Lateral liquid inlet two-way transposition liquid separation valve element

Abstract

The utility model discloses a side liquid inlet two-way transposition liquid separation valve element which comprises a first shell and a piston column. A vertically-through piston cavity is formed in the first shell, a first liquid outlet is formed in the bottom of the first shell, and a second liquid outlet and a liquid inlet located below the second liquid outlet are formed in the side wall of the first shell. The first liquid outlet, the second liquid outlet and the liquid inlet are all communicated with the piston cavity; a flow guide cavity is formed in the piston column, the bottom of the piston column is closed, a flow guide outlet and a flow guide inlet located below the flow guide outlet are formed in the side wall of the piston column, and the flow guide outlet and the flow guide inlet are communicated with the flow guide cavity. The piston column is coaxially and movably arranged in the piston cavity, and the outer wall of the piston column is in sliding sealing fit with the piston cavity; the three-way valve and the flow dividing function are integrated on the single valve element, space occupation and system complexity are remarkably reduced, and the problem that a traditional flow dividing valve cannot achieve flexible switching of bottom outlet / side outlet at the same time is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of liquid distribution valve, specifically to a side liquid inlet bidirectional transposition liquid distribution valve core. BACKGROUND

[0002] In the hydraulic pipeline system, the traditional double branch switching of liquid flow is usually completed by using a tee joint with two on-off valves. However, this combination not only increases the cost of the system, but also occupies a large space, which brings inconvenience to the design and installation of the system.

[0003] In addition, the conventional water distribution valve can only realize the single switching function of side inlet and bottom outlet or bottom inlet and side outlet, and it is difficult to meet the demand of flexible switching of liquid flow in some special application scenarios. This functional limitation limits the application range of the water distribution valve, and makes it necessary to use more complex and expensive valve group systems in some occasions that require complex liquid flow control.

[0004] Therefore, there is an urgent need in the market for a single valve core that integrates the functions of tee joint valve and flow distribution in one, to realize automatic switching of double branch liquid flow, while maintaining the compactness of the structure and the reasonableness of the cost. In addition, the valve core also needs to have reliable sealing performance to ensure that the liquid flow does not leak during switching, so as to meet the use requirements of high-precision hydraulic control system. SUMMARY

[0005] The utility model aims at the problems existing in the prior art, provides a kind of side liquid inlet bidirectional transposition liquid distribution valve core, integrates tee joint valve and flow distribution function in single valve core, significantly reduces space occupation and system complexity, solves the problem that traditional flow distribution valve cannot consider flexible switching of bottom outlet / side outlet.

[0006] To achieve the above object, the utility model adopts the technical scheme that:

[0007] A side liquid inlet bidirectional transposition liquid distribution valve core, comprising a first housing and a piston column; the interior of the first housing is provided with a piston cavity penetrating from top to bottom, the bottom is provided with a first liquid outlet, the side wall is provided with a second liquid outlet and a liquid inlet below the second liquid outlet; the first liquid outlet, the second liquid outlet and the liquid inlet are in communication with the piston cavity; the interior of the piston column is provided with a flow guide cavity, the bottom is closed, the side wall is provided with a flow guide outlet and a flow guide inlet below the flow guide outlet, the flow guide outlet and the flow guide inlet are in communication with the flow guide cavity respectively; the piston column is coaxially movably arranged in the piston cavity, the outer wall of the piston column is in sliding sealing cooperation with the piston cavity; when the piston column is located at a first position of the piston cavity, the bottom of the piston column is located between the second liquid outlet and the liquid inlet, the piston column blocks the second liquid outlet, and the liquid inlet is in communication with the first liquid outlet, realizing first liquid flow branch; when the piston column is located at a second position of the piston cavity, the bottom of the piston column is located below the liquid inlet, the bottom of the piston column blocks the first liquid outlet, the second liquid outlet is in communication with the flow guide outlet, the liquid inlet is in communication with the flow guide inlet, realizing second liquid flow branch.

[0008] The outer side of the piston column is sleeved with a first sealing ring, a second sealing ring and a third sealing ring, the first sealing ring and the second sealing ring are located above and below the flow guide outlet respectively, the second sealing ring and the third sealing ring are located above and below the flow guide inlet respectively; when the piston column is located at the first position of the piston cavity, the third sealing ring is located between the second liquid outlet and the liquid inlet; when the piston column is located at the second position of the piston cavity, the second liquid outlet is located between the first sealing ring and the second sealing ring, and the liquid inlet is located between the second sealing ring and the third sealing ring.

