Flow channel parameter design method of immersed constant-flow blocking four-way valve, four-way valve and computer equipment

Abstract

The application relates to the fields of ship design, manufacture and simulation technology, and discloses a flow channel parameter design method of an immersed constant flow resistance four-way valve, the immersed constant flow resistance four-way valve and computer equipment. The design method comprises the following steps: determining flow channel structure parameter characteristics according to the structure of the immersed constant flow resistance four-way valve, wherein the flow channel structure parameter characteristics comprise fixed parameters and to-be-optimized parameters; presetting initial values of the to-be-optimized parameters according to constant flow resistance characteristics; establishing a geometric model of the immersed constant flow resistance four-way valve according to the initial values of the to-be-optimized parameters; performing flow field analysis by using fluid simulation software according to the parameterized model and preset environment parameters, and calculating flow resistances under various working conditions; and selecting different parameter values of the to-be-optimized parameters at step intervals for calculation until the flow resistances under various working conditions meet the constant flow resistance requirement. The application embodiment can save development time, improve design efficiency, simplify the design process and parameters, and is favorable for improving product reliability.

Description

Technical Field

[0001] This invention relates to the fields of ship design, manufacturing and simulation technology, and in particular to a method for designing flow channel parameters of an immersion constant flow resistance four-way valve, the four-way valve and computer equipment. Background Technology

[0002] For ships, especially large cargo ships, oil tankers, and research vessels, the precise management and control of their water tanks is crucial for navigational safety, maneuverability, stability, and energy efficiency. As an important component of water tank management, the valve system's design rationality, reliability, and ease of operation directly impact the ship's overall performance and operating costs.

[0003] Currently, shipboard water tank systems typically achieve basic functions such as water injection and drainage through valve systems, which generally include valves, pipelines, valve actuators, and control modules. In existing technologies, valve design results in inconsistent flow resistance at different opening degrees, causing significant impact on pipelines and negatively affecting the performance of other equipment. While CFD (Computational Fluid Dynamics) technology is mature for flow resistance design calculations, the valve structure itself in existing technologies is often insufficient to meet constant flow resistance requirements. Furthermore, it generally involves numerous structural characteristic parameters, requiring repeated calculations of multiple parameters to be optimized, sometimes without convergence, significantly increasing the development cycle and yielding unsatisfactory results, failing to meet constant flow resistance requirements. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a method for designing flow channel parameters of a constant flow resistance four-way valve, the constant flow resistance four-way valve itself, and a computer device. The embodiments of this application can save development time, improve design efficiency, and simplify the design process and parameters, thus contributing to improved product reliability. This invention is implemented using the following technical solution.

[0005] In some embodiments, a method for designing flow channel parameters of a submerged constant flow resistance four-way valve is provided. The method includes: determining flow channel structural parameter characteristics based on the structure of the submerged constant flow resistance four-way valve, wherein the flow channel structural parameter characteristics include fixed parameters and parameters to be optimized, wherein the fixed parameters include at least the height of each flow channel, and the parameters to be optimized include at least the width of each flow channel; preset initial values ​​for the parameters to be optimized based on the constant flow resistance characteristics; establishing a geometric model of the submerged constant flow resistance four-way valve based on the initial values ​​of the parameters to be optimized, wherein the geometric model is a parametric model; performing flow field analysis using fluid simulation software based on the parametric model and preset environmental parameters, and calculating the flow resistance under various operating conditions; and calculating the parameters to be optimized by selecting different parameter values ​​at step intervals until the flow resistance under each operating condition meets the constant flow resistance requirement.

[0006] In some embodiments, the submersible constant flow resistance four-way valve structure includes a valve core, the valve core having a first flow channel, a second flow channel and a third flow channel, the fixed parameters further including the valve core diameter D, the maximum thickness of the arc surface wall Wd, and the wall thickness of the middle flow channel Wz, and the parameters to be optimized including the center widths Wa, Wb and Wc of the first flow channel, the second flow channel and the third flow channel.

[0007] In some embodiments, the initial values ​​of the center width Wa of the first flow channel, the center width Wb of the second flow channel, and the center width Wc of the third flow channel are Wa0, Wb0, and Wc0, respectively; the initial value of the parameter to be optimized is preset to be: Wb0=Wa0 / 2=Wc0 / 2, where Wa0+Wb0+Wc0+2Wd+2Wz=D.

[0008] In some embodiments, the preset environmental parameters include fluid pressure and flow rate under various operating conditions, and each operating condition includes a first connection position, a cut-off position, a second connection position, a first flow rate adjustment position, and a second flow rate adjustment position.

[0009] In some embodiments, a submersible constant flow resistance four-way valve is provided, which is designed using the aforementioned flow channel parameter design method.

[0010] In some embodiments, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the aforementioned method.

[0011] Compared with the prior art, the beneficial effects of the present invention include, but are not limited to: the flow channel parameter design method of the present application involves fewer flow channel structure parameters, and by selecting the parameter values ​​of the parameters to be optimized in a step-by-step manner and simulating the working process of each model, it is not necessary to repeatedly calculate and verify for the same model. The embodiments of the present application can save development time, improve design efficiency, and simplify the design process and parameters, which is conducive to improving product reliability. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the submersible constant flow resistance four-way valve according to an embodiment of the present invention.

[0013] Figure 2 This is a schematic diagram of the drive module and mounting base according to an embodiment of the present invention.

[0014] Figure 3 This is a schematic diagram of the control logic of the hydraulic gear drive mechanism, control valve group, and control unit according to an embodiment of the present invention.

[0015] Figure 4 This is a schematic diagram of the mounting base according to an embodiment of the present invention.

[0016] Figure 5 This is a schematic diagram of the valve seat according to an embodiment of the present invention.

[0017] Figure 6 This is a schematic diagram of the valve core according to an embodiment of the present invention.

[0018] Figure 7 This is a schematic diagram of the side valve body according to an embodiment of the present invention.

[0019] Figure 8 This is an embodiment of the present invention. Figure 7 Exploded view.

[0020] Figure 9 This is a cross-sectional view of the circulation device according to an embodiment of the present invention.

[0021] Figure 10 This is a schematic diagram of the working state of the flow device in the first connection position according to an embodiment of the present invention.

