Liquid distribution valve element with bidirectional transposition function
The design of the liquid distribution valve core with bidirectional switching function realizes rapid switching of liquid flow path and efficient sealing, which solves the problems of complex assembly, easy leakage and jamming of traditional three-way valve cores, and improves the pressure resistance level and service life.
Patent Information
- Application Number
- CN202520341836.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-27
AI Technical Summary
Traditional three-way valve cores have problems such as a large number of parts, complex assembly, easy leakage, high energy consumption, serious jamming, and easy deformation under high pressure.
The liquid distribution valve core design with bidirectional switching function achieves rapid switching of liquid flow path through the linkage of a single piston assembly and push rod, combined with the air chamber pressure balancing mechanism. The double-layer shell structure shares the stress and avoids deformation of the single-layer shell.
It reduces manufacturing costs and failure rate, improves pressure resistance and service life, reduces operating force by 40%, eliminates jamming, and has excellent sealing performance.
Smart Images
Figure CN223740085U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of liquid separator technology, specifically to a liquid separator core with bidirectional switching function. Background Technology
[0002] In the field of fluid control, three-way valve cores, as the core component for achieving fluid circuit switching, are widely used in sanitary ware, industrial piping systems, and medical instruments. Traditional three-way valve cores mostly use rotary sealing structures or electromagnetic drive modules to achieve fluid circuit switching, which has the following technical defects.
[0003] First, rotary valve cores rely on precision-machined valve stems and seats, requiring multiple annular sealing rings to prevent crossflow, resulting in a large number of parts and complex assembly processes. After prolonged use, the sealing surfaces are prone to wear and leakage. While electromagnetically driven valve cores simplify the mechanical structure, they require additional electromagnetic coils and control circuits, leading to high energy consumption, sensitivity to electromagnetic interference, and coil aging under high temperatures. Second, existing push-rod valve cores easily create a hydraulic pressure difference on both sides of the piston when switching fluid paths, causing a sudden increase in operating resistance and potential jamming when pressed. Some products attempt to add pressure relief holes to the piston, but the static hole structure cannot adapt to dynamic pressure changes, instead causing fluid flow disturbance and noise. Furthermore, single-layer shell valve cores require significantly increased shell wall thickness to prevent deformation when subjected to high-pressure fluid flow, but limited installation space often leads to micro-cracks in stress concentration areas. Utility Model Content
[0004] The purpose of this invention is to address the problems existing in the prior art by providing a liquid separator valve core with bidirectional switching function, which enables rapid switching of liquid flow paths, reduces manufacturing costs and failure rates, and improves the pressure resistance and service life of the valve core.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A liquid-dispensing valve core with bidirectional switching function includes a first housing, a second housing, a button assembly, a push rod, and a piston. The sidewall of the first housing has a first outlet, an inlet, and a guide port arranged sequentially from top to bottom, and the lower end of the first housing is closed. The second housing is fitted over the lower outer part of the first housing and covers the guide port. The lower end of the second housing has a second outlet, and the inner wall of the second housing has a guide channel connecting the guide port and the second outlet. The first housing has a partition plate that divides its interior into upper and lower parts. The partition plate is located above the first outlet, and the push rod movably and sealably passes through the partition plate. The upper end of the push rod is connected to the button assembly. The piston has a piston at its lower end connected to the push rod. The push rod has an air chamber, and its upper end has an upper through hole connecting to the air chamber. The piston has a lower through hole connecting to the air chamber at its lower end. The piston includes a cylinder and a first and a second sealing plate connected to the cylinder. The peripheral walls of both the first and second sealing plates are in a movable sealing fit with the inner wall of the first housing. When the piston is in a first position, the first sealing plate is located between the first liquid outlet and the liquid inlet, and the second sealing plate is located below the guide port, thus achieving a first liquid flow diversion. When the piston is in a second position, the first sealing plate is located below the liquid inlet, thus achieving a second liquid flow diversion.
[0007] Furthermore, the inner wall of the second housing is provided with a plurality of circumferentially distributed guide strips, which abut against the outer wall of the first housing, and a guide channel is formed between every two adjacent guide strips.
[0008] Furthermore, the lower end of the push rod has an external thread on its outer wall, and the upper end of the piston has a threaded hole. The push rod and the piston are connected by a thread.
[0009] Furthermore, a first sealing ring is provided on the outer periphery of the first partition plate, and the first partition plate is movably sealed to the inner wall of the first housing through the first sealing ring; a second sealing ring is provided on the outer periphery of the second partition plate, and the second partition plate is movably sealed to the inner wall of the first housing through the second sealing ring.
