Pressure stabilizing valve

Abstract

The utility model discloses a pressure stabilizing valve, belongs to the technical field of pressure stabilizing valves, solves the problem that an external connecting part easily swings up and down, and adopts the technical scheme that the pressure stabilizing valve comprises a valve main body, a valve core and an operating part, a first valve cavity, a second valve cavity and a communication flow path are formed in the valve main body, the first valve cavity communicates with the second valve cavity through a communicating flow path, the valve element is movably arranged in the valve body and penetrates through the middle of the middle body, and the two ends of the valve element are provided with a first diaphragm formed in the first valve cavity and a second diaphragm formed in the second valve cavity correspondingly. The first diaphragm comprises a sealing part, an outer connecting part, a deformation part and an inner connecting part, a plurality of supporting pieces distributed in the circumferential direction of the central axis of the communicating flow path are arranged between the top wall of the first valve cavity and the outer connecting part, and a channel allowing liquid to pass through is arranged between every two adjacent supporting pieces. The valve is mainly used for limiting swinging of the outer connecting part, and then the connecting stability of the outer connecting part and the valve body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure-stabilizing valves, in particular to a pressure-stabilizing valve. Background Art

[0002] A pressure-stabilizing valve is a valve device used to stabilize the output pressure. When the pressure of the inlet flow channel is constantly changing, the pressure of the outlet flow channel is kept stable at the set pressure. In the prior art, the pressure-stabilizing valve includes a valve body and a valve core movably arranged in the valve body. The valve body is provided with a first valve cavity and a second valve cavity. The first valve cavity is provided with a diaphragm sealed and connected to the valve body. The diaphragm includes a sealing portion that maintains a seal with the valve body, an external connection portion located inside the sealing portion, a deformation portion located inside the external connection portion, and an internal connection portion located inside the deformation portion. The inner peripheral side of the internal connection portion is fixed to the valve core. During the use of the pressure-stabilizing valve, the valve core will frequently move up and down with the pulse of the liquid. During the movement of the valve core, the internal connection portion is driven to move, and the deformation portion is deformed accordingly. During this process, the deformation portion may drive the external connection portion to move up and down. At this time, the external connection portion will swing up and down with the sealing portion as a fulcrum. During long-term use, the frequent swinging of the external connection portion may cause the sealing portion to fail to seal. Utility Model Content

[0003] The utility model aims to solve the problem that the external connection part is prone to swing up and down, and for this purpose provides a pressure-stabilizing valve, in which the support member can limit the swing of the external connection part, thereby improving the connection stability between the external connection part and the valve body.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A pressure stabilizing valve, comprising:

[0006] A valve body, wherein a first valve cavity, a second valve cavity and a communication flow path are formed inside, and the first valve cavity is connected with the second valve cavity through the communication flow path;

[0007] The valve core is disposed inside the valve body and includes a first diaphragm formed inside the first valve cavity and a second diaphragm formed inside the second valve cavity, wherein the first diaphragm includes a sealing portion for maintaining sealing with the valve body;

[0008] An operating part acts on the valve core and applies a force to the valve core toward the first valve cavity;

[0009] A valve seat is formed at an end of the communication flow path close to the first valve cavity, and the valve core changes the opening and closing degree between the valve core and the valve seat in response to the pressure change of the fluid in the second valve cavity;

[0010] An inlet flow channel communicated with the first valve chamber;

[0011] An outlet flow channel communicated with the second valve chamber;

[0012] The first diaphragm includes an outer connecting portion located inside the sealing portion, a deformation portion located inside the outer connecting portion, and an inner connecting portion located inside the deformation portion;

[0013] Among them, a support member is arranged between the top wall of the first valve cavity and the external connecting part, and a plurality of the support members are arranged. The plurality of support members are circumferentially distributed along the central axis of the connecting flow path, and passages for liquid to pass through are arranged between adjacent support members.