[0022] Figure 11 This is a schematic diagram of the working state of the flow device in the first flow regulation position according to an embodiment of the present invention.

[0023] Figure 12 This is a schematic diagram of the working state of the flow device in the cut-off position according to an embodiment of the present invention.

[0024] Figure 13 This is a schematic diagram of the working state of the flow device in the second flow adjustment position according to an embodiment of the present invention.

[0025] Figure 14 This is a schematic diagram of the working state of the flow device in the second connection position according to an embodiment of the present invention.

[0026] Figure 15 This is a cross-sectional view of the distribution shaft according to an embodiment of the present invention.

[0027] Figure 16 This is a logic diagram of the flow channel structure parameter design method according to an embodiment of the present invention.

[0028] Figure 17 This is one of the flow channel simulation analysis diagrams in an embodiment of the present invention.

[0029] Figure 18 This is the second simulation analysis diagram of the flow channel in an embodiment of the present invention.

[0030] Figure 19 This is the third flow channel simulation analysis diagram of an embodiment of the present invention.

[0031] Figure 20 This is the fourth flow channel simulation analysis diagram of an embodiment of the present invention.

[0032] Figure 21 This is a schematic diagram of the water tank system structure according to an embodiment of the present invention.

[0033] Figure 22 This is a schematic diagram of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0034] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0035] Please see Figures 1 to 4 In some embodiments, a submersible constant flow resistance four-way valve 100 is provided, including a mounting base 40, a flow device 30, and a drive module. The mounting base 40 is detachably connected to a mounting port on the top of a water tank 60 of a ship via fasteners (e.g., screws, bolt assemblies, bolts, etc.) and closes the mounting port. The flow device 30 is disposed on the bottom surface of the mounting base 40, located inside the water tank 60, and can be submerged in fluid to allow fluid to pass through. The drive module is disposed on the top surface of the mounting base 40 and is used to drive the flow device 30 to change its operating mode. In this embodiment, the flow device 30 and the drive module are integrated on the mounting base 40, resulting in a compact overall structure that occupies less installation space. When the overall structure needs to be disassembled, it is only necessary to remove the mounting base 40 from the top of the water tank 60 and then install the mounting base 40 on the top of the water tank 60, simplifying the disassembly and assembly process.

[0036] In some embodiments, the flow device 30 includes a valve seat 31 and a valve core 32. The valve seat 31 has a valve cavity 312, and the valve core 32 is rotatably disposed within the valve cavity 312 of the valve seat 31.

[0037] In some embodiments, the drive module includes a control device 20 and a drive device 10. The drive device 10 is connected to the valve core 32, and the control device 20 is configured to control the drive device 10 to drive the valve core 32 to rotate. When the valve core 32 rotates within the valve cavity 312 of the valve seat 31, the valve position of the submerged constant flow resistance four-way valve 100 can be changed, thereby changing the operating mode. The valve seat 31, valve core 32, control device 20, and drive device 10 are all integrated on the mounting base 40, which maintains a high degree of structural compactness while taking into account control and drive functions.

[0038] In some embodiments, the bottom surface of the mounting base 40 is provided with a downwardly extending connector, which is integrally formed with the mounting base 40. The connector is generally tapered, wider at the top and narrower at the bottom, and its bottom is connected to the valve seat 31. During installation, the connector enters the mounting port from top to bottom. In the early stage of the entry process, the lower end of the connector is narrower, allowing it to easily enter the mounting port. When the bottom surface of the mounting base abuts against the top surface of the water tank 60, the upper periphery of the connector abuts against the inner wall of the mounting port, positioning the connector through the mounting port, thereby positioning the mounting base 40 and preventing the mounting base 40 from shaking and interfering with the subsequent process of fastening the mounting base 40 to the top of the water tank 60 with fasteners.

[0039] In some embodiments, the connector includes a connecting post 41 and a reinforcing rib 42. The top end of the connecting post 41 is connected to the bottom surface of the mounting base 40, and the bottom end is connected to the valve seat 31. The reinforcing rib 42 is generally triangular and connects the bottom surface of the mounting base 40 to the circumferential sidewall of the connecting post 41 to enhance the structural strength of the mounting base 40. After the mounting base 40 is connected to the top of the water tank 60, the bottom end of the connecting post 41 is spaced from the top wall inside the water tank 60, and the valve seat 31 is connected to the bottom end of the connecting post 41. Therefore, the valve seat 31 is spaced from the top wall inside the water tank 60, allowing the valve seat 31 to be fully submerged in the fluid contained in the water tank 60.

[0040] In some embodiments, the drive device 10 includes a hydraulic gear drive mechanism 11 and a control valve assembly 12. The output end of the hydraulic gear drive mechanism 11 is connected to the upper end of the valve core 32. The hydraulic gear drive mechanism 11 is connected to a pressure oil source 125 through the control valve assembly 12. The pressure oil from the pressure oil source 125 is delivered to the hydraulic gear drive mechanism 11 through the control valve assembly 12, thereby driving the output end of the hydraulic gear drive mechanism 11 to rotate the valve core 32. The control device 20 is electrically connected to the control valve assembly 12. The control device 20 can send control commands to the control valve assembly 12. Based on the control commands, the control valve assembly 12 changes parameters such as the direction and flow rate of the pressure oil delivered to the hydraulic gear drive mechanism 11, so that the hydraulic gear mechanism drives the valve core 32 to achieve working effects such as forward rotation, reverse rotation, stop rotation, accelerated rotation, decelerated rotation, increased rotational torque, and decreased rotational torque.

[0041] Please combine Figure 2 and Figure 3 In some embodiments, the hydraulic gear drive mechanism 11 includes a mounting housing 112, gears 114, two racks 113, and four hydraulic cylinders 111. The mounting housing 112 has a box-like structure with a connecting plate at its bottom. The connecting plate is integrally formed with the mounting housing 112, and its bottom is attached to the top surface of the mounting base 40. It is also fixed to the top surface of the mounting base 40 by a set of fasteners surrounding the mounting housing 112, ensuring reliable connection.