[0010] Furthermore, the button assembly includes a button cap and a bushing connected to the button cap. The bushing has a hook on its side wall, and the inner wall of the first housing has a locking block that engages with the hook. The upper end of the push rod abuts against the bushing, and the outer side of the upper end of the push rod has a wing plate. A return spring is provided between the wing plate and the isolation plate. When the button cap is pressed for the first time, the button cap presses down the push rod, and the hook engages with the locking block. When the button cap is pressed again, the hook disengages from the locking block, and the button cap rebounds under the action of the return spring.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] By linking a single piston assembly with a push rod, precise switching between dual fluid circuits can be achieved with only linear displacement, avoiding the complex rotary sealing structure or electromagnetic drive module in traditional valve cores, and significantly reducing manufacturing costs and failure rates.
[0013] The push rod features a built-in air chamber and a two-way through-hole design, which dynamically adjusts the internal and external air pressure during piston movement, effectively offsetting the impact of hydraulic pressure fluctuations on button operation force. The switching operation force is reduced by 40%, and there is no jamming.
[0014] The second housing is nested outside the first housing to form a double-wall support structure, allowing the liquid to flow through the guide channel and exit from the second outlet at the bottom of the second housing. When subjected to high-pressure liquid flow, the two housings share the stress, avoiding the problem of easy deformation of a single-layer housing, and significantly improving the pressure resistance and service life of the valve core. Attached Figure Description
[0015] 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.
[0016] Figure 1 This is a schematic diagram of the overall structure of the liquid distribution valve core in one embodiment of this application;
[0017] Figure 2 This is a cross-sectional schematic diagram of the liquid distribution valve core in one embodiment of this application;
[0018] Figure 3 This is a schematic diagram of the push rod and piston in one embodiment of this application;
[0019] In the figure: 1. First housing; 11. First liquid outlet; 12. Liquid inlet; 13. Flow guide; 14. Isolation plate; 2. Second housing; 21. Second liquid outlet; 22. Flow guide channel; 23. Flow guide strip; 3. Button assembly; 31. Button cap; 32. Bushing; 4. Push rod; 41. Air chamber; 42. Upper through hole; 44. Wing plate; 45. Return spring; 5. Piston; 51. Lower through hole; 52. Column; 53. First sealing plate; 531. First sealing ring; 54. Second sealing plate; 541. Second sealing ring. Detailed Implementation
[0020] 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.
[0021] 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.
[0022] 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," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0023] 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.
[0024] In the field of fluid control, three-way valve cores, as the core component for achieving fluid circuit switching, are widely used in sanitary ware, industrial piping systems, and medical instruments. Traditional three-way valve cores mostly use rotary sealing structures or electromagnetic drive modules to achieve fluid circuit switching, which has the following technical defects.
[0025] First, rotary valve cores rely on precision-machined valve stems and seats, requiring multiple annular sealing rings to prevent crossflow, resulting in a large number of parts and complex assembly processes. After prolonged use, the sealing surfaces are prone to wear and leakage. While electromagnetically driven valve cores simplify the mechanical structure, they require additional electromagnetic coils and control circuits, leading to high energy consumption, sensitivity to electromagnetic interference, and coil aging under high temperatures. Second, existing push-rod valve cores easily create a hydraulic pressure difference on both sides of the piston when switching fluid paths, causing a sudden increase in operating resistance and potential jamming when pressed. Some products attempt to add pressure relief holes to the piston, but the static hole structure cannot adapt to dynamic pressure changes, instead causing fluid flow disturbance and noise. Furthermore, single-layer shell valve cores require significantly increased shell wall thickness to prevent deformation when subjected to high-pressure fluid flow, but limited installation space often leads to micro-cracks in stress concentration areas.
[0026] To address the above technical issues, such as Figures 1 to 3 As shown, this application embodiment provides a liquid separator valve core with bidirectional switching function, including a first housing 1, a second housing 2, a button assembly 3, a push rod 4, and a piston 5; the side wall of the first housing 1 is provided with a first outlet 11, an inlet 12, and a guide port 13 from top to bottom, and the lower end of the first housing 1 is closed; the second housing 2 is fitted around the lower outer side of the first housing 1 and covers the guide port 13, the lower end of the second housing 2 is provided with a second outlet 21, and the inner wall of the second housing 2 is provided with a guide channel 22 connecting the guide port 13 and the second outlet 21; the first housing 1 is provided with a partition plate 14 that divides its interior into upper and lower parts, the partition plate 14 is located above the first outlet 11, the push rod 4 movably and sealingly passes through the partition plate 14, and the upper part of the push rod 4... The lower end of the push rod 4 is connected to the piston 5. The push rod 4 is provided with an air chamber 41, and the upper end of the push rod 4 is provided with an upper through hole 42 for connecting the air chamber 41. The lower end of the piston 5 is provided with a lower through hole 51 for connecting the air chamber 41. The piston 5 includes a column 52 and a first sealing plate 53 and a second sealing plate 54 connected to the column 52. The peripheral sidewalls of the first sealing plate 53 and the second sealing plate 54 are in a movable sealing fit with the inner wall of the first housing 1. When the piston 5 is in the first position, the first sealing plate 53 is located between the first liquid outlet 11 and the liquid inlet 12, and the second sealing plate 54 is located below the liquid inlet 12, realizing the first liquid flow diversion. When the piston 5 is in the second position, the first sealing plate 53 is located below the liquid inlet 12, realizing the second liquid flow diversion.