[0014] The beneficial effects of adopting the utility model are:

[0015] The support member described in the utility model is located between the top wall of the first valve cavity and the external connection part. The support member can form a limit to the external connection part, so that the external connection part and the bottom wall of the first valve cavity are kept against each other or the distance that the external connection part can move upward is reduced, thereby limiting the external connection part from swinging up and down with the movement of the valve core or reducing the amplitude of the swing of the external connection part, thereby effectively avoiding the sealing failure of the sealing part due to the swing of the connection part, which is beneficial to improving the service life of the sealing part; in addition, when the support member keeps the external connection part stationary as a whole, it can effectively avoid that most of the external connection part is separated from the bottom wall of the first valve cavity, thereby causing the first diaphragm to affect the effective pressure area, which is beneficial to improving the stability of the overall performance of the pressure-stabilizing valve; secondly, the support members are circumferentially distributed along the central axis of the connecting flow path, which can make the force on the external connection part more uniform, help reduce the structural damage or deformation of the external connection part caused by excessive local force, and improve the stability and reliability of the overall structure of the external connection part; the passage between two adjacent support members can keep the flow of the liquid smooth and will not be excessively hindered by the presence of the support member, which is beneficial to improve the flow stability of the fluid in the first valve cavity.

[0016] Preferably, in horizontal projection, the two supports closest to the inlet flow channel are located on both radial sides of the inlet flow channel. By adopting the above technical solution, the supports are staggered from the inlet flow channel, which can effectively avoid the influence of the supports on the flow of the fluid, so that the fluid can flow into the first valve cavity more smoothly, reduce the energy loss of the fluid, and help improve the efficiency of the fluid flow. At the same time, it can also reduce the disturbance and turbulence of the fluid in the first valve cavity.

[0017] Preferably, the support is partially located at the connection between the external connection part and the deformation part in the horizontal plane projection. By adopting the above-mentioned technical solution, the support limits the innermost side of the external connection part, and because the position where the external connection part and the support are against each other is farthest from the sealing part, when the gap between the support and the bottom wall of the first valve cavity is kept fixed, the swing amplitude of the external connection part in the sealing part can be further reduced, which can effectively avoid the sealing failure of the sealing part due to the swing of the connection part, which is beneficial to improve the service life of the sealing part; or the entire external connection part can be kept in close contact with the bottom wall of the first valve cavity, so as to avoid the change of the suspended area of ​​the bottom end of the first diaphragm during the up and down movement of the valve core, resulting in a large change in the force applied by the first valve cavity to the valve core through the first diaphragm, resulting in a large influence of the valve core movement on the liquid pressure inside the first valve cavity, resulting in the valve body being difficult to maintain a relatively stable pressure inside the second valve cavity, resulting in the performance of the valve body being seriously affected.

[0018] Preferably, the deformation portion is bent in a direction away from the second diaphragm. The aforementioned technical solution is adopted so that the deformation portion has more deformation space in the direction toward the second diaphragm, thereby avoiding the situation where the deformation portion and the support member interfere with each other when the support member is partially located at the connection between the external connection portion and the deformation portion in the horizontal plane projection. Thereby, it can be effectively ensured that the deformation amount of the deformation portion remains accurate, which is beneficial to improving the stability of the overall performance of the pressure-stabilizing valve, and avoiding the mutual abutment between the deformation portion and the support member to cause damage to the deformation portion. The bending state refers to the natural state, in which the deformation portion is bent in the direction away from the second diaphragm, or, when the valve core is at the bottom, it is in a downward bending state.

[0019] Preferably, the top wall of the first valve cavity is provided with a groove for inserting the support member. With the above technical solution, the support member is fixed in the first valve cavity by plugging, which can make the installation of the support member simpler and faster, and is conducive to improving the installation efficiency of the support member; in addition, the groove can provide clear positioning and guidance for the installation of the support member, further reducing the difficulty of installing the support member; secondly, the groove can provide sufficient installation space for the support member without increasing the overall structural size, which helps to optimize the utilization of space and maintain the compactness of the overall structure.