[0042] In some embodiments, gear 114 constitutes the power output end of hydraulic gear drive mechanism 11, rotatably disposed inside mounting housing 112, and fixedly connected to the upper end of valve core 32. Specifically, the shaft of gear 114 is a hollow cylindrical structure, with its top and bottom ends rotatably connected to the top and bottom walls of mounting housing 112, respectively. In some embodiments, the top and bottom ends of the shaft are rotatably mounted on mounting housing 112 via bearings. The bottom end of the shaft of gear 114 is connected to valve core 32. Specifically, the upper end of valve core 32 is inserted into the bottom end of the shaft of gear 114. A locking key can be provided at the upper end of valve core 32, and a locking groove can be provided at the bottom end of the shaft of gear 114. When the upper end of valve core 32 is inserted into the bottom end of the shaft of gear 114, the locking key engages with the locking groove, thereby enabling valve core 32 and gear 114 to rotate synchronously. Of course, in other embodiments, the shaft of gear 114 and valve core 32 can be connected in other ways, as long as they can rotate synchronously. For example, they can also be connected by a coupling.

[0043] In some embodiments, two racks 113 are disposed inside the mounting housing in a linear reciprocating motion, symmetrically arranged on both sides of the gear 114, and mesh with both sides of the gear 114.

[0044] In some embodiments, each hydraulic cylinder 111 includes a cylinder body and a piston rod, with the piston rod forming the output end of the hydraulic cylinder 111. The cylinder bodies of the four hydraulic cylinders 111 are symmetrically arranged on opposite sides of the mounting housing. The piston rods of the four hydraulic cylinders 111 are all capable of linear extension and retraction, penetrating the mounting housing and extending into the interior of the mounting housing, correspondingly and fixedly to the two ends of the two racks 113. The oil ports of the four hydraulic cylinders 111 are connected to the control valve assembly 12. In some embodiments, two hydraulic cylinders 111 are arranged opposite each other along the same axis, and the rack 113 is integrally formed with the piston rods of the corresponding two hydraulic cylinders 111. In the embodiments of this application, the integral forming of the rack 113 with the piston rods of the corresponding two hydraulic cylinders 111 ensures the stability of the movement and high control precision.

[0045] In one application scenario of this embodiment, the pressure oil provided by the pressure oil source 125 selectively enters the oil port of one or more hydraulic cylinders 111 through the control valve group 12, causing the piston rod of the corresponding hydraulic cylinder 111 to extend and retract, thereby driving the two racks 113 to make linear movements in opposite directions at the same time. The two racks 113 drive the gear 114 to rotate in both directions, and the shaft of the gear 114 drives the valve core 32 to rotate in both directions.

[0046] In the embodiments of this application, four hydraulic cylinders 111 drive two racks 113 to synchronously drive gears 114, so that gears 114 obtain sufficient torque to drive valve core 32, enabling valve core 32 to rotate normally and accurately even in high-pressure, high-load working environments. Furthermore, the method of using racks 113 to drive gears 114 makes the rotation process of gears 114 more precise and reliable, thereby enabling gears 114 to drive valve core 32 to rotate accurately and reliably, improving the accuracy and reliability of the submersible constant flow four-way valve's valve position switching.

[0047] In another application scenario of this embodiment, when it is necessary to disassemble the hydraulic gear drive mechanism 11, simply remove the fasteners on the connecting plate to remove the entire hydraulic gear drive mechanism 11 from the mounting base 40 for easy replacement and maintenance.

[0048] In some embodiments, the control valve assembly 12 includes a bracket 121, an electro-hydraulic directional valve 122, two hydraulically controlled check valves 123, and two one-way throttle valves 124. The bracket 121 can be a cuboid structure, which is detachably connected to the top surface of the mounting base 40 by fasteners. The electro-hydraulic directional valve 122, the two hydraulically controlled check valves 123, and the two one-way throttle valves 124 are disposed on the bracket 121. Through the connecting effect of the bracket 121, the control valve assembly 12 is integrated, which improves the compactness of the control valve assembly 12 and reduces its installation space. On the other hand, the control valve assembly 12 can be disassembled and assembled as a whole, greatly simplifying the disassembly and assembly process.

[0049] Furthermore, the electro-hydraulic directional valve 122 is fixedly attached to the bracket 121. In some embodiments, the bracket 121 may also be formed by the housing of the electro-hydraulic directional valve 122. The electro-hydraulic directional valve 122 is electrically connected to the control device 20. Specifically, the electro-hydraulic directional valve 122 has a control unit 1222 and a directional valve body 1221.

[0050] Two hydraulically controlled check valves 123 are connected to the two working ports of the electro-hydraulic directional valve 122, respectively. The two hydraulically controlled check valves 123 are respectively connected between the one-way throttle valve 124 and the two chambers of the hydraulic cylinder 111. The pressure oil source 125 is connected to the pressure oil input port of the electro-hydraulic directional valve 122 through a pipeline.

[0051] During operation, pressurized oil from pressure oil source 125 flows into electro-hydraulic directional valve 122. Under the control of control unit 1222, the pressurized oil selectively flows out from one of the two working ports and sequentially passes through the corresponding hydraulic control check valve 123 and one-way throttle valve 124, finally flowing into the corresponding hydraulic cylinder 111. Hydraulic cylinder 111 drives the corresponding rack 113 to move forward. When pressurized oil flows out from the other of the two working ports, the pressurized oil finally flows to the other corresponding hydraulic cylinder 111, which drives the corresponding rack 113 to move in the opposite direction.

[0052] In some embodiments, the drive module further includes an angle feedback device 13. The angle feedback device 13 is configured to detect the relative position of the valve core 32 and the valve seat 31, and to feed back an angle signal about the relative position of the valve seat 31 and the valve core 32 to the control device 20; the control device 20 can control the drive device 10 to drive the valve core 32 to rotate based on the angle signal, thereby improving the accuracy of the rotation angle of the valve core 32.

[0053] In some embodiments, the angle feedback device 13 includes a rotary potentiometer. The rotary potentiometer is disposed on the mounting housing 112. One of the gear 114 and the valve core 32 is drivenly connected to the rotating shaft of the rotary potentiometer. Specifically, the housing of the rotary potentiometer is fixed to the top of the mounting housing 112 by fasteners, its rotating shaft coincides with the axis of the gear 114 rotating shaft, and is inserted into the top end of the gear 114 rotating shaft. The rotating shaft and the gear 114 rotating shaft are synchronously rotated by a key and slot connection. A pointer is also connected to the top end of the rotating shaft, and the top of the housing of the rotary potentiometer is provided with a scale corresponding to the pointer. The scale is divided into a drainage scale area, a water filling scale area, and a self-circulation scale area. When the gear 114 rotating shaft drives the rotating shaft of the rotary potentiometer and the valve core 32 to rotate synchronously, the rotating shaft drives the pointer to rotate. The operator judges the angle of rotation of the valve core 32 and its working position after rotation by the relative position of the pointer and the scale.

