Three-way reversing ball valve

Abstract

The invention relates to the technical field of fluid control valves, in particular to a three-way reversing ball valve. The three-way reversing ball valve comprises a valve body, a valve core and a rotary driving mechanism, the valve element is rotationally connected to the valve cavity, a flow channel is formed in the valve element, and at least one flexible part is arranged on the wall of the flow channel. The core is that a turbulent flow triggering mechanism is arranged, and the mechanism responds to the rotating motion of the valve element and applies acting force to the flexible part to enable the flexible part to deform; when the valve core rotates to a slurry filling position for communicating the main interface with the first auxiliary interface, the runner is unobstructed; and when the flow channel rotates to a flushing position for communicating the main connector with the second auxiliary connector, the turbulent flow triggering mechanism is automatically triggered, so that the flexible part deforms inwards, and the local cross sectional area of the flow channel is reduced or a turbulent flow structure protruding inwards is formed. Self-adaptive adjustment of two working conditions of slurry low-resistance conveying and flushing water efficient cleaning on a single valve is achieved, and the single valve is particularly suitable for grouting backfilling and pipeline cleaning procedures in mining and civil engineering construction.

Description

Technical Field

[0001] This application relates to the field of fluid control valve technology, and in particular to a three-way directional ball valve. Background Technology

[0002] In mining and civil construction, particularly in processes involving grouting and backfilling such as foundation reinforcement, pile foundation engineering, and tunnel lining, there are typically two key fluid delivery stages. The first stage involves the injection of high-concentration and high-viscosity grout, including cement grout, cement mortar, or chemical grout. The second stage is the flushing of the delivery pipelines and valve bodies with clean water or low-pressure flushing water after the injection is completed.

[0003] Currently, this process commonly uses a three-way directional valve as the core component for flow path switching. Its typical operating mode is as follows: During the grouting stage, the valve switches to the slurry path, connecting the main pipeline from the pumping equipment to the grouting branch leading to the backfill area. This ensures the slurry can pass through with minimal resistance and maximum flow, thus preventing sedimentation and blockage. During the flushing stage, the valve switches to the flushing water path, connecting the main pipeline to the flushing branch leading to the drainage or recycling system. High-speed water flow thoroughly flushes the valve chamber and upstream pipes to prevent slurry residue and solidification.

[0004] However, traditional three-way directional valves have significant limitations in practical applications, as the shape and size of the internal flow channel of their valve core remain fixed. This fixed structure leads to a dilemma when facing two different operating conditions. Specifically, to ensure smooth slurry injection, the flow channel is usually designed to be relatively wide and straight to reduce flow resistance. However, when the valve switches to flushing mode, the excessively large cross-sectional area of ​​the flow channel will significantly reduce the water flow velocity, weakening the flushing force and turbulence effect required for flushing, resulting in low cleaning efficiency. Slurry residue can easily remain in the dead corners of the valve cavity, and long-term accumulation may cause valve jamming or seal failure. Conversely, if the flow channel is designed to be smaller to improve the flushing effect, it will severely hinder the passage of slurry and may even directly lead to the risk of blockage.

[0005] Therefore, there has long been a pressing technical need in this field: to develop a three-way directional valve that can intelligently adapt to different fluid conditions. An ideal valve should be able to automatically adjust the hydrodynamic characteristics of its internal flow channels while switching flow paths. Specifically, it should provide an unobstructed flow path when conveying slurry, and actively form a local throttling or turbulence structure in a specific branch, i.e., the flushing branch, during flushing, thereby increasing the water flow velocity, enhancing turbulence, and achieving efficient and thorough cleaning, while maintaining a compact valve structure and coordinated operation. In the existing technology, there is still a lack of a solution that can achieve both flow path switching and adaptive flow channel adjustment functions in one integrated manner through a single valve core rotation operation. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, this application provides a three-way reversing ball valve that can automatically change the internal flow channel shape according to the switching flow path, thereby simultaneously meeting the two very different working conditions of low-resistance slurry conveying and efficient cleaning of flushing water.

[0007] This application is achieved through the following technical solution: A three-way reversing ball valve, comprising: The valve body has a valve cavity in the middle, and the valve body is provided with a main interface, a first auxiliary interface and a second auxiliary interface that communicate with the valve cavity; A valve core is rotatably connected in the valve cavity, and the valve core has a flow channel that allows fluid to pass through, and the wall of the flow channel includes at least one flexible part that can undergo elastic deformation. A rotary drive mechanism, fixed on the valve body, is used to drive the valve core to rotate and adjust the position of the internal flow channel in the valve cavity so that the two ends of the flow channel can selectively connect with the main interface and the first auxiliary interface or the main interface and the second auxiliary interface as the valve core rotates. The turbulence triggering mechanism is configured to apply a force to the flexible part in response to the rotational movement of the valve core, causing the flexible part to deform so that the local cross-sectional area of ​​the flow channel is reduced or an inwardly bulging turbulence structure is formed when the flow channel is connected to the main interface and the second sub-interface.