[0020] Preferably, the top wall of the first valve cavity is provided with a flat surface, the groove is provided at the flat surface, and the support member can abut against the flat surface. With the above technical solution, the flat surface can effectively prevent the top wall from interfering with the installation of the support member, ensure the stability of the support member on the top wall, reduce the possibility of the support member shaking when subjected to external force, and make the connection between the support member and the top wall more firm and reliable; in addition, the flat surface can make the installation of the support member more intuitive and simple, which is conducive to reducing the difficulty of installing the support member.

[0021] Preferably, the top of the external connection part is a planar structure, and the valve body is provided with an extrusion ring distributed in an annular shape, which squeezes the sealing part to achieve a sealed connection between the first diaphragm and the valve body; or, the sealing part is an annular protrusion arranged on the upper surface of the external connection part, and the valve body is provided with a sealing groove matched with the annular protrusion. With the above-mentioned technical solution, the extrusion ring squeezes the sealing part or the annular protrusion is embedded in the sealing groove, which can improve the sealing between the valve body and the sealing part and ensure the stable operation of the pressure-stabilizing valve; in addition, the extrusion ring can increase the contact area and friction between the sealing part and the valve body, thereby improving the connection stability between the sealing part and the valve body. The sealing groove cooperates with the annular protrusion to limit the radial movement of the sealing part, thereby improving the connection stability between the sealing part and the valve body.

[0022] Preferably, the plurality of support members are integrally formed and constitute a convex ring disposed on the top wall of the first valve cavity. With the above technical solution, the convex ring structure can further save the installation time of the support member, which is conducive to improving the assembly efficiency of the pressure regulating valve.

[0023] Preferably, the outer periphery of the deformation part is connected to the external connection part at the top of the external connection part with a smooth transition setting. The above-mentioned technical solution adopts a smooth transition setting to make the flow of the fluid smoother, reduce the resistance of the fluid, reduce the energy loss of the fluid, and help improve the efficiency of the fluid flow. At the same time, it can also reduce the turbulence of the fluid when it flows through the connection, thereby reducing the noise and vibration caused by the impact of the fluid, which helps to improve the working environment of the flow control valve. At the same time, it can also ensure that there is no structural dead angle between the deformation part and the external connection part, avoiding the accumulation of impurities.

[0024] Preferably, the top wall of the first valve cavity is provided with an inclined portion, and the inclined portion is inclined upward from the connection with the side wall of the first valve cavity toward the direction away from the side wall. With the above technical solution, the inclined portion can guide the fluid to smoothly leave the first valve cavity, and at the same time can also reduce the accumulation of sediments on the top wall of the first valve cavity, thereby reducing the risk of performance degradation or failure of the pressure stabilizing valve.

[0025] Other features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The utility model is further described below in conjunction with the accompanying drawings:

[0027] Figure 1 A cross-sectional view of the first embodiment of the present invention Figure 1 ;

[0028] Figure 2 for Figure 1 A partial enlarged view of part A;

[0029] Figure 3 This is an exploded view of the first embodiment of the utility model;

[0030] Figure 4 For this utility model Figure 1 Middle BB section view;

[0031] Figure 5 This is a schematic structural diagram of the valve core and the first diaphragm in the first embodiment of the utility model;

[0032] Figure 6 This is a schematic diagram of the structure of the intermediate in Example 1 of the utility model;

[0033] Figure 7 This is a schematic diagram of a top view and cross-section structure of the first valve chamber in the first embodiment of the utility model;

[0034] Figure 8 This is a partial enlarged view of the valve body and the sealing part in the second embodiment of the utility model;

[0035] Fig. 9 This is a schematic diagram of the support structure in Embodiment 3 of the present utility model.