[0054] In some embodiments, the control device 20 is located on the side of the hydraulic gear drive mechanism 11 facing away from the control valve assembly 12, and includes a housing 21, a control unit 26, and multiple terminals. The housing 21 is fixed to the mounting base 40 by fasteners, and its top surface has a door that can be opened and closed. The control unit 26 is located inside the housing 21 and includes a circuit board and a control chip module, two signal conditioning and A / D conversion modules, and an isolation drive module integrated on the circuit board. The control chip module can be a miniature processor such as an MCU processor or a microcontroller. The two signal conditioning and A / D conversion modules and the isolation drive module are all independently and electrically connected to the control chip module.

[0055] Each terminal is located on the side wall of the enclosure 21 and is electrically connected to the control unit 26 via wires, which are located inside the enclosure 21. The enclosure 21 protects the wires and control unit 26 from external environmental interference, reducing the failure rate. Furthermore, the control unit 26, terminals, and wires are all integrated into the enclosure 21, resulting in a highly compact structure.

[0056] Furthermore, the multiple terminals include a power terminal 23, a control valve terminal 22, an angle feedback terminal 24, and a control signal terminal 25. The control chip module is preferably a microcontroller. The power terminal 23 is used to electrically connect to an external power supply and the circuit board of the control unit 26. The control valve terminal 22 is used to electrically connect to the electro-hydraulic directional valve 122 and the isolation drive module. The angle feedback terminal 24 is used to electrically connect to the terminal of the rotary potentiometer and one of the two signal conditioning and A / D conversion modules. The control signal terminal 25 is used to electrically connect to the remote control terminal and the other of the two signal conditioning and A / D conversion modules.

[0057] In some embodiments, one end of the angle feedback device 13 is electrically connected to the control device 20, and the other end is connected to the gear 114. The gear 114 and the rack 113 are directly mechanically meshed. The rack 113 is integrally formed with the piston rod. The piston displacement at both ends of the piston rod is directly related to the pressure and flow rate of the hydraulic cylinder. In the embodiments of this application, the control device 20 is electrically connected to the electro-hydraulic directional valve 122. The electro-hydraulic directional valve 122 is a servo valve, which can accurately control the pressure and flow rate of the hydraulic cylinder based on the feedback from the angle feedback device 13. Furthermore, it optimizes the algorithm for situations with high inertia under heavy loads to achieve high-precision valve position control.

[0058] Please combine Figure 1 as well as Figures 5 to 9 In some embodiments, the valve seat 31 has a valve cavity 312. The valve cavity 312 has four valve ports. The valve core 32 has three flow channels and two sealing walls. When the drive module drives the valve core 32 to rotate, the ports of the flow channels can connect and disconnect with the valve ports. When the valve port is connected to the port of the flow channel, the valve port is in an operating state; when the valve port is disconnected from the port of the flow channel, the valve port is in a non-operating state. The ports of the three flow channels on the valve core 32 have the same shape and size.

[0059] The valve seat 31 has a split structure, comprising a main valve body 311 and four side valve bodies 33. The four side valve bodies 33 are detachably connected to the main valve body 311 and are arranged around the main valve body 311. Four valve ports are sequentially opened on the four side valve bodies 33. The four valve ports on the side valve bodies 33 have the same shape and size, and the shape of the side of each valve port away from the port is circular. Each side valve body has a sealing assembly 34 between itself and the valve core, and the sealing assembly is embedded in the side of the valve port near the flow channel. The shape of the port, the shape of the side of the valve port near the port, and the shape and size of the opening of the sealing assembly 34 are all the same, so that the sealing assembly 34 can completely abut against the edge of the valve port and the port.

[0060] In some embodiments, the shape of the port, the shape of the valve port near the port, and the shape of the opening of the sealing assembly are all rectangular. In the embodiments of this application, the rectangle facilitates processing and manufacturing, and can also increase the reliability of the contact between the sealing assembly and the port / valve port, thereby increasing the sealing performance.

[0061] When the two ends of the flow channel are connected to and aligned with two of the four valve ports, the ports of the flow channel abut against the sealing components 34 of the corresponding valve ports (e.g., Figure 9 As shown, the sealing assembly 34 seals the portion of the flow channel port that connects with the valve port, preventing large-scale fluid leakage. When the valve port is not in operation, the sealing wall abuts against the sealing assembly 34 of the valve port to close the corresponding valve port, preventing fluid from entering the valve port and causing cross-flow between different valve positions.

[0062] In some embodiments, the main valve body 311 is a hollow structure with four side notches. The four side notches penetrate the inner cavity of the main valve body 311 and are evenly spaced around the circumference of the main valve body 311. Each side valve body 33 is connected to the side of the main valve body 311 by fasteners and is also evenly spaced around the main valve body 311, with each of the four side valve bodies 33 correspondingly closing one of the four side notches of the main valve body 311. The valve cavity 312 is formed by the main valve body 311 and each of the side valve bodies 33.

[0063] In some embodiments, a sealing ring is provided between the side valve body 33 and the main valve body 311 to improve the sealing performance between the side valve body 33 and the main valve body 311.

[0064] In some embodiments, the port of the valve orifice closest to the valve core is the inner port, and the port facing away from the valve core is the outer port. The inner port of the valve orifice is rectangular, its shape adapted to the flow channel port for docking. The outer port of the valve orifice is circular, its shape adapted to the pipe for connection. The length of the inner port is greater than the diameter of the outer port, and the width is smaller than the diameter of the outer port. The inner wall of the valve orifice includes a top wall, a bottom wall, and two side walls. The top wall and the bottom wall extend arcuately from the edge of the inner port to the edge of the outer port, and they gradually approach each other. The two side walls extend arcuately from the edge of the inner port to the edge of the outer port, and they gradually move away from each other. In the embodiments of this application, the special shape design of the valve orifice ensures matching with the pipe and valve core ports, reduces flow resistance and facilitates optimization of constant flow resistance design, and also ensures reliable sealing.