[0008] By adopting the above technical solution, the flow path switching function and the adaptive flow channel adjustment function are integrated into a single valve body. During civil engineering grouting and backfilling construction, when the valve core rotates to the first position to connect the main interface and the first auxiliary interface as a grout passage, the flow channel remains unchanged, providing a wide and low-resistance channel for high-viscosity grout, ensuring grouting efficiency and preventing blockage. When flushing is required, the valve core is driven to rotate to the second position to connect the main interface and the second auxiliary interface as a flushing water path. This rotation action synchronously triggers the turbulence triggering mechanism, forcing the flexible part of the flow channel to deform. This deformation causes the flow channel to automatically form local throttling or turbulence protrusions in the flushing branch, thereby significantly improving the flow rate and turbulence intensity of the flushing water, achieving efficient and thorough cleaning of the valve cavity and pipeline, and solving the technical contradiction that traditional fixed flow channel three-way reversing ball valves cannot simultaneously ensure smooth grout delivery and efficient cleaning.

[0009] Optionally, the upper end of the valve core is provided with a valve stem, and an operating cavity is formed inside; the operating cavity is provided with a lower pressure plate for pressing the flexible part and an elastic element for driving the lower pressure plate away from the flexible part; the valve stem is provided with an axial guide hole; the turbulence triggering mechanism includes a lower pressure assembly and a trigger rod slidably connected in the guide hole. The lower pressure assembly can drive the trigger rod to act on the lower pressure plate during the rotation of the valve core, so that the lower pressure plate overcomes the force of the elastic element and moves towards the flexible part, so as to abut against the flexible part and drive the flexible part to deform.

[0010] By adopting the above technical solution, when the valve core is rotated to the flushing position, the pressure assembly is triggered, and the action is precisely transmitted to the pressure plate in the operating chamber through the trigger rod; the pressure plate moves down overcoming the resistance of the elastic element, and directly and controllably applies pressure to the flexible part of the flow channel to produce deformation; after flushing, the valve core is rotated in the opposite direction, and the pressure plate automatically resets under the action of the elastic element, and the flow channel returns to its original state, preparing for the next slurry injection; the whole process is seamlessly linked with the valve operation, realizing automation of adjustment upon switching.

[0011] Optionally, the lower pressure plate is fixed to the lower end of the trigger rod; the top of the operating cavity is provided with a limiting cover, and the trigger rod is provided with a positioning protrusion ring; the elastic element is sleeved on the trigger rod and placed between the limiting cover and the positioning protrusion ring.

[0012] By adopting the above technical solution, the lower pressure plate and the trigger rod are fixedly connected to form an integral moving part, which simplifies the internal structure, reduces the number of moving connection points, and improves the reliability of operation in environments filled with slurry residue or impurities; the elastic element sleeved on the trigger rod provides direct restoring force, which is simple in structure, easy to assemble, reduces manufacturing and maintenance costs, and is suitable for use in construction site environments.

[0013] Optionally, the lower pressure plate is hinged to the inner wall of the operating cavity, and a guide groove is provided on the back of the lower pressure plate; the end of the trigger rod is provided with a pusher that is slidably connected in the guide groove; the elastic element is a torsion spring provided at the hinge of the lower pressure plate.

[0014] By adopting the above technical solution, a more compact and faster flexible part triggering method is provided. The lower pressure plate is installed on the inner wall of the operating cavity through a hinge, forming a lever-type swing structure. When the trigger rod moves down, the pusher at its end slides along the guide groove on the back of the lower pressure plate, efficiently converting the vertical linear motion of the trigger rod into the swing motion of the lower pressure plate around the hinge point. This design has the following advantages: First, the sliding cooperation between the pusher and the guide groove achieves a smooth conversion of motion, allowing the lower pressure plate to press the flexible part in a frontal vertical posture, ensuring that the force is transmitted evenly and directly, avoiding deformation deviation caused by lateral force components. Second, the swing structure reduces sliding friction pairs, making the lower pressure plate respond more quickly and sensitively to the action of the trigger rod, improving the linkage efficiency between valve core rotation and flow channel deformation. Third, using a torsion spring as an elastic element directly set at the hinge not only saves axial space in the operating cavity, making the overall structure of the valve core more compact, but also provides a stable and linear reset torque, ensuring that the lower pressure plate quickly and accurately resets after disengaging from the trigger, preparing for the next action. This structure is particularly suitable for applications with strict space constraints and a requirement for rapid response.