[0009] The upper end of the piston column protrudes out of the piston cavity, the upper side of the piston column is provided with a baffle, the lower end surface of the baffle is fixedly provided with a connecting column, the connecting column is inserted into the flow guide cavity and is in threaded connection with the inner wall of the flow guide cavity; a return spring is arranged between the baffle and the first housing.

[0010] The valve core further comprises a second shell which is detachably connected with the upper end of the first shell; an installation cavity is arranged in the second shell, and a self-locking button switch is arranged in the installation cavity; the upper end of the piston column extends into the installation cavity, and the baffle abuts against the self-locking button switch; when the self-locking button switch is pressed for the first time, the piston column is pushed to the second position, and the self-locking button switch is clamped and limited by the clamping block on the inner wall of the second shell, so that the piston column is kept in the second position; when the self-locking button switch is pressed again, the self-locking button switch is released from the clamping block on the inner wall of the second shell, and the piston column is returned to the first position under the action of the return spring.

[0011] The valve core comprises a plurality of liquid inlet ports and a plurality of second liquid outlet ports which are respectively distributed in a circumferential interval on the side wall of the first shell; and comprises a plurality of flow guiding outlet ports and a plurality of flow guiding inlet ports which are respectively distributed in a circumferential interval on the side wall of the piston column.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] By integrating the three-way valve and the flow splitting function in a single valve core, compared with the traditional three-way + double valve scheme, the space occupation is reduced by about 40%, and the space utilization is significantly improved.

[0014] The mechanical linkage type switching mechanism avoids the problem of synchronous control of multiple valves, simplifies the system structure, improves the reliability and stability of the system, and at the same time, reduces the number of valves and connection points, and reduces the risk of leakage.

[0015] Through the cooperative positioning of the three sealing rings, precise flow channel isolation is realized, reverse leakage and leakage of liquid flow are effectively prevented, the sealing ring is made of polytetrafluoroethylene composite material, the high-precision sealing performance is ensured, the friction coefficient is reduced, and the switching operation force is reduced by 45%. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0017] Figure 1 It is the overall structure schematic view of the valve core in an embodiment of the application;

[0018] Figure 2 It is the sectional view of the valve core in an embodiment of the application;

[0019] In the figure: 1, first housing; 2, piston column; 3, first liquid outlet; 4, second liquid outlet; 5, liquid inlet; 6, flow guide outlet; 7, flow guide inlet; 8, first sealing ring; 9, second sealing ring; 10, third sealing ring; 11, baffle; 12, connecting column; 13, return spring; 14, second housing; 15, self-locking button switch. DETAILED DESCRIPTION

[0020] The technical solutions of the utility model will be clearly and completely described below in combination with the drawings in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relation shown in the drawings, or the orientation or position relation when the product of the utility model is usually placed, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, structure and operation, so it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0022] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0023] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "set", "installed", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0024] In the hydraulic pipeline system, traditionally, two-way switching of liquid flow is usually completed by using a three-way with two on-off valves. However, this combination not only increases the cost of the system, but also occupies a large space, which brings inconvenience to the design and installation of the system.

[0025] Furthermore, conventional diverter valves typically only offer a single on / off function, allowing either side inlet / bottom outlet or bottom inlet / side outlet for liquid flow. This limitation makes it difficult to meet the requirements of flexible switching between side inlet / bottom outlet and side inlet / side outlet in certain special application scenarios. This functional limitation restricts the application range of diverter valves, necessitating the use of more complex and expensive valve assembly systems in situations requiring complex liquid flow control.

