Low-operating-force two-way transposition liquid separation valve element
By using a layered guide block and grid bar staggered structure design, the problem of the sealing ring bearing high pressure under high pressure in traditional bidirectional reversing valves is solved, achieving low operating force and high sealing performance, improving user experience and the reliability of fluid flow switching.
Patent Information
- Application Number
- CN202520400065.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-07
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-03-07
AI Technical Summary
Traditional bidirectional valves suffer from excessively high instantaneous pressure peaks on the sealing ring under high pressure or high frequency conditions, making operation difficult, prone to leakage, and resulting in incomplete switching of fluid flow paths and a lack of effective pressure buffering design.
The design employs a layered flow guide block and grid bar staggered structure, which forms a clear interlayer flow path for the liquid flow inside the valve core. The staggered grid bar layout disperses the liquid flow energy, forming a pressure buffer layer and reducing the instantaneous pressure peak of the sealing ring.
It significantly reduces the service life of the sealing ring, improves the user experience, avoids leakage and turbulence, and ensures a complete switch of the fluid flow path.
Smart Images
Figure CN223648185U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of liquid distribution valve technology, specifically to a low-operating-force bidirectional displacement liquid distribution valve core. Background Technology
[0002] In the field of fluid control, the bidirectional directional valve core is the core component for switching fluid flow paths and is widely used in sanitary ware, industrial hydraulic systems, and medical devices. Traditional bidirectional directional valves typically use a single sealing ring and push rod structure to achieve fluid path switching, but this presents the following technical problems under high pressure or high frequency conditions.
[0003] First, when the fluid flow directly impacts the sealing interface, the instantaneous pressure peak experienced by the sealing ring is excessively high, causing the switching push rod to overcome a tremendous fluid flow reaction force, resulting in laborious operation and a poor user experience. Second, traditional sealing ring clamping methods are prone to sealing ring displacement or deformation due to fluid flow impact or push rod misalignment, leading to leakage problems, especially under high pressure, significantly shortening the seal life. Furthermore, a single flow guiding structure is prone to turbulence or pressure fluctuations, resulting in incomplete or delayed fluid flow path switching, and the lack of an effective pressure buffer design further exacerbates sealing ring wear. Utility Model Content
[0004] The purpose of this invention is to address the problems existing in the prior art by providing a low-operating-force bidirectional switching liquid separator valve core that disperses the liquid flow energy into multidirectional microflows. By utilizing the interference of the fluid path, the liquid flow energy is fully dissipated before reaching the sealing ring, reducing the switching operation force and greatly improving the user experience.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A low-operating-force bidirectional displacement valve core includes a housing, a button assembly, a push rod, and a first sealing ring. The housing has a first outlet and a second outlet on its side wall, and an inlet on its bottom end face. The housing's inner cavity has a first flow guide block, which is sealed to the inner wall of the housing. The lower end face of the first flow guide block has a first flow guide port, and the interior of the first flow guide block has a first flow guide channel connected to the first flow guide port. The other end of the first flow guide channel is connected to the first outlet. Below the first flow guide block, the inner cavity of the housing has a second flow guide block, with a spacer channel between the periphery of the second flow guide block and the inner wall of the housing. The upper end face of the second flow guide block has a second flow guide port. The block has a second flow channel inside that connects to the second flow port, and the other end of the second flow channel connects to the second liquid outlet. The push rod moves axially through the first flow block and extends out from the first flow port. The upper end of the push rod is connected to a button assembly, and the lower end of the push rod is fitted with a first sealing ring. When the push rod moves upward to switch, the first sealing ring seals and blocks the first flow port. When the push rod moves downward to switch, the first sealing ring seals and blocks the second flow port. A plurality of first grid bars are distributed around the first flow port, and a plurality of second grid bars are distributed around the second flow port. The first grid bars and the second grid bars are staggered vertically, and there is a gap between the first grid bars and the second grid bars.
[0007] Furthermore, a plurality of first grid bars are circumferentially spaced around the first flow guide; a plurality of second grid bars are circumferentially spaced around the second flow guide; the plurality of first grid bars are located outside the plurality of second grid bars, and the first grid bars and the second grid bars are staggered in the circumferential direction.