[0015] Optionally, the pressing assembly includes a pin fixed on the valve body and an arc-shaped guide surface on the trigger rod; the arc-shaped guide surface can abut against the pin under the action of the elastic element; a limiting key is provided between the trigger rod and the guide hole to limit the rotation of the trigger rod.

[0016] By adopting the above technical solution, the rotational motion is converted into the linear motion of the trigger rod by utilizing the interaction between the fixed ejector pin and the arc-shaped guide surface on the rotating valve stem, which is ingenious. In mining and civil construction, when the valve core rotates from the slurry passage to the flushing water passage, the arc-shaped guide surface slides along the ejector pin surface. At a specific angle, the ejector pin rises to the high point of the arc-shaped surface, thereby pressing down the trigger rod. This design allows the trigger point to be precisely set at the required rotation angle, ensuring that the flow channel deformation is only activated when switching to the flushing branch, while the flow channel remains completely unobstructed when switching to the slurry branch, resulting in precise and absolutely synchronized control.

[0017] Optionally, a slit limiting groove communicating with the guide hole is provided on the middle section side wall of the valve stem, a support rod is provided on the valve body, and a pin is provided on the support rod. The pin abuts against the arc-shaped guide surface in the slit limiting groove; the upper end of the valve stem is connected to the rotary drive mechanism.

[0018] By adopting the above technical solution, the design of the slit limiting groove provides installation and movement space for the ejector pin, while also forming a mechanical limit on the rotation angle of the valve stem to prevent over-rotation; the support rod enhances the rigidity of the ejector pin; this structure integrates triggering, guiding and limiting functions into one place, with high space utilization, good overall rigidity, and the ability to withstand the impact of operating torque that may exist during construction, ensuring the accuracy and durability of long-term use.

[0019] Optionally, the flow channel has several through holes on the side wall near the operating cavity, and the flexible part is a flexible rubber membrane disposed in the through holes; the lower pressure plate has several arc-shaped protrusions that are adapted to the through holes; the arc-shaped protrusions abut against the flexible rubber membrane to provide support for the flexible rubber membrane.

[0020] By adopting the above technical solution, using discretely arranged flexible rubber membranes as local flexible parts to replace the overall deformation of the flow channel wall, several advantages are offered. During grout injection, each rubber membrane remains flat, the inner wall of the flow channel is smooth and continuous, and resistance is minimal. During flushing triggering, multiple arc-shaped protrusions on the lower pressure plate precisely lift each rubber membrane, forming a series of regularly arranged protruding turbulence columns within the flow channel. This structure not only effectively reduces the flow area but, more importantly, generates strong and uniform turbulence, greatly enhancing the shear force and scouring effect of the water flow, making it particularly suitable for removing cement slurry deposits adhering to the valve cavity wall. Simultaneously, the design of locally flexible membranes reduces the rigidity requirements of the overall structure, and damage to one membrane does not affect the function of other parts, making maintenance more convenient.

[0021] Optionally, the outer wall of the flow channel is provided with an installation groove adapted to the flexible rubber membrane, and a shaping cap is provided in the installation groove. The flexible rubber membrane is fixed in the receiving space enclosed by the shaping cap and the installation groove.

[0022] By adopting the above technical solution, the mounting groove and the shaped cap constitute a reliable and easily replaceable modular installation structure for the flexible rubber diaphragm. In high-wear and aging environments such as mining and civil construction, the flexible rubber diaphragm is a vulnerable component. This design allows for convenient inspection or replacement of individual rubber diaphragms without disassembling the entire valve core, significantly reducing valve maintenance difficulty and downtime, and improving equipment economy and service life. The shaped cap is adapted to the outer wall of the flow channel near the operating chamber, allowing the flexible rubber diaphragm to be shaped so that the inner wall of the flow channel fits the curved surface more closely in its natural state, making the slurry flow smoother.

[0023] Optionally, the lower pressure plate is adapted to the operating cavity and is slidably connected to the inner wall of the operating cavity, dividing the operating cavity into an upper movable cavity and a lower sealing cavity, with the flexible part located in the lower sealing cavity; the lower pressure assembly can drive the trigger rod to act on the lower pressure plate during the rotation of the valve core, causing the lower pressure plate to overcome the force of the elastic element and move towards the flexible part, thereby increasing the air pressure in the lower sealing cavity to drive the flexible part to deform.