[0036] Figure numerals: 1 valve body, 11 upper valve body, 12 lower valve body, 13 intermediate body, 131 inlet flow channel, 132 connecting flow path, 133 outlet flow channel, 134 sealing groove, 135 plane part, 136 inclined part, 137 extrusion ring, 14 first valve cavity, 15 second valve cavity, 16 support member, 2 valve core, 3 first diaphragm, 31 external connecting part, 32 deformation part, 33 internal connecting part, 34 sealing part, 4 second diaphragm, 5 operating part. DETAILED DESCRIPTION

[0037] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first" and "second" 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" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0040] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] like Figures 1 to 6 As shown, this embodiment shows a pressure-stabilizing valve, including a valve body 1, a valve core 2 and an operating part 5. The interior of the valve body 1 is formed with a first valve chamber 14, a second valve chamber 15 and a connecting flow path 132. The first valve chamber 14 is connected to the second valve chamber 15 through the connecting flow path 132. An inlet flow channel 131 and an outlet flow channel 133 are respectively provided on both sides of the valve body 1. The inlet flow channel 131 is connected to the first valve chamber 14, and the outlet flow channel 133 is connected to the second valve chamber 15.

[0042] The valve body 1 is assembled and spliced ​​from top to bottom by an upper valve body 11, an intermediate body 13 and a lower valve body 12, wherein a valve seat is formed at the end of a through-flow path 132 close to a first valve cavity 14, a valve core 2 is movably arranged inside the valve body 1 and passes through the middle of the intermediate body 13, a communication flow path 132 is formed between the valve core 2 and the intermediate body 13, and the valve core 2 can change the size of the opening between the valve core 2 and the valve seat by moving up and down. The two ends of the valve core 2 are respectively arranged as a first diaphragm 3 formed inside the first valve cavity 14 and a second diaphragm 4 formed inside the second valve cavity 15, and an operating part 5 acts on the valve core 2. Figure 1 The top end of the valve core 2 is shown, and a force is applied to the valve core 2 toward the first valve chamber 14.

[0043] The operating component 5 may be an adjustable air pressure structure or an adjustable spring pressure structure. It is understandable that by adjusting the force applied by the operating component 5, the liquid in the second valve cavity 15 can be at different liquid pressures when the valve core 2 is in balance, thereby controlling the pressure of the liquid in the second valve cavity 15.

[0044] like Figure 1As shown, when the valve core 2 moves upward, the opening between the valve core 2 and the valve seat decreases, so that the pressure drop increases when the liquid passes through the valve seat opening; when the valve core 2 moves downward, the opening between the valve core 2 and the valve seat increases, so that the pressure drop decreases when the liquid passes through the valve seat.

[0045] Therefore, in actual use: when the pressure of the liquid in the second valve cavity 15 increases, the second diaphragm 4 is subjected to increased pressure of the liquid. At this time, the second diaphragm 4 is subjected to unbalanced force, and the combined force will push the second diaphragm 4 to move upward, so that the valve core 2 will move upward, and the opening between the valve seat and the valve core 2 will decrease, and the pressure drop will increase, so as to reduce the pressure of the liquid inside the second valve cavity 15; when the pressure of the liquid in the second valve cavity 15 decreases, the second diaphragm 4 is subjected to reduced pressure of the liquid. At this time, the second diaphragm 4 is subjected to unbalanced force, and the force applied by the operating part 5 to the second diaphragm 4 will push the second diaphragm 4 downward, so that the valve core 2 will move downward, and the opening between the valve seat and the valve core 2 will increase, and the pressure drop will decrease, so as to increase the pressure of the liquid inside the second valve cavity 15. That is, when the pressure inside the second valve cavity 15 fluctuates, the valve body can achieve that the pressure inside the second valve cavity 15 is kept within a certain range through the up and down movement of the valve core 2, and the pressure can be adjusted by the operating part 5.

[0046] like Figure 1 As shown, in this embodiment, the first diaphragm 3 includes a sealing portion 34 , an external connecting portion 31 , a deformation portion 32 and an internal connecting portion 33 , wherein the first diaphragm 3 also includes a sealing portion 34 , which is located on the outer peripheral side of the external connecting portion 31 .