[0008] Furthermore, a limiting rod is connected to the lower end of the push rod, and the limiting rod extends into the second flow guide port. When the push rod moves downward to switch, the limiting rod abuts against the bottom of the second flow guide channel.
[0009] Furthermore, the lower end of the push rod is provided with an annular boss, and the periphery of the boss is provided with an annular limiting groove, and the first sealing ring is engaged in the limiting groove.
[0010] Furthermore, a sealing plate is provided on the upper side of the first guide block, and the periphery of the sealing plate is in sealed contact with the inner wall of the housing, and the push rod movably seals through the sealing plate.
[0011] Furthermore, the upper end of the push rod is connected to a tube post via a thread, and the push rod is connected to the button assembly through the tube post.
[0012] Furthermore, the button assembly includes a button cap and a bushing connected to the button cap; the tube column is inserted into the bushing, and a wing plate is provided on the periphery of the tube column. A return spring is provided between the wing plate and the first guide block; when the button cap is pressed for the first time, the hook on the side wall of the bushing engages with the locking block on the inner wall of the housing under the guidance of the button cap, and the push rod is pressed down and remains locked; when pressed again, the inclined block of the button cap drives the bushing to rotate by a predetermined angle, the hook disengages from the locking block, and the return spring pushes the wing plate to make the push rod spring back to the initial position.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] Through the layered flow guiding design of the first and second flow guiding blocks, combined with the directional flow guidance of the interval flow channel, the liquid flow forms a clear interlayer flow path inside the valve core, avoiding turbulence interference; at the same time, the grid bar staggered structure forms a pressure buffer layer at the flow guide port, so that the liquid pressure has been attenuated in multiple stages before reaching the sealing ring, significantly reducing the instantaneous pressure peak borne by the sealing interface and extending the service life of the sealing ring.
[0015] By using the staggered arrangement of the first and second grid bars, the fluid kinetic energy is dispersed into multidirectional microflows. By utilizing the interference of the fluid path, the fluid energy is fully dissipated before reaching the sealing ring, reducing the switching operation force and greatly improving the user experience. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of the valve core according to an embodiment of this application;
[0018] Figure 2 This is a cross-sectional view of a valve core according to an embodiment of this application;
[0019] Figure 3 This is a schematic diagram of the internal structure of the lower part of the shell according to an embodiment of this application;
[0020] In the diagram: 1. Housing; 2. Push rod; 3. First sealing ring; 4. First liquid outlet; 5. Second liquid outlet; 6. Liquid inlet; 7. First guide block; 8. First guide port; 9. First guide channel; 10. Second guide block; 11. Spacer channel; 12. Second guide port; 13. Second guide channel; 14. First grid bar; 15. Second grid bar; 16. Limiting rod; 17. Separator plate; 18. Tube column; 19. Bushing; 20. Wing plate; 21. Return spring; 22. Press cap. Detailed Implementation
[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.
[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] In the field of fluid control, the bidirectional directional valve core is the core component for switching fluid flow paths and is widely used in sanitary ware, industrial hydraulic systems, and medical devices. Traditional bidirectional directional valves typically use a single sealing ring and push rod structure to achieve fluid path switching, but this presents the following technical problems under high pressure or high frequency conditions.
[0026] First, when the fluid flow directly impacts the sealing interface, the instantaneous pressure peak experienced by the sealing ring is excessively high, causing the switching push rod to overcome a tremendous fluid flow reaction force, resulting in laborious operation and a poor user experience. Second, traditional sealing ring clamping methods are prone to sealing ring displacement or deformation due to fluid flow impact or push rod misalignment, leading to leakage problems, especially under high pressure, significantly shortening the seal life. Furthermore, a single flow guiding structure is prone to turbulence or pressure fluctuations, resulting in incomplete or delayed fluid flow path switching, and the lack of an effective pressure buffer design further exacerbates sealing ring wear.