[0024] By adopting the above technical solution, the lower pressure plate itself acts as a piston, dividing the operating chamber into an independent upper moving chamber and a lower sealing chamber, with the flexible part located in the lower sealing chamber. When the trigger rod is pushed downward by the turbulence triggering mechanism, the volume of the lower sealing chamber is compressed, and the gas pressure inside the chamber increases accordingly. The increased gas pressure acts evenly on all walls of the lower sealing chamber, including the back of the flexible part, thereby directly driving the flexible part to deform into the flow channel. This design highly integrates the power transmission medium and the actuator, eliminating the need for an additional piston structure, making the valve core more concise and compact. Furthermore, the gas pressure has isotropic physical characteristics, allowing the high pressure established in the lower sealing chamber to act on the entire back of the flexible part in a completely uniform manner, ensuring that the flexible part produces a smooth and symmetrical inward convex deformation. This uniform pressure avoids local stress concentration or asymmetrical deformation that may be caused by mechanical point contact or line contact, making the turbulence structure formed in the flow channel more regular and effective, and the flushing effect more stable and reliable.

[0025] Optionally, the first and second auxiliary interfaces are symmetrically arranged on the valve body with the axis of the main interface as the center, and the axis of the first or second auxiliary interface is deflected from the axis of the main interface by an angle of not less than 120°; the flow channel has an arc structure.

[0026] By adopting the above technical solutions, the symmetrical layout combined with the large-angle deflection of the arc flow channel optimizes the fluid dynamics performance. For slurry injection, the large radius of curvature of the arc flow channel can smoothly guide the slurry to change direction, greatly reducing local resistance and the risk of slurry deposition and blockage. For flushing water, the same flow channel, after deformation, can form a better match with the incoming flow direction, allowing the high-speed water flow to concentrate on impacting the easily scaled areas of the valve cavity, improving the targeting of cleaning. The symmetrical design also makes the valve more evenly stressed, suitable for bidirectional pressure conditions.

[0027] Optionally, the valve body is assembled from an upper valve cover and a lower valve seat, and the lower valve seat has a conical structure; the main interface is located on the lower valve seat, and the first secondary interface and the second secondary interface are located on the upper valve cover; at least two lifting lugs are evenly distributed on the side wall of the lower valve seat.

[0028] By adopting the above technical solutions, the split valve body design greatly facilitates the assembly, debugging, and maintenance of complex components such as the internal valve core and turbulence triggering mechanism; the conical lower valve seat helps fluid, especially slurry, to converge towards the main interface, reducing residue; in mining and civil construction sites, valves often need to be hoisted, transported, and positioned; the lifting lugs set on the lower valve seat provide a dedicated leverage point for safe hoisting, avoiding damage or interface deformation that may be caused by directly binding the valve body, improving the convenience and safety of construction and installation, and is a practical design that fully considers on-site engineering practices.

[0029] In summary, this application includes at least one of the following beneficial technical effects: This application innovatively integrates flow path switching and adaptive flow channel adjustment functions. During slurry injection, the flow channel remains unobstructed to ensure throughput; during rinsing, the flow channel automatically deforms to generate throttling and turbulence, improving cleaning efficiency. A single valve resolves two conflicting needs. The turbulence triggering mechanism of this application is a purely mechanical structure that is driven by the rotation of the valve core itself. It is automatically triggered only when switching to the flushing position and automatically resets when resetting. It requires no external control, is highly synchronized, and has high environmental adaptability and reliability. The external transmission mechanism of this application applies a controllable force to the local flexible part, generating reversible convex deformation that enhances turbulence, optimizing the flushing flow pattern. Furthermore, the modular design of the flexible part facilitates maintenance and replacement, extending the valve's service life, making it particularly suitable for slurry construction environments. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the three-way reversing ball valve described in Embodiment 1; Figure 2 This is a schematic diagram of the internal structure of the three-way reversing ball valve described in Embodiment 1; Figure 3 This is a schematic diagram of the turbulence triggering mechanism described in Embodiment 1; Figure 4 This is a schematic diagram of the slit limiting groove described in Embodiment 1; Figure 5 This is a schematic diagram of the flexible rubber membrane described in Example 1; Figure 6 This is a schematic diagram of the structure in Embodiment 1 showing the connection between the second sub-interface and the main interface; Figure 7 This is a schematic diagram of the internal structure of the three-way reversing ball valve described in Embodiment 2; Figure 8 This is a schematic diagram of the structure in Embodiment 2 where the second sub-interface is connected to the main interface; Figure 9 This is a schematic diagram of the internal structure of the three-way reversing ball valve described in Embodiment 3; Figure 10 This is a schematic diagram of the structure in Embodiment 3 where the second sub-interface is connected to the main interface.

