In this way, it can better avoid the fluid in the valve cavity 27 impacting the first valve seat 3 and causing a gap between the first valve seat 3 and the main body 11, as well as the leakage problem caused thereby; in addition, the fluid entering the accommodating chamber P will also cooperate with the elastic component 51 to press the second sealing component 53 to improve the sealing performance between the second circumferential limiting portion 33 and the first axial limiting portion 243.

[0077] Please continue to refer to Figure 5 The 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 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.

[0078] 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) and a valve body assembly (2), wherein the valve body assembly (2) has a valve cavity (27), at least a portion of the valve core (1) is located in the valve cavity (27), the valve core (1) comprises a main body (11) and an extension portion (12), and along the axial direction of the valve device, the extension portion (12) is located on one side of the main body (11); The valve core (1) has an internal channel (1a) and a balance channel (122); along the axial direction of the valve device, the internal channel (1a) has a first opening (121) at one end of the extension portion (12) relatively away from the main body portion (11), and the internal channel (1a) has a second opening (111) on the outer wall of the main body portion (11); The valve body assembly (2) comprises a support component (23), the support component (23) having a support hole (231), at least a portion of the extension portion (12) being located in the support hole (231), the balance channel (122) being connected to the internal channel (1a), and the balance channel (122) being connected to the valve cavity (27) of the valve body assembly (2).

2. The valve device according to claim 1, characterized in that: The extension portion (12) comprises a first sub-portion (12a) and a second sub-portion (12b), wherein the first sub-portion (12a) is located in the support hole (231), and the second sub-portion (12b) is closer to the main body portion (11) relative to the first sub-portion (12a), and the balancing channel (122) has at least one opening on the outer wall of the second sub-portion (12b).

3. The valve device according to claim 1, characterized in that: The valve body assembly (2) comprises a valve body (21) and a first cover (22); the first cover (22) is mounted on the valve body (21); the inner hole of the first cover (22) comprises a first interface cavity (221) and a first installation cavity (222); the support component (23) is mounted on the first installation cavity (222); the first interface cavity (221) and the first opening (121) are in communication.

4. The valve device according to claim 1, characterized in that: The valve device comprises a valve seat (300), wherein the valve seat (300) is mounted on the valve body assembly (2) and is capable of contacting the main body (11), and the main body (11) is capable of rotating relative to the valve seat (300).

5. The valve device according to claim 4, characterized in that: The valve body assembly (2) comprises a first interface cavity (221) and a second interface cavity (241), the first interface cavity (221) extending along the axial direction of the valve device, the extension direction of the second interface cavity (241) and the extension direction of the first interface cavity (221) forming an included angle, and the first interface cavity (221) and the first opening (121) being in communication; A second opening (111) is formed at one end of the internal channel (1a) away from the first opening (121); the second opening (111) is located in the main body (11); a transition connection cavity is formed on the valve seat (300); the second interface cavity (241) is connected to the transition connection cavity; and the second opening (111) can be connected to or disconnected from the transition connection cavity.

6. The valve device according to claim 4, 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) extends along the axial direction of the valve device; 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 extension direction of the third interface cavity (251) and the extension direction of the first interface cavity (221) are arranged at an angle; the first interface cavity (221) and the first opening (121) are in communication; A second opening (111) is formed at one end of the internal passage (1a) away from the first opening (121), and the second opening (111) is located in the main body (11); the number of the valve seats (300) is two, namely a first valve seat (3) and a second valve seat (4), the first valve seat (3) is formed with a first transition connection cavity (31), the second valve seat (4) is formed with a second transition connection cavity (41), the second interface cavity (241) is connected to the first transition connection cavity (31), and the third interface cavity (251) is connected to the second transition connection cavity (41); the second opening (111) can be connected to or disconnected from the first transition connection cavity (31), and the second opening (111) can be connected to or disconnected from the second transition connection cavity (41).

7. The valve device according to any one of claims 1 to 6, characterized in that: The valve device comprises a valve seat (300), and a sealing mechanism (5) is provided between the valve seat (300) and the valve body assembly (2) for sealing between the valve seat (300) and the valve body assembly (2).

8. The valve device according to claim 7, characterized in that: The sealing mechanism (5) comprises an elastic component (51) and a sealing component (50), wherein the sealing component (50) is arranged on at least one of the two axial sides of the elastic component (51), and the elastic component (51) is also used to press the valve seat (300) against the valve core (1).

9. The valve device according to claim 8, characterized in that: The sealing component (50) comprises a bottom plate portion (521), an inner flange portion (522) and an outer flange portion (523); the inner flange portion (522) and the outer flange portion (523) are both connected to the bottom plate portion (521); the inner flange portion (522) and the outer flange portion (523) are both located on the same side of the bottom plate portion (521); the elastic component (51) and the bottom plate portion (521) are abutted against each other, and a part of the elastic component (51) is located between the inner flange portion (522) and the outer flange portion (523).

10. The valve device according to claim 7, characterized in that: The valve body assembly (2) comprises a first axial limiting portion (243) and a first circumferential limiting portion (244); the valve seat (300) comprises a second axial limiting portion (32) and a second circumferential limiting portion (33); the first axial limiting portion (243) and the second axial limiting portion (32) are arranged relative to each other; the first circumferential limiting portion (244) and the second circumferential limiting portion (33) are arranged relative to each other; the first axial limiting portion (243), the first circumferential limiting portion (244), the second axial limiting portion (32) and the second circumferential limiting portion (33) enclose at least part of a receiving chamber (P); and the sealing mechanism (5) is arranged in the receiving chamber (P); The accommodating chamber (P) can be communicated with the valve chamber (27); The end of the internal channel (1a) away from the first opening (121) forms a second opening (111), the valve body assembly (2) has a channel cavity that can be connected to or disconnected from the second opening (111), and the accommodating chamber (P) can also be connected to the channel cavity.

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