[0027] Regarding the above technical issues, such as Figures 1 to 3 As shown, this application embodiment provides a low-operating-force bidirectional displacement valve core, including a housing 1, a button assembly, a push rod 2, and a first sealing ring 3; the side wall of the housing 1 is provided with a first outlet 4 and a second outlet 5, and the bottom end face of the housing 1 is provided with an inlet 6; the inner cavity of the housing 1 is provided with a first guide block 7, which is sealed to the inner wall of the housing 1, and the lower end face of the first guide block 7 is provided with a first guide port 8; the interior of the first guide block 7 is provided with a first guide channel 9 connected to the first guide port 8, and the other end of the first guide channel 9 is connected to the first outlet 4; the inner cavity of the housing 1 is provided with a second guide block 10 located below the first guide block 7, and the periphery of the second guide block 10 has a spacer channel 11 between it and the inner wall of the housing 1; the upper end face of the second guide block 10 is provided with a second guide port 1. 2. The interior of the second guide block 10 is provided with a second guide channel 13 connected to the second guide port 12, and the other end of the second guide channel 13 is connected to the second liquid outlet 5; the push rod 2 moves axially through the first guide block 7 and extends out from the first guide port 8; the upper end of the push rod 2 is connected to the button assembly, and the lower end of the push rod 2 is fitted with a first sealing ring 3; when the push rod 2 moves upward to switch, the first sealing ring 3 seals and blocks the first guide port 8, and when the push rod 2 moves downward to switch, the first sealing ring 3 seals and blocks the second guide port 12; a number of first grid bars 14 are distributed around the first guide port 8, and a number of second grid bars 15 are distributed around the second guide port 12, the first grid bars 14 and the second grid bars 15 are staggered vertically, and there is a gap between the first grid bars 14 and the second grid bars 15.
[0028] The valve core's push rod 2 and the first sealing ring 3 are axially linked for control. When the button assembly is pressed, the push rod 2 moves axially. When the push rod moves upward, the first sealing ring 3 moves upward and seals the first guide port 8. At this time, the liquid flows into the inner cavity of the housing 1 from the inlet 6, flows sequentially through the spacer channel 11 between the second guide block 10 and the inner wall of the housing 1, and the cavity between the first guide block 7 and the second guide block 10, and finally enters the second guide channel 13 through the second guide port 12, and is output from the second outlet 5, completing the second liquid path connection. When the push rod moves downward, the first sealing ring 3 moves downward and seals the second guide port 12. After passing through the spacer channel 11, the liquid flows directly into the first guide channel 9 through the first guide port 8 and is output from the first outlet 4, realizing the first liquid path connection.
[0029] The first guide port 8 and the second guide port 12 are respectively surrounded by circumferentially distributed first grid bars 14 and second grid bars 15, which are arranged alternately to form a composite turbulence structure. When the liquid flows through the area where the grid bars are intersecting, its flow path is forcibly changed. The liquid must bypass the gaps between the intersecting grid bars, the flow path is lengthened, and the flow velocity is reduced.
[0030] Through the layered flow guiding design of the first guide block 7 and the second guide block 10, combined with the directional flow guidance of the spacer channel 11, the liquid flow forms a clear interlayer flow path inside the valve core, avoiding turbulence interference. At the same time, the staggered grid structure forms a pressure buffer layer at the flow guide port, so that the liquid pressure is attenuated in multiple stages before reaching the sealing ring 3, significantly reducing the instantaneous pressure peak borne by the sealing interface and extending the service life of the sealing ring.
[0031] Traditional valve cores require overcoming the direct impact of fluid flow on the seal during high-pressure switching, resulting in laborious operation. By using the staggered arrangement of the first grid bar 14 and the second grid bar 15, the fluid kinetic energy is dispersed into multidirectional microflows. Utilizing the interference of the fluid path, the fluid energy is fully dissipated before reaching the sealing ring 3, reducing the switching operation force and greatly improving the user experience.
[0032] In some embodiments, a plurality of first grid bars 14 are circumferentially spaced around the first flow guide 8; a plurality of second grid bars 15 are circumferentially spaced around the second flow guide 12; the first grid bars 14 are located outside the second grid bars 15, and the first grid bars 14 and the second grid bars 15 are staggered in the circumferential direction.