[0031] In the diagram: 1. Valve body; 11. Upper valve cover; 111. First auxiliary interface; 112. Second auxiliary interface; 113. Support rod; 114. Ejector pin; 12. Lower valve seat; 121. Main interface; 122. Lifting lug; 13. Valve cavity; 2. Valve core; 21. Flow channel; 211. Flexible rubber diaphragm; 212. Molded gland; 22. Valve stem; 221. Guide hole; 222. Sectional limiting groove; 23. Operating cavity; 231. Lower pressure plate; 232. Compression spring; 233. Guide groove; 234. Arc protrusion; 235. Torsion spring; 236. Hinge seat; 237. Upper movable cavity; 238. Lower sealing cavity; 24. Trigger rod; 241. Push-pull; 242. Arc-shaped guide surface; 243. Positioning protrusion ring; 245. Limit key; 25. Limit cover; 3. Rotary drive mechanism. Detailed Implementation

[0032] The technical solutions of various embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Example 1

[0033] Reference Figures 1 to 3 This application discloses a three-way reversing ball valve, comprising: The valve body 1 has a valve cavity 13 formed in the middle, and the valve body 1 is provided with a main interface 121, a first secondary interface 111 and a second secondary interface 112 that communicate with the valve cavity 13; The valve core 2 is rotatably connected in the valve cavity 13, and the valve core 2 is provided with a flow channel 21 that allows fluid to pass through, and the wall of the flow channel 21 includes at least one flexible part that can undergo elastic deformation. A rotary drive mechanism 3 is fixed on the valve body 1 and is used to drive the valve core 2 to rotate and adjust the position of the internal flow channel 21 in the valve cavity 13 so that the two ends of the flow channel 21 can selectively connect with the main interface 121 and the first secondary interface 111 or the main interface 121 and the second secondary interface 112 as the valve core 2 rotates. The turbulence triggering mechanism is configured to apply a force to the flexible part in response to the rotational movement of the valve core 2, causing the flexible part to deform so that the local cross-sectional area of ​​the flow channel 21 is reduced or an inwardly protruding turbulence structure is formed when it is connected to the main interface 121 and the second sub-interface 112.

[0034] Specifically, refer to Figures 1 to 3 As an optional implementation, the rotary drive mechanism 3 can be a manually operated worm gear box, which is fixedly installed on the top of the valve body 1 by a flange, and its output shaft is connected to the upper end of the valve stem 22 by a flat key, thereby driving the valve stem 22 and the entire valve core 2 to rotate precisely in the valve cavity 13; the worm gear box can also be replaced by a servo motor, which can be operated by remote control.

[0035] Reference Figures 1 to 3 The valve body 1 is assembled from the upper valve cover 11 and the lower valve seat 12 by bolts. The lower valve seat 12 has a conical structure and a main interface 121 at the bottom center, which is used to connect the main pipe of conveying equipment such as mortar pump. The conical structure of the lower valve seat 12 is conducive to the slurry converging towards the main interface 121 under the action of gravity, reducing the dead corner of slurry deposition at the bottom of the valve cavity 13. Two lifting lugs 122 are symmetrically welded on the conical side wall of the lower valve seat 12, which facilitates hoisting, handling and positioning on the construction site.

[0036] Reference Figures 1 to 3 The upper valve cover 11 has symmetrically opened first auxiliary interfaces 111 and second auxiliary interfaces 112 on its side wall, and the angle between the axes of the two interfaces and the axis of the main interface 121 is not less than 120°. This design of not less than 120° greatly reduces the risk of local resistance and slurry deposition and blockage. The first auxiliary interface 111 is connected to the pipeline leading to the injection point, and the second auxiliary interface 112 is connected to the flushing pipeline leading to the sedimentation tank or drainage ditch. A conical valve cavity 13 is formed inside the valve body 1.

[0037] Reference Figures 3 to 5 The valve core 2 is rotatably connected to the valve cavity 13 via upper and lower bearings and is equipped with a sealing ring to ensure sealing. The valve core 2 has an arc-shaped flow channel 21 with a circular cross-section. Several circular through holes are evenly opened on the wall of the flow channel 21 along the arc direction. A flexible rubber membrane 211, which serves as a flexible part, is embedded in each through hole. The outer wall of the flow channel 21 is machined with an annular mounting groove corresponding to each through hole. The molded cap 212 presses and seals the edge of the flexible rubber membrane 211 in the mounting groove with screws to form several independent deformable units. This modular design facilitates the individual inspection and replacement of the flexible part.