[0065] In some embodiments, the main valve body 311 further includes a top cover plate 36 and a bottom cover plate. The top and bottom of the main valve body 311 are respectively provided with a top notch and a bottom notch, which are aligned. The top cover plate 36 and the bottom cover plate are respectively fastened to the top and bottom of the main valve body 311 by fasteners to close the top and bottom notches of the main valve body 311. A sealing ring is provided between the top cover plate 36 and the main valve body 311, and a sealing ring is provided between the bottom cover plate and the main valve body 311. The valve cavity 312 is defined by the main valve body 311, the side valve body 33, the top cover plate 36, and the bottom cover plate.

[0066] In some embodiments, the connecting column 41 has a hollow structure, with its top end fixed to the bottom surface of the mounting base 40 and its bottom end fixed to the main valve body 311. Specifically, the top cover plate 36 has an assembly hole, and the bottom end of the connecting column 41 is fixed to the edge of the assembly hole by fasteners. A sealing ring is provided between the bottom end of the connecting column 41 and the top cover plate 36. The upper end of the valve core 32 passes through the assembly hole, the inner cavity of the connecting column 41, the mounting base 40, and the mounting shell 112 in sequence, and is finally connected to the rotating shaft of the gear 114. The lower end of the valve core 32 is rotatably connected to the inner wall of the bottom cover plate.

[0067] In some embodiments, the sealing assembly 34 is disposed around the valve port and includes an annular sealing seat 341 and an annular sealing element 342. The annular sealing seat 341 conforms to the edge of the valve port and is fixed to the edge of the valve port by fasteners. The annular sealing element 342 is disposed on the inner ring of the annular sealing seat 341 and conforms to the inner ring wall of the annular sealing seat 341. When the flow channel port is aligned with the corresponding valve port, the port of the flow channel abuts against the corresponding annular sealing element 342, and the annular sealing element 342 seals the portion where the flow channel port and the valve port meet. When the valve port is in a non-open state, the sealing wall abuts against the annular sealing element 342 of the valve port, and the sealing wall and the annular sealing element 342 together seal the valve port.

[0068] In some embodiments, the annular seal 342 is a flexible soft sealing ring, such as a rubber sealing ring or a silicone sealing ring. When the flow channel port abuts against the annular seal 342, the annular seal 342 is compressed to cause elastic deformation. Under the elastic force of the deformation of the annular seal 342, a pre-tightening force is formed between the annular seal 342 and the flow channel port, improving the tightness of the fit between the flow channel port and the annular seal 342, thereby improving the sealing performance. When the sealing wall abuts against the annular seal 342, the annular seal 342 is compressed to cause elastic deformation. Under the elastic force of the deformation of the annular seal 342, a pre-tightening force is formed between the annular seal 342 and the sealing wall, improving the tightness of the fit between the flow channel port and the sealing wall, thereby improving the sealing performance.

[0069] In some embodiments, the valve core is cylindrical. The port of the flow channel penetrates the circumferential sidewall of the valve core 32 and is an arc-shaped port. The two sealing walls are two symmetrically arranged arc-shaped walls 324 on the circumferential sidewall of the valve core 32. The annular seal 342 has an arc-shaped surface 3421 on the side facing away from the valve port. The arc-shaped surface 3421 surrounds the inner ring of the annular seal 342. Since the port of the flow channel is an arc-shaped port and the sealing wall is an arc-shaped wall 324, the arc-shaped surface 3421 can fit more tightly against the port edge of the flow channel and the sealing wall, thereby improving the sealing performance.

[0070] In some embodiments, a first annular recess 332 is provided around the valve port, and an annular sealing seat 341 is disposed on the first annular recess 332, conforming to the inner wall of the first annular recess 332, and fixed to the inner wall of the first annular recess 332 by fasteners. A second annular recess 3411 is provided on the side of the inner ring wall of the annular sealing seat 341 facing away from the valve port, and an annular sealing member 342 is disposed on the second annular recess 3411, conforming to the inner wall of the second annular recess 3411, and fixed to the inner wall of the second annular recess 3411 by fasteners.

[0071] In some embodiments, the inner ring wall of the annular sealing seat 341 is aligned with the inner wall of the valve port on the side facing the valve port, and the inner ring wall of the annular seal 342 is aligned with the inner wall of the valve port to reduce the flow resistance to the fluid.

[0072] In some embodiments, when the valve core 32 rotates, the arcuate wall 324 abuts against at least one valve sealing assembly 34 and slides along the surface of the sealing assembly 34.

[0073] Please combine Figure 6 and Figure 9 In some embodiments, the number of flow channels is three, including a first flow channel 321, a second flow channel 322, and a third flow channel 323.

[0074] The four valve ports include a first valve port 351, a second valve port 352, a third valve port 353, and a fourth valve port 354 arranged sequentially along the circumference of the valve cavity 312. The first valve port 351 is connected to the outside of the water tank 60 via a pipe, the third valve port 353 is connected to the inside of the water tank 60, and the second valve port 352 and the fourth valve port 354 are respectively connected to the inlet and outlet of the pump 51 of the self-circulating working pipeline 50. The lower end of the valve core 32 is rotatably disposed in the valve cavity 312, and the drive module can drive the valve core 32 to rotate sequentially to the first connecting position, the first flow regulating position, the shut-off position, the second flow regulating position, and the second connecting position.

[0075] Please combine Figures 10 to 14In the diagram, ports A, B, C, and D represent the first valve port 351, the second valve port 352, the third valve port 353, and the fourth valve port 354, respectively. The submersible constant flow resistance four-way valve 100 has at least five valve positions, corresponding to five operating states. The five operating states are explained in detail below.

[0076] 1. Drainage operation status. For example... Figure 10 As shown, when valve core 32 is in the first connected position, the valve core angle is at 0°. Ports A and D are connected through the first flow channel 321, and ports B and C are connected through the third flow channel 323. Both ends of the second flow channel 322 are closed. The fluid in the water tank 60 flows sequentially through port C, the third flow channel 323, the self-circulating working pipe 50, port D, the first flow channel 321, and port A, and finally flows out of the water tank 60 through the pipe connected to port A, thus draining the water tank 60. The drainage flow rate is at its maximum during the drainage operation.