[0033] The staggered design of the first and second grid bars 14 and 15 causes their gaps to partially overlap and partially offset in the axial projection, forming an asymmetric flow channel. The liquid flow needs to repeatedly contract and expand within the staggered gaps, generating a local throttling effect and suppressing the flow velocity in multiple stages. The staggered gaps break the continuity of the liquid flow, forcing the liquid flow to frequently collide and recombine between the inner and outer grid layers, forming a self-diminishing micro-turbulence and avoiding concentrated impact on the sealing interface.
[0034] In some embodiments, the lower end of the push rod 2 is connected to a limiting rod 16, which extends into the second guide port 12. When the push rod 2 moves downward, the limiting rod 16 abuts against the bottom of the second guide channel 13.
[0035] The limiting rod 16 abuts against the bottom of the second guide channel 13, forming a rigid limit to ensure that the maximum downward stroke of the push rod 2 is strictly limited, avoiding excessive compression of the sealing ring 3 or damage to the guide port structure due to excessive displacement. At the same time, it also reduces the driving force when the push rod 2 moves upward again.
[0036] In some embodiments, the lower end of the push rod 2 is provided with an annular boss, and the periphery of the boss is provided with an annular limiting groove, and the first sealing ring 3 is engaged in the limiting groove.
[0037] The limiting groove precisely positions and fixes the first sealing ring 3, ensuring that it can maintain a stable sealing interface contact pressure under high pressure conditions, achieving zero-leakage sealing. By designing the outer contour of the annular boss to smoothly transition with the rod body of the push rod 2, turbulence or eddies in the liquid flow at the lower end of the push rod 2 are avoided, reducing energy loss.
[0038] In some embodiments, a baffle plate 17 is provided on the upper side of the first guide block 7. The periphery of the baffle plate 17 is in sealing contact with the inner wall of the housing 1, and the push rod 2 movably and sealingly passes through the baffle plate 17. The baffle plate 17 has three functions: fluid flow separation, pressure stabilization, and push rod guidance, making the valve core structure more compact.
[0039] In some embodiments, the upper end of the push rod 2 is connected to a tube post 18 via a thread, and the push rod 2 is connected to the button assembly via the tube post 18.
[0040] The push rod 2 is connected to the tubing 18 via a thread, enabling quick assembly and disassembly, facilitating valve core maintenance and replacement. By rotating the tubing 18, the initial position of the push rod 2 can be finely adjusted to ensure that the contact pressure between the sealing ring 3 and the guide port is within the optimal range, thereby improving sealing performance.
[0041] In some embodiments, the button assembly includes a button cap 22 and a bushing 19 connected to the button cap 22; a column 18 is inserted into the bushing 19, and a wing plate 20 is provided on the periphery of the column 18. A return spring 21 is provided between the wing plate 20 and the first guide block 7; when the button cap 22 is pressed for the first time, the hook on the side wall of the bushing 19 engages with the locking block on the inner wall of the housing 1 under the guidance of the button cap 22, and the push rod 2 is pressed down and remains locked; when pressed again, the inclined block of the button cap 22 drives the bushing 19 to rotate by a predetermined angle, the hook disengages from the locking block, and the return spring 21 pushes the wing plate 20 to make the push rod 2 spring back to the initial position.
[0042] When the push cap 22 is pressed for the first time, the guide structure of the push cap 22 drives the hook on the side wall of the bushing 19 to engage with the locking block on the inner wall of the housing 1, locking the push rod 2 in the pressed position. At this time, the first sealing ring 3 blocks the second guide port 12, and the liquid flow is output through the first guide port 8, realizing the opening of the first liquid path. During the pressing of the push rod 2, the wing plate 20 compresses the return spring 21, storing elastic potential energy to provide power for subsequent reset.
[0043] When the cap 22 is pressed again, the inclined block of the cap 22 drives the bushing 19 to rotate by a predetermined angle, causing the hook to disengage from the locking block and releasing the locking state of the push rod 2. After the hook disengages from the locking block, the return spring 21 releases its elastic potential energy, pushing the wing plate 20 to cause the push rod 2 to spring back to its initial position. At this time, the first sealing ring 3 blocks the first guide port 8, and the liquid flow is output through the second guide port 12, realizing the opening of the second liquid path.