[0038] Reference Figures 3 to 5The valve core 2 has a valve stem 22 at its upper end, and an axial guide hole 221 is machined inside the valve stem 22. An operating chamber 23 is formed inside the valve core 2 above the flow channel 21. The lower pressure plate 231 is directly fixed to the lower end of the trigger rod 24 by screws, forming an integrated transmission part. The compression spring 232, as an elastic element, is sleeved on the trigger rod 24, with its upper end abutting against the positioning protrusion ring 243 on the trigger rod 24 and its lower end abutting against the inner wall of the limiting cover 25 fixed at the top of the operating chamber 23. In order to prevent the trigger rod 24 from rotating axially in the guide hole 221, a limiting key 245 is provided between the trigger rod 24 and the guide hole 221 to limit the rotation of the trigger rod 24.

[0039] Reference Figures 4 to 6 The turbulence triggering mechanism includes a lower pressure assembly, a trigger rod 24, and a transmission part. The trigger rod 24 slides through the guide hole 221 of the valve stem 22, and its lower end extends into the operating chamber 23 and is provided with a pusher 241. The pusher 241 is slidably connected to the guide groove 233 provided on the back of the lower pressure plate 231, forming the transmission part. A slit limiting groove 222 is opened on the upper side wall of the valve stem 22. A support rod 113 is fixed on the top of the upper valve cover 11, and a vertically pointing ejector pin 114 is installed at the end of the support rod 113. The end of the ejector pin 114 extends into the slit limiting groove 222. An arc-shaped guide surface 242 that mates with the spherical end of the ejector pin 114 is machined in the area of ​​the slit limiting groove 222 on the trigger rod 24. Under the pre-tightening force of the compression spring 232, the arc-shaped guide surface 242 always keeps in contact with the end of the ejector pin 114.

[0040] The implementation principle of this embodiment is as follows: During the grouting stage of civil engineering construction, the operator drives the valve core 2 to rotate through the rotary drive mechanism 3, so that the two ends of the arc-shaped flow channel 21 inside it are aligned with the main interface 121 and the first auxiliary interface 111, respectively. At this time, the arc-shaped guide surface 242 on the trigger rod 24 is at the low position of the stroke starting when it contacts the ejector pin 114. Under the push of the compression spring 232, the lower pressure plate 231 is at the highest position, and the arc-shaped protrusion 234 at its bottom does not compress the flexible rubber membrane 211. The inner wall of the flow channel 21 is smooth and complete, providing an ideal channel with low resistance and high flow rate for high viscosity slurry, ensuring smooth grouting and preventing blockage. When the grouting is completed and it is necessary to switch to the flushing stage, the rotary drive mechanism 3 is operated to align the two ends of the flow channel 21 with the main interface 121 and the second auxiliary interface 112. During this rotation, the fixed ejector pin 114 slides along the arc-shaped guide surface 242 of the trigger rod 24 and gradually climbs to the highest point of the arc surface. This causes the trigger rod 24 and the lower pressure plate 231 to press downwards as a whole. The lower pressure plate 231 overcomes the resistance of the compression spring 232, thus converting it into a linear downward pressing action of the trigger rod 24. The arc-shaped protrusion 234 at its bottom synchronously and precisely presses downwards on the corresponding flexible rubber membrane 211, causing it to deform into a regular hemispherical protrusion inside the flow channel 21. These protrusion structures significantly reduce the local flow area of ​​the flow channel 21 in this area and form a strong turbulence source. When the flushing water passes through, the flow velocity increases sharply and generates strong turbulence and vortices, which efficiently and thoroughly flushes the valve cavity 13 and the connected upstream pipeline, effectively removing all slurry residue. When it is necessary to switch back to the filling state after flushing, the valve core 2 rotates, the ejector pin 114 slides away from the high point of the arc-shaped guide surface 242, and under the reset action of the compression spring 232, the lower pressure plate 231 moves upwards to reset. The flexible rubber membrane 211 returns to flatness under its own elasticity, and the flow channel 21 returns to a smooth state again. Example 2

[0041] Reference Figures 7 to 8 The difference between this embodiment and Embodiment 1 is that the inner wall of the operating cavity 23 is provided with a hinge seat 236; an arc-shaped lower pressure plate 231 is hinged to the hinge seat 236 by a hinge pin, and a torsion spring 235 as an elastic element is provided between the hinge seat 236 and the lower pressure plate 231, so as to always provide a restoring force for the lower pressure plate 231 to move upward. Of course, the same elastic restoring structure as in Embodiment 1 can also be used; the bottom surface of the lower pressure plate 231 is machined with several hemispherical arc protrusions 234, the positions of which correspond precisely to the through holes on the top wall of the flow channel 21.