[0047] And the external connection part 31 and the deformation part 32 can be as follows Figure 1 As shown, the thickness of the outer connection part 31 is significantly greater than the thickness of the deformation part 32. Similarly, the outer connection part 31 can also be set to be the same or similar to the thickness of the deformation part 32. In this case, the outer edge of the outer connection part 31 is pressed tightly in the lower valve body 12, and the part with a significant change in slope through the axial movement of the first diaphragm 3 is the deformation part 32, and the part with no change or a slight change in slope is the outer connection part 31.

[0048] The sealing portion 34 is clamped and fixed between the lower valve body 12 and the intermediate body 13 , and maintains a sealed connection with the intermediate body 13 ; the deformation portion 32 is located on the inner circumference side of the outer connection portion 31 , and the inner connection portion 33 is located on the inner circumference side of the deformation portion 32 .

[0049] In addition, a support member 16 is provided between the top wall of the first valve cavity 14 and the external connection portion 31 . There are multiple support members 16 , which are circumferentially distributed along the central axis of the connecting flow path 132 , and passages for fluid to pass through are provided between adjacent support members 16 .

[0050] The support member 16 described in the present embodiment is located between the top wall of the first valve cavity 14 and the external connection part 31. The support member 16 can form a limit for the external connection part 31, so that the external connection part 31 and the bottom wall of the first valve cavity 14 are kept against each other, thereby limiting the external connection part 31 from swinging up and down along with the movement of the valve core 2, and at the same time, it can effectively prevent the sealing part 34 from failing due to the swinging of the connection part, which is beneficial to improving the service life of the sealing part 34; or a certain gap is maintained between the support member 16 and the external connection part 31, and the support member 16 can limit the distance of the upward movement of the external connection part 31, so as to reduce the swing amplitude of the external connection part 31 with the sealing part 34 as the fulcrum, thereby effectively preventing the sealing part 34 from being damaged, deformed or other sealing failures due to the swinging of the external connection part 31.

[0051] In addition, when the support member 16 is always in contact with the external connection part 31 and keeps the external connection part 31 in contact with the first valve chamber 14, the external connection part 31 can be effectively prevented from affecting the effective pressure area of ​​the first diaphragm 3, which is beneficial to improving the stability of the overall performance of the pressure-stabilizing valve; secondly, the support member 16 is circumferentially distributed along the central axis of the connecting flow path 132, so that multiple parts of the external connection part 31 in the circumferential direction can be restricted by the support member 16 and cannot swing or the swing amplitude is reduced, and at the same time, the force can be more uniform, which helps to avoid structural damage or deformation of the external connection part 31 due to excessive local force, and can improve the stability and reliability of the overall structure of the external connection part 31; the passage between two adjacent support members 16 can keep the flow of the fluid smooth, and will not be excessively obstructed by the presence of the support member 16, which helps to improve the flow stability of the fluid in the first valve chamber 14.

[0052] The effective pressure area refers to the equivalent area of ​​the suspended part at the bottom of the first diaphragm 3, which directly affects the force balance of the valve core, and further affects the up and down movement of the valve core. Assuming that the liquid pressure inside the first valve cavity 14 is P, and the effective pressure area of ​​the first diaphragm 3 is S, the liquid inside the first valve cavity 14 acts on the first diaphragm 3 and generates a downward force of F on the valve core 2, where F = P*S.

[0053] In this embodiment, in the direction of horizontal projection, the two support members 16 closest to the inlet flow channel 131 are located on both sides of the radial direction of the inlet flow channel 131. Figure 4As shown in the figure, the dotted line part is the virtual extension section of the side walls on both sides of the inlet flow channel 131, and the direction indicated by the arrow in the figure is the radial sides of the inlet flow channel 131. After the fluid enters the first valve cavity 14 from the inlet flow channel 131, the support member 16 can avoid the flow direction of the fluid, so that the fluid flows directly from the passage into the first valve cavity 14, thereby effectively avoiding the influence of the support member 16 on the flow of the fluid, so that the fluid can flow more smoothly into the first valve cavity 14, reducing the energy loss of the fluid, which is conducive to improving the efficiency of the fluid flow, and also can reduce the disturbance and turbulence of the fluid in the first valve cavity 14.