[0044] With its design of locking upon first press and resetting upon second press, users can easily switch the fluid flow path by simply pressing the cap 22, making operation convenient.
[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A low-operating-force bidirectional switching liquid separator valve core, characterized in that, Includes housing (1), button assembly, push rod (2), and first sealing ring (3); The side wall of the housing (1) is provided with a first liquid outlet (4) and a second liquid outlet (5), and the bottom end face of the housing (1) is provided with a liquid inlet (6); The inner cavity of the shell (1) is provided with a first guide block (7), the first guide block (7) is sealed to the inner wall of the shell (1), the lower end face of the first guide block (7) is provided with a first guide port (8), the interior of the first guide block (7) is provided with a first guide channel (9) connected to the first guide port (8), and the other end of the first guide channel (9) is connected to the first liquid outlet (4); The inner cavity of the shell (1) has a second guide block (10) located below the first guide block (7). The periphery of the second guide block (10) and the inner wall of the shell (1) have a spacer channel (11). The upper end face of the second guide block (10) has a second guide port (12). The interior of the second guide block (10) has a second guide channel (13) connected to the second guide port (12). The other end of the second guide channel (13) is connected to the second liquid outlet (5). The push rod (2) moves axially through the first guide block (7) and extends out from the first guide port (8); the upper end of the push rod (2) is connected to the button assembly, and the lower end of the push rod (2) is fitted with a first sealing ring (3); when the push rod (2) moves upward to switch, the first sealing ring (3) seals and blocks the first guide port (8); when the push rod (2) moves downward to switch, the first sealing ring (3) seals and blocks the second guide port (12); A plurality of first grid bars (14) are distributed around the first flow guide (8), and a plurality of second grid bars (15) are distributed around the second flow guide (12). The first grid bars (14) and the second grid bars (15) are arranged alternately, and there is a gap between the first grid bars (14) and the second grid bars (15).
2. The low-operating-force bidirectional switching liquid separator valve core according to claim 1, characterized in that, A plurality of first grid bars (14) are circumferentially spaced around the first flow guide (8); a plurality of second grid bars (15) are circumferentially spaced around the second flow guide (12); the first grid bars (14) are located outside the second grid bars (15), and the first grid bars (14) and the second grid bars (15) are staggered in the circumferential direction.
3. The low-operating-force bidirectional switching liquid separator valve core according to claim 1, characterized in that, The lower end of the push rod (2) is connected to a limiting rod (16), which extends into the second guide port (12). When the push rod (2) moves downward, the limiting rod (16) abuts against the bottom of the second guide channel (13).
4. The low-operating-force bidirectional switching liquid separator valve core according to claim 1, characterized in that, The lower end of the push rod (2) is provided with an annular boss, and the periphery of the boss is provided with an annular limiting groove, and the first sealing ring (3) is engaged in the limiting groove.
5. The low-operating-force bidirectional switching liquid separator valve core according to claim 1, characterized in that, The first guide block (7) has a sealing plate (17) on its upper side. The periphery of the sealing plate (17) is in sealed contact with the inner wall of the housing (1). The push rod (2) is movably sealed through the sealing plate (17).
6. The low-operating-force bidirectional switching liquid separator valve core according to claim 1, characterized in that, The upper end of the push rod (2) is connected to a tube column (18) by a thread, and the push rod (2) is connected to the button assembly through the tube column (18).
7. A low-operating-force bidirectional switching liquid separator valve core according to claim 6, characterized in that, The button assembly includes a button cap (22) and a bushing (19) connected to the button cap (22); The tubing (18) is inserted into the bushing (19), and the tubing (18) is provided with a wing plate (20) on its periphery. A return spring (21) is provided between the wing plate (20) and the first guide block (7). When the button cap (22) is pressed for the first time, the hook on the side wall of the bushing (19) engages with the locking block on the inner wall of the housing (1) under the guidance of the button cap (22), and the push rod (2) is pressed down and remains locked; when pressed again, the inclined block of the button cap (22) drives the bushing (19) to rotate by a predetermined angle, the hook disengages from the locking block, and the reset spring (21) pushes the wing plate (20) to make the push rod (2) spring back to the initial position.