[0077] 2. Drainage adjustment working state. When gear 114 drives valve core 32 to rotate clockwise from the first connecting position, with a rotation angle within the range of 0° to 45°, valve core 32 is in the first flow adjustment position. For example... Figure 11 As shown, ports A and D are connected via the first flow channel 321, ports B and C are connected via the third flow channel 323, and ports B and D are connected via the second flow channel 322. The fluid inside the water tank 60 flows sequentially through port C, the third flow channel 323, the self-circulating working pipe 50, port D, the first flow channel 321, and port A, finally exiting the water tank 60 through the pipe connected to port A, thus draining the water tank 60. Simultaneously, some fluid within the self-circulating working pipe 50 also flows back to port B and the self-circulating working pipe 50 via port D and the second flow channel 322.

[0078] Valve core 32 clockwise ( Figure 11 The larger the rotation angle, the larger the area of ​​the second flow channel 322 connecting port D and port B, the larger the amount of fluid returning, and the smaller the amount of fluid discharged along port D, the first flow channel 321, and port A. By controlling the rotation angle of the valve core 32, the amount of fluid returning can be adjusted, thereby adjusting the drainage speed of the water tank 60.

[0079] As the rotation angle of the valve core 32 increases, the openings of the first flow channel 321 and the third flow channel 323 decrease, increasing the flow resistance. Correspondingly, the opening of the second flow channel 322 increases, creating a backflow effect, thereby reducing the flow resistance and offsetting the increase in flow resistance caused by the change in the openings of the first flow channel 321 and the third flow channel 323. Therefore, when the valve core 32 rotates from the first connecting position to the first flow regulating position, the overall flow resistance of the submerged constant flow resistance four-way valve 100 remains essentially constant. Furthermore, the opening of the second flow channel 322 is inversely proportional to the openings of the first flow channel 321 and the third flow channel 323. When the valve core 32 reciprocates within the range of 0° to 45°, the overall flow resistance of the submerged constant flow resistance four-way valve 100 remains essentially constant.

[0080] 3. Self-circulating operating state. When valve core 32 rotates 45° clockwise from the first connected position, valve core 32 is in the closed position. For example... Figure 12 As shown, ports B and D are connected through the second flow channel 322, while both ends of the first flow channel 321 and the third flow channel 323 are closed. The two arc-shaped walls 324 abut against ports A and C respectively, causing ports A and C to close. The fluid circulates within the self-circulating working pipe 50, port D, the second flow channel 322, and port B, and the submerged constant flow resistance four-way valve 100 is in a self-circulating working state.

[0081] 4. Water injection adjustment working state. When valve core 32 rotates clockwise from the first connecting position, with a rotation angle within the range of 45° to 90°, valve core 32 is in the second flow adjustment position. For example... Figure 13 As shown, ports A and B are connected through the first flow channel 321, ports B and D are connected through the second flow channel 322, and ports C and D are connected through the third flow channel 323. Fluid outside the water tank 60 flows sequentially through port A, the first flow channel 321, port B, the self-circulating working pipe 50, port D, the third flow channel 323, and port C, ultimately entering the water tank 60 to achieve water injection into the water tank 60.

[0082] Meanwhile, some of the fluid in the self-circulating working pipeline 50 also flows back into the self-circulating working pipeline 50 through port D, the second flow channel 322, and port B.

[0083] The principle of water injection regulation is similar to that of drainage regulation, and the principle of keeping the water injection flow resistance constant is also similar to that of keeping the drainage flow resistance constant. Therefore, the principles of water injection regulation and keeping the water injection flow resistance constant will not be elaborated here.

[0084] 5. Water filling operation. When valve core 32 rotates 90° clockwise from the first connecting position, valve core 32 is in the second connecting position. For example... Figure 14As shown, ports A and B are connected via the first flow channel 321, and ports C and D are connected via the third flow channel 323. Both ends of the second flow channel 322 are closed. Fluid outside the water tank 60 flows sequentially through port A, the first flow channel 321, port B, the self-circulating working pipe 50, port D, the third flow channel 323, and port C, ultimately entering the water tank 60 to fill it with water. The water injection flow rate is at its maximum during the water injection operation.

[0085] In this embodiment, by rotating the valve core 32, the submersible constant flow resistance four-way valve 100 switches its valve position, thereby switching between drainage operation mode, drainage regulation operation mode, self-circulation operation mode, water injection regulation operation mode and water injection operation mode. This can not only meet the multi-condition requirements of the water tank system, but also maintain constant flow resistance to the greatest extent during the switching of operation modes.

[0086] The self-circulating working pipeline 50 is an important component of the water tank system. During operation, the pump 51 on the self-circulating working pipeline 50 is always at a high-efficiency operating point and is in a continuous running state. During system operation, the flow resistance of the submerged constant flow resistance four-way valve 100 may change accordingly with the valve position. In the embodiments of this application, the flow resistance of the submerged constant flow resistance four-way valve 100 can be kept basically constant with the change of valve position through the design of the self-circulating working pipeline and the flow channel structure, so that the pump 51 can work stably.

[0087] Please combine Figure 8 , Figure 9 In some embodiments, the ports of the first flow channel 321, the second flow channel 322, the third flow channel 323, the first valve port 351, the second valve port 352, the third valve port 353, and the fourth valve port 354 are all identical in shape and size. When the valve core 32 is in the first connected position, the edges of the two ports of the first flow channel 321 are aligned with the edges of the first valve port 351 and the fourth valve port 354, respectively, and the edges of the two ports of the third flow channel 323 are aligned with the edges of the second valve port 352 and the third valve port 353, respectively, to avoid increasing flow resistance. When the valve core 32 is in the closed position, the edges of the two ports of the second flow channel 322 are aligned with the edges of the second valve port 352 and the fourth valve port 354, respectively, to avoid increasing flow resistance. When the valve core 32 is in the second connected position, the edges of the two ports of the first flow channel 321 are aligned with the edges of the first valve port 351 and the second valve port 352, respectively, and the edges of the two ports of the third flow channel 323 are aligned with the edges of the third valve port 353 and the fourth valve port 354, respectively, to avoid increasing flow resistance.