[0027] In this embodiment, the bidirectional switching liquid distribution valve core achieves intelligent switching of the liquid flow path through the linkage design of the push rod and piston, combined with the air chamber pressure balancing mechanism.
[0028] When piston 5 is in the first position, the first sealing plate 53 is located between the first liquid outlet 11 and the liquid inlet 12, and the second sealing plate 54 is located below the guide port 13. After the liquid flows into the inner cavity of the first housing 1 through the liquid inlet 12, the flow direction is restricted by the sealed area formed by the first sealing plate 53 and the second sealing plate 54. The liquid flows through the guide port 13 into the guide channel 22 of the second housing 2, and finally exits from the second liquid outlet 21.
[0029] When button assembly 3 is pressed, push rod 4 moves piston 5 downward. Air below piston 5 communicates with the outside through lower through hole 51, air chamber 41 inside push rod 4, and upper through hole 42, forming a dynamic air pressure balance to prevent jamming due to hydraulic pressure or air resistance and ensure smooth piston movement. When piston 5 moves to the second position, first sealing baffle 53 passes over liquid inlet 12 and is located below it, and second sealing baffle 54 disengages from the guide port 13 area.
[0030] After piston 5 reaches the second position, a new fluid flow channel is formed between the first sealing baffle 53 and the isolation plate 14. The fluid enters through the inlet 12 and flows directly upwards through the first outlet 11, while the guide port 13 is sealed below by the first sealing baffle 53, blocking the path of the fluid flow from the guide port 13 to the second outlet 21. At this point, the fluid flow direction changes from output from the second outlet 21 to output from the first outlet 11, completing the fluid flow switching action.
[0031] By linking a single piston assembly with a push rod, precise switching between dual fluid circuits can be achieved with only linear displacement, avoiding the complex rotary sealing structure or electromagnetic drive module in traditional valve cores, thus significantly reducing manufacturing costs and failure rates.
[0032] The push rod 4 has a built-in air chamber 41 and a two-way through hole design, which dynamically adjusts the internal and external air pressure during piston movement, effectively offsetting the influence of hydraulic pressure fluctuations on button operation force, reducing switching operation force by 40%, and eliminating jamming.
[0033] The second housing 2 is nested outside the first housing 1 to form a double-wall support structure, so that the liquid flow is output from the second outlet 21 at the bottom of the second housing 2 through the guide channel 22. When subjected to high pressure liquid flow, the two housings share the stress, avoiding the problem of easy deformation of a single housing, and significantly improving the pressure resistance and service life of the valve core.
[0034] In some embodiments, the inner wall of the second housing 2 is provided with a plurality of circumferentially distributed guide strips 23, the guide strips 23 abutting against the outer wall of the first housing 1, and a guide channel 22 is formed between every two adjacent guide strips 23.
[0035] The flow guide strip 23 forms multi-point support at the contact surface with the first shell 1, avoiding local stress concentration and suppressing shell vibration caused by fluid pulsation. At the same time, the flow guide strip 23 acts as a reinforcing rib of the inner wall of the second shell 2, improving the circumferential stiffness of the shell.
[0036] In some embodiments, the lower end of the push rod 4 has an external thread on its outer wall, and the upper end of the piston 5 has a threaded hole. The push rod 4 and the piston 5 are connected by threads.
[0037] The threaded connection allows the piston 5 to be quickly separated from the push rod 4, facilitating the individual replacement of worn parts, such as the sealing ring, without the need to replace the entire valve core, thus reducing operating costs.
[0038] In some embodiments, a first sealing ring 531 is provided on the outer periphery of the first sealing plate 53, and the first sealing plate 53 is movably sealed with the inner wall of the first housing 1 through the first sealing ring 531; a second sealing ring 541 is provided on the outer periphery of the second sealing plate 54, and the second sealing plate 54 is movably sealed with the inner wall of the first housing 1 through the second sealing ring 541.
[0039] By setting the first sealing ring 531 and the second sealing ring 541 to dynamically fit with the inner wall of the first housing 1, the dynamic sealing performance of the first sealing plate 53 and the second sealing plate 54 is improved, ensuring that the valve core is not prone to failure under high pressure and high frequency conditions.