[0026] The embodiments of this application address the above-mentioned technical problems, such as... Figure 1 and Figure 2 As shown, a side-inlet bidirectional switching liquid distribution valve core is provided, including a first housing 1 and a piston column 2; the first housing 1 has a piston chamber that extends vertically through it, a first outlet 3 at the bottom, a second outlet 4 on the side wall, and an inlet 5 located below the second outlet 4; the first outlet 3, the second outlet 4, and the inlet 5 are all connected to the piston chamber; the piston column 2 has a flow guiding chamber inside it, the bottom of which is closed, and a flow guiding outlet 6 on the side wall and a flow guiding inlet 7 located below the flow guiding outlet 6, the flow guiding outlet 6 and the flow guiding inlet 7 being connected to the flow guiding chamber respectively; the piston column 2 is connected to the piston chamber. The shaft is movably located inside the piston chamber, and its outer wall is in sliding sealing fit with the piston chamber. When the piston rod 2 is in the first position of the piston chamber, the bottom of the piston rod 2 is located between the second liquid outlet 4 and the liquid inlet 5. The piston rod 2 blocks the second liquid outlet 4 and connects the liquid inlet 5 with the first liquid outlet 3 to realize the first liquid flow diversion. When the piston rod 2 is in the second position of the piston chamber, the bottom of the piston rod 2 is located below the liquid inlet 5. The bottom of the piston rod 2 blocks the first liquid outlet 3. The second liquid outlet 4 is connected to the guide outlet 6, and the liquid inlet 5 is connected to the guide inlet 7 to realize the second liquid flow diversion.

[0027] The dual-channel switching valve core achieves automatic switching between the two channels through the axial displacement of piston 2. When piston 2 is in the first position, as... Figure 2 As shown, the piston rod blocks the second outlet 4, while the inlet 5 and the first outlet 3 form a direct current path 5→3, realizing the first branching mode of side inlet and bottom outlet. When the piston rod 2 moves down to the second position, its bottom closes the first outlet 3. At this time, the guide inlet 7 connects with the inlet 5, and the guide outlet 6 connects with the second outlet 4. The liquid flow forms a zigzag flow channel of 5→7→6→4 through the guide cavity, completing the second branching mode of side inlet and side outlet. The conversion between the two states is completely controlled by the piston rod stroke, without the need for additional valves.

[0028] This liquid-dispensing valve core integrates a three-way valve and flow-dividing function into a single valve core, offering significant advantages over the traditional three-way + dual-valve solution. Through the nested design of the piston chamber and the flow-guiding chamber, dual-flow-channel switching is achieved within a compact space, reducing space occupation by approximately 40%. The mechanically linked switching mechanism avoids the problem of multi-valve synchronous control, improving reliability.

[0029] The liquid distribution valve core has simple and compact structure, is easy to manufacture and maintain, is suitable for various liquid flow control scenes, and is particularly suitable for tap pipeline systems, and solves the problem that the traditional distribution valve cannot flexibly switch between bottom outlet and side outlet.

[0030] In some embodiments, the outer side of the piston column 2 is sleeved with a first sealing ring 8, a second sealing ring 9 and a third sealing ring 10, the first sealing ring 8 and the second sealing ring 9 are located above and below the flow guide outlet 6 respectively, and the second sealing ring 9 and the third sealing ring 10 are located above and below the flow guide inlet 7 respectively; when the piston column 2 is located at the first position of the piston cavity, the third sealing ring 10 is located between the second liquid outlet 4 and the liquid inlet 5; when the piston column 2 is located at the second position of the piston cavity, the second liquid outlet 4 is located between the first sealing ring 8 and the second sealing ring 9, and the liquid inlet 5 is located between the second sealing ring 9 and the third sealing ring 10.

[0031] In the above embodiments, precise flow channel isolation is achieved through the cooperation of the three sealing rings. In the first position, the third sealing ring 10 is clamped between the second liquid outlet 4 and the liquid inlet 5, forming a physical isolation barrier to completely block the reverse leakage of 4→5; at the same time, the second sealing ring 9 establishes a dynamic sealing surface above the liquid inlet 5, ensuring that the liquid flow strictly follows the 5→3 path. When switched to the second position, the first sealing ring 8 rises above the second liquid outlet 4, forming a “double gate” structure with the second sealing ring 9, so that the second liquid outlet 4 falls into the 8-9 sealing interval, and at this time the 6→4 passage of the flow guide cavity is double-sealed; at the same time, the third sealing ring 10 moves downward to below the liquid inlet 5, preventing high-pressure liquid flow from leaking from the gap at the bottom of the piston column 2.