[0054] Specifically, the liquid flow velocity is the largest at the shortest flow path between the inlet flow channel 131 and the connecting flow path 132, and in the above structure, the two support members 16 closest to the inlet flow channel 131 are located on both sides of the radial direction of the inlet flow channel 131, so that the two support members 16 are located on both sides of the aforementioned shortest flow path, thereby avoiding the support members 16 being directly located near the shortest flow path area. This avoids the liquid with a high flow velocity from directly impacting the support members 16, generating relatively strong turbulence and disturbance, and causing fluid energy loss and valve body vibration.

[0055] In this embodiment, the top wall of the first valve cavity 14 is provided with a groove for inserting the support member 16, and the top of the support member 16 is provided with a connecting column that is plug-matched with the groove. During the installation process, the support member 16 only needs to insert the connecting column into the groove to achieve the connection between the support member 16 and the first valve cavity 14. The support member 16 is fixed in the first valve cavity 14 by plugging, which can make the installation of the support member 16 simpler and faster, and is conducive to improving the installation efficiency of the support member 16; in addition, the groove can provide clear positioning and guidance for the installation of the support member 16, further reducing the difficulty of installing the support member 16; secondly, the groove can provide sufficient installation space for the support member 16 without increasing the overall structural size, which helps to optimize the utilization of space and maintain the compactness of the overall structure. It should be noted that the support member 16 described in the present embodiment is cylindrical as a whole. The cylindrical structure can reduce the resistance of the fluid flowing through the support member 16, reduce the energy loss of the fluid, and is beneficial to improving the efficiency of the fluid flow. It can also reduce the disturbance and turbulence of the fluid in the first valve chamber 14. Of course, it can be understood that in other embodiments, the support member 16 can also be other structures such as other square columns, polygonal columns or elliptical columns. At the same time, the support member 16 and the top wall of the first valve chamber 14 can also be an integrated structure, which can save the installation process of the support member 16 and improve the assembly efficiency of the valve body 1.

[0056] like Figure 6As shown, in this embodiment, the top wall of the first valve cavity 14 is provided with a planar portion 135 and an inclined portion 136, the outer peripheral side of the inclined portion 136 is connected to the side wall of the first valve cavity 14, and the inner peripheral side of the inclined portion 136 is connected to the planar portion 135, and the inclined portion 136 is inclined upward from the connection with the side wall of the first valve cavity 14 toward the direction away from the side wall, that is, the planar portion 135 is at the highest position of the inclined portion 136, the groove is arranged at the planar portion 135, and the support member 16 can be against the planar portion 135.

[0057] In this embodiment, the planar portion 135 can effectively prevent the top wall from interfering with the installation of the support member 16, thereby ensuring the stability of the support member 16 on the top wall, reducing the possibility of the support member 16 shaking when subjected to external force, and making the connection between the support member 16 and the top wall more firm and reliable; at the same time, it can also ensure that there is a gap between the support member 16 and the top wall, creating a structural dead angle and causing impurity accumulation; secondly, the planar portion 135 can make the installation of the support member 16 more intuitive and simple, which is conducive to reducing the difficulty of installing the support member 16.

[0058] Likewise, the inclined portion 136 can guide the fluid to smoothly leave the first valve chamber 14 , and can also reduce the accumulation of sediment on the top wall of the first valve chamber 14 , thereby reducing the risk of performance degradation or failure of the pressure-stabilizing valve.

[0059] like Figure 4 As shown, the projection of the support member 16 on the horizontal plane in this embodiment is located at the connection between the outer connecting portion 31 and the deformable portion 32, and the support member 16 forms a limit to the innermost side of the outer connecting portion 31, and the position where the outer connecting portion 31 and the support member 16 abut against each other is farthest from the sealing portion 34. In the above structure, the position of the support member 16 can be: the support member 16 partially exceeds the inner edge of the outer connecting portion 31, such as Figure 7 C; or, the edge of the support member 16 and the inner edge of the outer connecting portion 31 are exactly in a coincident arrangement, such as Figure 7 As shown in D.