[0088] In some embodiments, the valve core 32 has a distribution shaft 320, and a first flow channel 321, a second flow channel 322, and a third flow channel 323 are all located on the distribution shaft 320. The shapes of the first flow channel 321, the second flow channel 322, and the third flow channel 323 in the cross-section of the distribution shaft 320 are centrally symmetrical. The cross-section of the distribution shaft 320 can be understood as the section formed by taking a sectional view of the distribution shaft 320 along a direction perpendicular to its axis.

[0089] In some embodiments, the distribution shaft 320 is cylindrical with a circumferential sidewall on its outer side. The two ports of the first flow channel 321, the two ports of the second flow channel 322, and the two ports of the third flow channel 323 all penetrate the circumferential sidewall of the distribution shaft 320, so that the two ports of the first flow channel 321, the two ports of the second flow channel 322, and the two ports of the third flow channel 323 are all arc-shaped openings. During the rotation of the valve core, the arc-shaped openings can more easily and dynamically fit tightly with the valve port or the sealing member on the valve port, so that the valve core can also have good sealing performance with the valve port during the rotation.

[0090] The circumferential sidewall of the distribution shaft 320 is sequentially divided into a first region, a second region, a third region, a fourth region, a fifth region, a sixth region, and an eighth region along the circumferential direction. The first flow channel 321 and the third flow channel 323 are located on either side of the second flow channel 322. The two ports of the first flow channel 321 are located in the first region and the seventh region, respectively; the two ports of the second flow channel 322 are located in the second region and the sixth region, respectively; and the two ports of the third flow channel 323 are located in the third region and the fifth region, respectively. The structure in this embodiment allows each flow channel port to communicate with the corresponding valve port when the valve core 32 rotates to its respective working position.

[0091] In some embodiments, the areas of the first, second, third, fourth, fifth, sixth, seventh, and eighth regions are the same, resulting in the circumferential sidewall of the distribution shaft 320 having an overall eight-part structure. Each time the submerged constant flow resistance four-way valve 100 switches between adjacent valve positions, the valve core drives the distribution shaft 320 to rotate by the same angle. In the embodiments of this application, the valve position change process of the submerged constant flow resistance four-way valve 100 can be precisely monitored by monitoring the valve core rotation angle, making the valve position switching process of the submerged constant flow resistance four-way valve 100 more precise and controllable.

[0092] In some embodiments, the first flow channel 321 and the third flow channel 323 are symmetrically located on both sides of the second flow channel 322, with the second flow channel 322 extending radially along the distribution shaft 320. The first flow channel 321 and the third flow channel 323 are C-shaped symmetrical structures arranged back-to-back. The flow directions at both ends of the first flow channel 321 are perpendicular, and the flow directions at both ends of the third flow channel 323 are also perpendicular. Based on the structure in this embodiment, where the circumferential sidewall of the distribution shaft 320 is divided into eight equal parts and the ports of the three flow channels correspond to the corresponding areas of the circumferential sidewall of the distribution shaft 320, it is relatively easy to design three flow channels simultaneously within the limited internal space of the distribution shaft 320.

[0093] The distribution shaft 320 has two symmetrically arranged arc-shaped walls 324, namely a first arc-shaped wall 324a and a second arc-shaped wall 324b; the first arc-shaped wall 324a and the second arc-shaped wall 324b constitute two sealing walls. The outer surfaces of the first arc-shaped wall 324a and the second arc-shaped wall 324b are arc surfaces, which are part of the circumferential sidewalls. The arc surface of the first arc-shaped wall 324a covers the eighth region, and the arc surface of the second arc-shaped wall 324b covers the fourth region. The two ports of the first flow channel 321, the two ports of the second flow channel 322, and the two ports of the third flow channel 323 are located on both sides of the line connecting the first arc-shaped wall 324a and the second arc-shaped wall 324b, respectively. When the valve core 32 is in the shut-off position, the first arc-shaped wall 324a and the second arc-shaped wall 324b are aligned and seal the first valve port 351 and the third valve port 353, preventing fluid from entering the first valve port 351 and the third valve port 353 and causing cross-flow in the valve position.

[0094] In some embodiments, the two ports of the first flow channel 321, the two ports of the second flow channel 322, and the two ports of the third flow channel 323 have the same shape and size, and the flow resistance when the fluid flows through each port is approximately the same. This is beneficial to improving the constant flow resistance of the submerged constant flow resistance four-way valve 100, and also beneficial to achieving sealing and reliability.

[0095] In some embodiments, the cross-sections of the first flow channel 321, the second flow channel 322, and the third flow channel 323 along their respective flow directions are all rectangular, which facilitates processing and manufacturing, reduces design and manufacturing costs, and is also beneficial for sealing structure design, ensuring sealing reliability.

[0096] The third flow channel 323 and the first flow channel 321 have the same shape and size. With a symmetrical design, under the premise that the fluid parameters such as flow velocity and fluid viscosity are the same, the flow resistance of the fluid flowing through the first flow channel 321 and the third flow channel 323 is the same, which is beneficial to improving the overall flow resistance constancy of the submerged constant flow resistance four-way valve 100.

[0097] In some embodiments, the first flow channel 321 and the third flow channel 323 are approximately C-shaped in the cross-section of the distribution shaft 320. The second flow channel 322 has a structure that contracts in the middle and expands symmetrically into a trumpet shape at both ends in the cross-section of the distribution shaft 320. This structure can increase the flow resistance of the second flow channel 322, thereby reducing the difference in flow resistance between different operating states and keeping the flow resistance as constant as possible.

[0098] Please combine Figure 15 In some embodiments, the distribution shaft 320 further has two symmetrically arranged intermediate flow channel walls, namely a first intermediate flow channel wall 325 and a second intermediate flow channel wall 326. The first arcuate wall 324a has a first inner wall 3241, and the second arcuate wall 324b has a second inner wall 3242. The space between the first inner wall 3241 and the first intermediate flow channel wall 325 forms a first flow channel 321; the space between the first intermediate flow channel wall 325 and the second intermediate flow channel wall 326 forms a second flow channel 322; and the space between the second inner wall 3242 and the second intermediate flow channel wall 326 forms a third flow channel 323. The first inner wall 3241 and the second inner wall 3242 are parallel to the center plane of the second flow channel 322, and the center plane of the second flow channel 322 is a plane parallel to the axis of the distribution shaft 320. The first intermediate flow channel wall 325 and the second intermediate flow channel wall 326 each have two end walls 3252 and one intermediate wall 3251, both of which are planar; the intermediate wall 3251 is parallel to the center plane of the second flow channel 322. The flow channel structure in this embodiment avoids complex arc-shaped streamlines, facilitates dimensional optimization design, and the three-channel structure layout is compact, making full use of the entire distribution axis space and increasing the flow rate in a limited space.