[0032] The sealing ring can be made of polytetrafluoroethylene composite material, which can reduce the friction coefficient and the switching operation force while ensuring sealing accuracy; the middle position of the second sealing ring 9 is designed to simultaneously bear the inlet / outlet port isolation function, which reduces one sealing element compared with the traditional double-sealing scheme. Experimental data shows that this structure can control the leakage in the valve core to be below 0.1L / min, which is suitable for high-precision hydraulic control systems.

[0033] In some embodiments, the upper end of the piston column 2 protrudes from the piston cavity, the upper side of the piston column 2 is provided with a baffle 11, the lower end surface of the baffle 11 is fixedly provided with a connecting column 12, the connecting column 12 is inserted into the flow guide cavity and is threadedly connected with the inner wall of the flow guide cavity; the baffle 11 and the first shell 1 are provided with a return spring 13.

[0034] In the above embodiments, the automatic reset function of the piston column 2 is achieved through the linkage design of the baffle 11, the connecting column 12, and the reset spring 13. When the piston column 2 is in the first position, the reset spring 13 is in a pre-compressed state, storing elastic potential energy; when it is necessary to switch to the second position, an external driving force pushes the baffle 11 downward, and the connecting column 12 connected by threads drives the piston column 2 to move downward synchronously, at this time the reset spring 13 is further compressed to store energy; after the external force is removed, the reset spring 13 releases energy, pushes the baffle 11 upward, and drives the piston column 2 to reset accurately to the first position.

[0035] The connecting column 12 is connected by threads for easy disassembly and maintenance. The reset spring 13 is made of corrosion-resistant alloy material, and the spring force attenuation is less than 5% after 1 million fatigue tests.

[0036] In some embodiments, the liquid distribution valve core further comprises a second housing 14 which is detachably connected to the upper end of the first housing 1; the inside of the second housing 14 is provided with a mounting cavity, and the mounting cavity is provided with a self-locking button switch 15; the upper end of the piston column 2 extends into the mounting cavity, and the baffle 11 abuts against the self-locking button switch 15; when the self-locking button switch 15 is pressed for the first time, the piston column 2 is pushed to the second position, and the self-locking button switch 15 is limited by the clamping block on the inner wall of the second housing 14, so that the piston column 2 remains in the second position; when the self-locking button switch 15 is pressed again, the self-locking button switch 15 is released from the clamping block on the inner wall of the second housing 14, and the piston column 2 returns to the first position under the action of the reset spring 13.

[0037] The above embodiments realize the convenient manual control of the liquid distribution valve core by integrating the self-locking button switch 15. When the self-locking button switch 15 is pressed for the first time, it pushes the baffle 11 to move downward against the resistance of the reset spring 13, and drives the piston column 2 to move accurately to the second position; at this time, the self-locking button switch 15 and the clamping block on the inner wall of the second housing 14 form a mechanical interlock, ensuring that the piston column 2 remains stably in the second working position. When it is necessary to reset, the self-locking button switch 15 is pressed again to release the clamping block, and the reset spring 13 immediately releases the stored energy to push the piston column 2 to return quickly to the first position. The second housing 14 and the first housing 1 are detachably connected by threads or buckles, which is convenient for maintenance.

[0038] The structure of the self-locking button switch can be a prior art. For example, the valve core switch structure disclosed in patents CN109630746A and CN219493225U can be used. The self-locking button switch 15 integrates a mechanical self-locking function, which can maintain the working state without continuous force, and realizes a double-stage pressing function. The first pressing realizes the propulsion and locking of the piston column, and the second pressing realizes the unlocking and return, which simplifies the operation process.

[0039] In some embodiments, the liquid distribution valve core comprises a plurality of liquid inlet ports 5 and a plurality of second liquid outlet ports 4, which are respectively distributed in the side wall of the first shell 1 at intervals; and a plurality of flow guide outlets 6 and a plurality of flow guide inlets 7, which are respectively distributed in the side wall of the piston column 2 at intervals.

[0040] In the above embodiments, the plurality of liquid inlet ports 5 and the plurality of second liquid outlet ports 4 are uniformly distributed along the circumference of the side wall of the first shell 1, forming a symmetrical flow channel network; correspondingly, the plurality of flow guide outlets 6 and the plurality of flow guide inlets 7 on the side wall of the piston column 2 are also arranged at the same angle intervals. When the piston column 2 is in the first position, all the liquid inlet ports 5 and the first liquid outlet port 3 form a parallel passage, realizing large flow straight-through; when switched to the second position, each flow guide inlet 7 is precisely connected with the corresponding liquid inlet port 5, and the flow guide outlet 6 and the second liquid outlet port 4 form a multi-way distribution, ensuring uniform distribution of flow. This structural design enables the valve core to have a compact structure while improving the flow capacity by 2-3 times.