[0060] When the valve core 2 moves to Figure 1 The lowest point is shown, when there is a certain distance between the support member 16 and the outer connecting portion 31. If the distance is constant, the closer the support member 16 is to the inner side of the outer connecting portion 31, the smaller the swing amplitude of the outer fixing portion 31 near the sealing portion 34, thereby ensuring that the sealing structure is not easily damaged.

[0061] When the support member 16 is directly attached to the external connection part 31 and pressurized to keep it on the bottom wall of the first valve cavity 14, when the valve core 2 moves up and down, the external connection part 31 will always be attached to the bottom wall of the first valve cavity 14, thereby effectively avoiding the external connection part 31 from affecting the effective pressure area, which is beneficial to improving the stability of the overall performance of the pressure-stabilizing valve.

[0062] Under normal circumstances, the external connection part 31 fits with the bottom wall of the first valve cavity 14, and the downward pressure exerted by the liquid in the first valve cavity 14 on the external connection part 31 is equal to the support force exerted by the first valve cavity 14 on the external connection part 31. When the external connection part 31 is partially separated from the first valve cavity 14, the pressure exerted by the liquid on the external connection part 31 is not equal to the force exerted by the first valve cavity 14 on the external connection part 31, so the force exerted by the liquid on the external connection part 31 will partially participate in the balancing process of the second diaphragm 4, so at this time, the force exerted by the second diaphragm 4 is increased by the influence of the liquid in the first valve cavity 14, and at the same time, during the movement of the valve core 2, the area where the external connection part 31 is separated from the contact with the bottom wall of the first valve cavity 14 is still changing, which will further lead to unbalanced force on the second diaphragm 4, resulting in the inability of the valve body to stabilize the pressure of the liquid in the second valve cavity within the required range. Therefore, the above-mentioned support member 16 directly limits the external connection part 31, which can avoid the above situation to ensure the performance of the valve body.

[0063] like Figure 1 As shown, the deformation portion 32 in the present embodiment is bent in the direction away from the second diaphragm 4, so that the deformation portion 32 has more deformation space in the direction toward the second diaphragm 4. At the same time, when the above-mentioned support member 16 is arranged on the inner side of the external connection portion 31, the possibility of interference between the deformation portion 32 and the support member 16 during deformation can be reduced, and it can be ensured that the deformation portion 32 will not be locally worn or deformed due to the influence of the support member 16, and the deformation amount of the deformation portion 32 can be effectively ensured to remain accurate, which is beneficial to improving the stability of the overall performance of the pressure-stabilizing valve.

[0064] like Figure 2 As shown, in this embodiment, the top surface of the external connection part 31 is a planar structure, the sealing part 34 is an annular protrusion arranged on the upper surface of the external connection part 31, and the sealing part 34 is at the outer edge of the external connection part 31, and the valve body 1 is provided with a sealing groove 134 matched with the annular protrusion. After the valve cover and the lower valve body 12 are assembled, the external connection part 31 and the sealing part 34 are between the valve cover and the lower valve body 12, and the sealing part 34 is embedded in the sealing groove 134, which can improve the sealing between the valve body 1 and the sealing part 34 and ensure that the pressure-stabilizing valve can operate stably. The sealing groove 134 cooperates with the annular protrusion to limit the radial movement of the sealing part 34, thereby improving the connection stability between the sealing part 34 and the valve body 1.

[0065] like Figure 5As shown, in this embodiment, the outer periphery of the deformation part 32 and the connection between the outer connection part 31 and the top of the outer connection part 31 are connected with a smooth transition setting. The use of a smooth transition setting can make the flow of the fluid smoother, reduce the resistance of the fluid, reduce the energy loss of the fluid, and help improve the efficiency of the fluid flow. At the same time, it can also reduce the turbulence of the fluid when it flows through the connection, thereby reducing the noise and vibration caused by the impact of the fluid, which helps to improve the working environment of the flow control valve. At the same time, the above-mentioned smooth transition setting can also avoid the formation of a structural dead angle at the connection between the deformation part 32 and the outer connection part 31, and avoid the accumulation of impurities and the like.