[0042] The implementation principle of this embodiment is as follows: a more compact and faster flexible part triggering method is provided; the lower pressure plate 231 is installed on the inner wall of the operating cavity 23 by a hinge, so that the whole form a lever-type swing structure; when the trigger rod 24 moves down, the pusher 241 at its end slides along the guide groove 233 on the back of the lower pressure plate 231, efficiently converting the vertical linear motion of the trigger rod 24 into the swing motion of the lower pressure plate 231 around the hinge point, so that the lower pressure plate 231 can press the flexible part in a frontal vertical posture, ensuring that the force is transmitted evenly and directly, avoiding deformation deviation caused by lateral component force; and reducing the sliding friction pair between the lower pressure plate 231 and the flexible rubber membrane 211, and making the response of the lower pressure plate 231 to the action of the trigger rod 24 faster and more sensitive, improving the linkage efficiency between valve core rotation and flow channel deformation. Example 3

[0043] Reference Figures 9 to 10 The difference between this embodiment and Embodiment 1 lies in the structure and engagement of the lower pressure plate 231. The lower pressure plate 231 has a disc-shaped structure, and its outer circumferential surface is precisely slidably engaged with the inner wall of the operating cavity 23. A sealing ring is provided between the two to ensure sliding sealing. The lower pressure plate 231 divides the operating cavity 23 into an upper movable cavity 237 located above and a lower sealing cavity 238 located below. The six flexible rubber membranes 211 at the top of the flow channel 21 are all located within the range of the lower sealing cavity 238.

[0044] Reference Figures 9 to 10 When the pressure plate 231 overcomes the resistance of the compression spring 232 and moves down along the inner wall of the operating chamber 23, the volume of the lower sealing chamber 238 decreases accordingly, the gas inside the chamber is compressed, and the air pressure rises rapidly. According to Pascal's principle, this increased air pressure acts uniformly on each wall surface of the lower sealing chamber 238 in an isotropic manner, including the back surfaces of the six flexible rubber membranes 211. Driven by the uniform air pressure, the six flexible rubber membranes 211 synchronously deform into a regular hemispherical protrusion inside the flow channel 21. When the trigger rod 24 removes its force, the pressure plate 231 moves upward under the reset action of the elastic element, the volume of the lower sealing chamber 238 increases, the air pressure decreases, and the flexible part automatically returns to flatness under its own elasticity and the action of external fluid pressure. The entire reset process does not require additional power intervention, and the structure is simple and reliable. It should be noted that, in one embodiment, the lower sealing chamber 238 can also be filled with liquid.

[0045] The implementation principle of this embodiment is to achieve an integrated design of pneumatic drive. The lower pressure plate 231 itself acts as a piston, dividing the operating chamber 23 into an independent upper movable chamber 237 and a lower sealing chamber 238, with the flexible part located in the lower sealing chamber 238. When the trigger rod 24 is pushed downward by the turbulence triggering mechanism, the volume of the lower sealing chamber 238 is compressed, and the air pressure inside the chamber increases accordingly. The increased air pressure acts evenly on all walls of the lower sealing chamber 238, including the back of the flexible part, thereby directly driving the flexible part to deform into the flow channel 21. This design highly integrates the power transmission medium and the actuator, eliminating the need for an additional piston structure, and making the valve core... 2. The internal structure is more concise and compact. It should be noted that the sliding fit structure between the lower pressure plate 231 and the inner wall of the operating chamber 23 effectively isolates the upper moving chamber 237 and the lower sealing chamber 238, blocking the path of high-pressure fluid and slurry particles in the flow channel 21 to invade the guide hole 221 of the trigger rod 24 and the valve stem 22 area. Even if the flexible part has a small leakage after long-term use, the pressure change in the lower sealing chamber 238 can serve as an early warning signal, preventing the slurry from directly entering the moving mechanism and causing jamming. This significantly improves the reliability of the valve under harsh working conditions and can also buffer the water hammer effect in the pipeline.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of this application.

Claims

1. A three-way reversing ball valve, characterized in that, include: The valve body (1) has a valve cavity (13) formed in the middle, and the valve body (1) is provided with a main interface (121), a first auxiliary interface (111) and a second auxiliary interface (112) that communicate with the valve cavity (13). The valve core (2) is rotatably connected in the valve cavity (13), and the valve core (2) is provided with a flow channel (21) that allows fluid to pass through, and the wall of the flow channel (21) includes at least one flexible part that can undergo elastic deformation. A rotary drive mechanism (3) is fixed on the valve body (1) and is used to drive the valve core (2) to rotate and adjust the position of the internal flow channel (21) in the valve cavity (13) so that the two ends of the flow channel (21) can selectively connect with the main interface (121) and the first auxiliary interface (111) or the main interface (121) and the second auxiliary interface (112) as the valve core (2) rotates. The turbulence triggering mechanism is configured to apply a force to the flexible part in response to the rotational movement of the valve core (2), causing the flexible part to deform so that the local cross-sectional area of ​​the flow channel (21) is reduced or an inwardly protruding turbulence structure is formed when it is connected to the main interface (121) and the second sub-interface (112).