[0041] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A side-inlet bidirectional switching liquid distribution valve core, characterized in that, It includes a first housing (1) and a piston rod (2); The first housing (1) has a piston chamber that runs vertically through it. The bottom has a first liquid outlet (3), the side wall has a second liquid outlet (4), and the inlet (5) is located below the second liquid outlet (4). The first liquid outlet (3), the second liquid outlet (4), and the inlet (5) are all connected to the piston chamber. The piston rod (2) has a flow guide cavity inside, the bottom is closed, and the side wall has a flow guide outlet (6) and a flow guide inlet (7) located below the flow guide outlet (6). The flow guide outlet (6) and the flow guide inlet (7) are respectively connected to the flow guide cavity. The piston rod (2) is coaxially and movably disposed in the piston cavity, and its outer wall is in sliding sealing fit with the piston cavity; When the piston rod (2) is located in the first position of the piston chamber, the bottom of the piston rod (2) is located between the second liquid outlet (4) and the liquid inlet (5). The piston rod (2) blocks the second liquid outlet (4) and connects the liquid inlet (5) with the first liquid outlet (3) to realize the first liquid flow diversion. When the piston rod (2) is in the second position of the piston chamber, the bottom of the piston rod (2) is below the liquid inlet (5), the bottom of the piston rod (2) blocks the first liquid outlet (3), the second liquid outlet (4) is connected to the guide outlet (6), and the liquid inlet (5) is connected to the guide inlet (7), thereby realizing the second liquid flow splitting.

2. The side-inlet bidirectional switching liquid distribution valve core according to claim 1, characterized in that, The piston rod (2) is fitted with a first sealing ring (8), a second sealing ring (9) and a third sealing ring (10). The first sealing ring (8) and the second sealing ring (9) are located above and below the flow outlet (6) respectively, and the second sealing ring (9) and the third sealing ring (10) are located above and below the flow inlet (7) respectively. When the piston rod (2) is in the first position of the piston chamber, the third sealing ring (10) is located between the second liquid outlet (4) and the liquid inlet (5); when the piston rod (2) is in the second position of the piston chamber, the second liquid outlet (4) is located between the first sealing ring (8) and the second sealing ring (9), and the liquid inlet (5) is located between the second sealing ring (9) and the third sealing ring (10).

3. The side-inlet bidirectional switching liquid distribution valve core according to claim 1, characterized in that, The upper end of the piston rod (2) extends out of the piston cavity. A baffle (11) is provided on the upper side of the piston rod (2). A connecting post (12) is fixedly provided on the lower end face of the baffle (11). The connecting post (12) is inserted into the flow guide cavity and is threadedly connected to the inner wall of the flow guide cavity. A return spring (13) is provided between the baffle (11) and the first housing (1).

4. The side-inlet bidirectional switching liquid distribution valve core according to claim 3, characterized in that, It also includes a second housing (14), which is detachably connected to the upper end of the first housing (1); the second housing (14) has an installation cavity inside, and a self-locking push button switch (15) is provided in the installation cavity; the upper end of the piston column (2) extends into the installation cavity, and the baffle (11) abuts against the self-locking push button switch (15); When the self-locking button switch (15) is pressed for the first time, the piston rod (2) is pushed to the second position, and the self-locking button switch (15) is engaged with the locking block on the inner wall of the second housing (14) for a limited position; when the self-locking button switch (15) is pressed again, the self-locking button switch (15) is disengaged from the locking block on the inner wall of the second housing (14), and the piston rod (2) retracts to the first position under the force of the return spring (13).

5. The side-inlet bidirectional switching liquid distribution valve core according to claim 1, characterized in that, It includes several liquid inlets (5) and several second liquid outlets (4), which are circumferentially spaced on the side wall of the first housing (1); it also includes several flow outlets (6) and several flow inlets (7), which are circumferentially spaced on the side wall of the piston column (2).

Images