[0066] Embodiment 2

[0067] The difference from the first embodiment is that:

[0068] like Figure 8 As shown, the sealing portion 34 may also be kept flush with the external connection portion 31. The valve cover is provided with an extrusion ring 137 distributed in a ring shape. After the valve cover is assembled and connected to the lower valve body 12, the extrusion ring 137 squeezes the sealing portion 34 to achieve a sealed connection between the first diaphragm 3 and the valve body 1. The extrusion ring 137 can concentrate the pressure between the sealing portion 34 and the extrusion ring 137 to ensure good sealing performance at the sealing portion 34.

[0069] Embodiment 3

[0070] like Fig. 9 As shown, the difference from the first or second embodiment is that a plurality of support members 16 are integrally formed and constitute a convex ring disposed on the top wall of the first valve cavity 14. This structure can achieve more convenient installation and save installation time.

[0071] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A pressure stabilizing valve, comprising: A valve body, wherein a first valve cavity, a second valve cavity and a communication flow path are formed inside, and the first valve cavity is connected with the second valve cavity through the communication flow path; The valve core is disposed inside the valve body and includes a first diaphragm formed inside the first valve cavity and a second diaphragm formed inside the second valve cavity, wherein the first diaphragm includes a sealing portion for maintaining sealing with the valve body; An operating part acts on the valve core and applies a force to the valve core toward the first valve cavity; A valve seat is formed at an end of the communication flow path close to the first valve cavity, and the valve core changes the opening and closing degree between the valve core and the valve seat in response to the pressure change of the fluid in the second valve cavity; an inlet flow channel, communicating with the first valve chamber; An outlet flow channel communicated with the second valve chamber; It is characterized in that The first diaphragm includes an outer connecting portion located inside the sealing portion, a deformation portion located inside the outer connecting portion, and an inner connecting portion located inside the deformation portion; Among them, a support member is arranged between the top wall of the first valve cavity and the external connecting part, and a plurality of the support members are arranged. The plurality of support members are circumferentially distributed along the central axis of the connecting flow path, and passages for liquid to pass through are arranged between adjacent support members.

2. The pressure-stabilizing valve according to claim 1, characterized in that: In horizontal projection, the two support members closest to the inlet flow channel are located on both sides of the radial direction of the inlet flow channel.

3. The pressure-stabilizing valve according to claim 1, characterized in that: The support member is partially located at the connection between the outer connection part and the deformation part in horizontal plane projection.

4. The pressure-stabilizing valve according to claim 3, characterized in that: The deformation portion is bent in a direction away from the second diaphragm.

5. The pressure-stabilizing valve according to claim 1, characterized in that: The top wall of the first valve cavity is provided with a groove for the support member to be inserted.

6. The pressure-stabilizing valve according to claim 5, characterized in that: The top wall of the first valve cavity is provided with a plane portion, the groove is provided at the plane portion, and the support member can abut against the plane portion.

7. The pressure-stabilizing valve according to claim 1, characterized in that: The top end of the external connection part is a planar structure, and the valve body is provided with an extrusion ring distributed in a ring shape, which squeezes the sealing part to achieve a sealed connection between the first diaphragm and the valve body; or, the sealing part is an annular protrusion arranged on the upper surface of the external connection part, and the valve body is provided with a sealing groove matching the annular protrusion.

8. The pressure-stabilizing valve according to claim 1, characterized in that: The plurality of support members are integrally formed and constitute a convex ring disposed on the top wall of the first valve cavity.

9. The pressure-stabilizing valve according to claim 1, characterized in that: The outer periphery of the deformation part is connected to the outer connecting part and is arranged with a smooth transition between the top ends of the outer connecting part.

10. The pressure-stabilizing valve according to claim 1, characterized in that: The top wall of the first valve cavity is provided with an inclined portion, and the inclined portion is inclined upward from a connection with the side wall of the first valve cavity toward a direction away from the side wall.

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