2. The three-way reversing ball valve according to claim 1, characterized in that, The valve core (2) has a valve stem (22) at its upper end and an operating cavity (23) is formed inside it. The operating cavity (23) is provided with a lower pressure plate (231) for pressing the flexible part and an elastic element for driving the lower pressure plate (231) away from the flexible part. The valve stem (22) is provided with an axial guide hole (221). The turbulence triggering mechanism includes a lower pressure assembly and a trigger rod (24) slidably connected in the guide hole (221). The lower pressure assembly can drive the trigger rod (24) to act on the lower pressure plate (231) during the rotation of the valve core (2), so that the lower pressure plate (231) overcomes the force of the elastic element and moves towards the flexible part, thereby causing the flexible part to deform.

3. The three-way reversing ball valve according to claim 2, characterized in that, The lower pressure plate (231) is fixed to the lower end of the trigger rod (24); the top of the operating cavity (23) is provided with a limiting cover (25), the trigger rod (24) passes through the limiting cover (25), and the outer wall of the trigger rod (24) is provided with a positioning protrusion ring (243); the elastic element is sleeved on the trigger rod (24) and placed between the limiting cover (25) and the positioning protrusion ring (243).

4. The three-way reversing ball valve according to claim 2, characterized in that, The lower pressure plate (231) is hinged to the inner wall of the operating cavity (23), and the back of the lower pressure plate (231) is provided with a guide groove (233); the end of the trigger rod (24) is provided with a pusher (241) slidably connected in the guide groove (233); the elastic element is a torsion spring (235) provided at the hinge of the lower pressure plate (231).

5. The three-way reversing ball valve according to claim 2, characterized in that, The pressing assembly includes a pin (114) fixed on the valve body (1) and an arc-shaped guide surface (242) on the trigger rod (24); the arc-shaped guide surface (242) can abut against the pin (114) under the action of the elastic element; a limit key (245) for limiting the rotation of the trigger rod (24) is provided between the trigger rod (24) and the guide hole (221).

6. The three-way reversing ball valve according to claim 5, characterized in that, The valve stem (22) has a slit limiting groove (222) on its middle side wall that communicates with the guide hole (221). The valve body (1) has a support rod (113) and a push pin (114) is mounted on the support rod (113). The push pin (114) abuts against the arc-shaped guide surface (242) in the slit limiting groove (222). The upper end of the valve stem (22) is connected to the rotary drive mechanism (3).

7. The three-way reversing ball valve according to claim 2, characterized in that, The flow channel (21) has several through holes on its side wall near the operating cavity (23), and the flexible part is a flexible rubber membrane (211) disposed in the through holes; the lower pressure plate (231) has several arc protrusions (234) that are adapted to the through holes; the arc protrusions (234) abut against the flexible rubber membrane (211) to provide support for the flexible rubber membrane (211).

8. The three-way reversing ball valve according to claim 7, characterized in that, The outer wall of the flow channel (21) is provided with an installation groove that is compatible with the flexible rubber membrane (211). A molding cap (212) is provided in the installation groove, and the flexible rubber membrane (211) is fixed in the accommodating space enclosed by the molding cap (212) and the installation groove.

9. The three-way reversing ball valve according to claim 2, characterized in that, The lower pressure plate (231) is adapted to the operating cavity (23) and is slidably connected to the inner wall of the operating cavity (23), dividing the operating cavity (23) into an upper movable cavity (237) and a lower sealing cavity (238). The flexible part is located in the lower sealing cavity (238). The lower pressure assembly can drive the trigger rod (24) to act on the lower pressure plate (231) during the rotation of the valve core (2), so that the lower pressure plate (231) overcomes the force of the elastic element and moves towards the flexible part, thereby increasing the air pressure in the lower sealing cavity (238) to drive the flexible part to deform.

10. The three-way reversing ball valve according to claim 1, characterized in that, The valve body (1) is assembled from an upper valve cover (11) and a lower valve seat (12), and the lower valve seat (12) has a conical structure; the main interface (121) is located on the lower valve seat (12), and the first secondary interface (111) and the second secondary interface (112) are located on the upper valve cover (11); at least two lugs (122) are evenly distributed on the side wall of the lower valve seat (12).

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