[0040] In some embodiments, the button assembly 3 includes a button cap 31 and a bushing 32 connected to the button cap. The side wall of the bushing 32 is provided with a hook, and the inner wall of the first housing 1 is provided with a locking block that cooperates with the hook. The upper end of the push rod 4 abuts against the bushing 32. The outer side of the upper end of the push rod 4 is provided with a wing plate 44, and a return spring 45 is provided between the wing plate 44 and the isolation plate 14. When the button cap 31 is pressed for the first time, the button cap 31 presses down the push rod 4, and the hook and the locking block engage. When the button cap 31 is pressed again, the hook and the locking block disengage, and the button cap 31 rebounds under the action of the return spring 45.
[0041] When the button cap 31 is pressed for the first time, the hook on the side wall of the bushing 32 engages with the locking block on the inner wall of the first housing 1 under the guidance of the inclined surface, and the push rod 4 is pressed down and remains locked. When pressed again, the button cap 31 drives the bushing 32 to rotate a specific angle, the hook disengages from the locking block, and the return spring 45 pushes the wing plate 44 to make the push rod 4 return to the initial position. The hook-locking block mechanical interlock provides clear position feedback, realizes bistable switching, and has high reliability.
[0042] 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 valve core for separating liquids with bidirectional commutation, characterized in that, The utility model provides a liquid flow control device, which comprises a first shell (1), a second shell (2), a button assembly (3), a push rod (4) and a piston (5); The sidewall of the first shell (1) is sequentially provided with a first liquid outlet (11), a liquid inlet (12) and a flow guide opening (13) from top to bottom, and the lower end of the first shell (1) is closed; The second shell (2) is sleeved on the outer side of the lower part of the first shell (1) and covers the flow guide opening (13), the lower end of the second shell (2) is provided with a second liquid outlet (21), and the inner wall of the second shell (2) is provided with a flow guide channel (22) connecting the flow guide opening (13) and the second liquid outlet (21); The first shell (1) is provided with a partition plate (14) for separating the inside of the first shell (1) into two parts, the partition plate (14) is located above the first liquid outlet (11), the push rod (4) passes through the partition plate (14) in a movable sealing manner, the upper end of the push rod (4) is connected with the button assembly (3), and the lower end of the push rod (4) is connected with the piston (5); The push rod (4) is provided with an air cavity (41), the upper end of the push rod (4) is provided with an upper through hole (42) connected with the air cavity (41), and the lower end of the piston (5) is provided with a lower through hole (51) connected with the air cavity (41); The piston (5) comprises a column body (52) and first and second partition plates (53 and 54) connected with the column body (52), and the peripheral sidewalls of the first and second partition plates (53 and 54) are movably and sealingly matched with the inner wall of the first shell (1); When the piston (5) is located at a first position, the first partition plate (53) is located between the first liquid outlet (11) and the liquid inlet (12), and the second partition plate (54) is located below the flow guide opening (13), so that first liquid flow diversion is realized; When the piston (5) is located at a second position, the first partition plate (53) is located below the liquid inlet (12), so that second liquid flow diversion is realized.
2. The valve core with bidirectional commutation function according to claim 1, characterized in that, The inner wall of the second shell (2) is provided with a plurality of circumferentially distributed flow guide strips (23), the flow guide strips (23) abut against the outer wall of the first shell (1), and the flow guide channel (22) is formed between every two adjacent flow guide strips (23).
3. The valve core of claim 1, wherein, The lower end of the push rod (4) is provided with an external thread, the upper end of the piston (5) is provided with a threaded hole, and the push rod (4) and the piston (5) are connected through threads.
4. The valve core of claim 1, wherein, The peripheral side of the first partition plate (53) is provided with a first sealing ring (531), and the first partition plate (53) is movably and sealingly matched with the inner wall of the first shell (1) through the first sealing ring (531); The peripheral side of the second partition plate (54) is provided with a second sealing ring (541), and the second partition plate (54) is movably and sealingly matched with the inner wall of the first shell (1) through the second sealing ring (541).
5. The valve core with bidirectional commutation function according to claim 1, characterized in that, The button assembly (3) comprises a cap (31) and a bushing (32) connected with the cap, a side wall of the bushing (32) is provided with a hook, an inner wall of the first shell (1) is provided with a clamping block matched with the hook; an upper end of the push rod (4) is in abutment with the bushing (32), an outer side of the upper end of the push rod (4) is provided with a wing plate (44), and a reset spring (45) is arranged between the wing plate (44) and the isolation plate (14); When the cap (31) is pressed for the first time, the cap (31) presses down the push rod (4), and the hook is in clamping and matching connection with the clamping block; when the cap (31) is pressed again, the hook is separated from the clamping block, and the cap (31) rebounds under the action of the reset spring (45).