[0099] In some embodiments, the first arcuate wall 324a, the second arcuate wall 324b, the first intermediate flow channel wall 325, and the second intermediate flow channel wall 326 can all fit against the arcuate surface 3421 of the annular seal 342 to improve the sealing performance between the port of the corresponding flow channel and the corresponding valve port.

[0100] In some embodiments, the intermediate wall 3251 of the first intermediate flow channel wall 325 has a first intermediate wall surface 32511 and a second intermediate wall surface 32512, and the intermediate wall 3251 of the second intermediate flow channel wall 326 has a third intermediate wall surface 3261 and a fourth intermediate wall surface 3262; the first intermediate wall surface 32511 and the second intermediate wall surface 32512 are respectively the surfaces of the first flow channel side and the second flow channel side, and the third intermediate wall surface 3261 and the fourth intermediate wall surface 3262 are respectively the surfaces of the second flow channel side and the third flow channel side.

[0101] The distance between the first inner wall 3241 and the first intermediate wall 32511 is Wa, the distance between the second intermediate wall 32512 and the third intermediate wall 3261 is Wb, and the distance between the fourth intermediate wall 3262 and the second inner wall 3242 is Wc, where Wa = Wc > 2Wb. This structure ensures that the flow area of ​​the middle section of the first flow channel 321 and the middle section of the third flow channel 323 are the same, and both are greater than twice the flow area of ​​the middle section of the second flow channel 322. Under the same fluid parameters, the flow resistance of the fluid flowing through the first flow channel 321 is approximately half that of the fluid flowing through the second flow channel 322. The third flow channel 323 has the same shape and size as the first flow channel 321, and under the same fluid parameters, the flow resistance of the fluid flowing through the third flow channel 323 is also approximately half that of the fluid flowing through the second flow channel 322.

[0102] refer to Figure 10 , Figure 12 , Figure 14 In the self-circulating operating state, the fluid flows through the second flow channel 322 only once. In the water injection and drainage operating states, the fluid needs to flow through both the first flow channel 321 and the third flow channel 323 simultaneously. That is, in both the water injection and drainage operating states, the total flow resistance of the submerged constant flow resistance four-way valve 100 includes the flow resistance through the first flow channel 321 and the third flow channel 323. In the embodiments of this application, through the size design of Wa=Wc>2Wb, the flow resistance of the submerged constant flow resistance four-way valve 100 is basically the same in the self-circulating, water injection, and drainage operating states. Similarly, the flow resistance can also remain basically constant in the water injection and water injection / drainage adjustment operating states. In the embodiments of this application, the constant flow resistance of the submerged constant flow resistance four-way valve 100 in various operating states can be guaranteed.

[0103] In some embodiments, the distribution shaft 320 also has two shaft ends, which are the top and bottom ends of the distribution shaft 320, respectively. When the valve core (32) rotates, the two shaft ends remain in contact with the annular seal 342, thereby improving the stability of the valve core rotation.

[0104] Please combine Figure 16 In some embodiments, a method for designing the flow channel parameters of a constant flow resistance four-way valve is provided to design the flow channel structure efficiently and with high quality. The constant flow resistance four-way valve can be the submersible constant flow resistance four-way valve in any of the above embodiments. The design method includes the following steps.

[0105] S1. Based on the structure of the submerged constant flow resistance four-way valve, determine the flow channel structure parameter characteristics; the flow channel structure parameter characteristics include fixed parameters and parameters to be optimized, wherein the fixed parameters include at least the height of each flow channel, and the parameters to be optimized include at least the width of each flow channel.

[0106] S2. Based on the constant current resistance characteristics, preset the initial values ​​of the parameters to be optimized.

[0107] S3. Based on the initial values ​​of the parameters to be optimized, establish the geometric model of the submerged constant flow resistance four-way valve. The geometric model is a parametric model.

[0108] S4. Based on the parametric model and preset environmental parameters, use fluid simulation software to perform flow field analysis and calculate the flow resistance under various operating conditions.

[0109] S5. For the parameter to be optimized, different parameter values ​​are selected at step intervals for calculation until the flow resistance under each operating condition meets the constant flow resistance requirement. Each operating condition includes the first connection position, the cutoff position, the second connection position, the first flow regulation position, and the second flow regulation position; these five operating conditions correspond to five working states. Constant flow resistance under each operating condition can be understood as follows: the flow resistance under each operating condition is approximately the same, and the positive and negative deviations between operating conditions are within the allowable deviation range. The deviation range is set by the operator according to actual working needs; no specific limit is imposed on the size of the deviation range here. The process of selecting different parameter values ​​at step intervals can be an incremental or decremental process from the initial value of the parameter to be optimized. The increment or decrement process can be at equal or unequal intervals.

[0110] In some embodiments, the flow channel structural parameter characteristics that meet the constant flow resistance requirements under various operating conditions are used as standard flow channel structural parameter characteristics, and the flow channel can be manufactured based on these standard flow channel structural parameter characteristics.

[0111] Compared with existing technologies, the aforementioned flow channel parameter design method involves fewer flow channel structural parameters. By selecting the parameter values ​​of the parameters to be optimized in a step-by-step manner, submerged constant flow resistance four-way valve models with different structural parameters are established, and the working process of each model is simulated. For the same model, there is no need to repeatedly calculate and verify. On the one hand, this saves R&D time and improves the efficiency of flow channel structure design. On the other hand, it simplifies the design process and helps to better control the design quality.

[0112] In some embodiments, the fixed parameters also include the diameter D of the valve core 32, the maximum thickness Wd of the arc wall 324, and the wall thickness Wz of the intermediate flow channel, and the parameters to be optimized include the center widths Wa, Wb, and Wc of the first flow channel 321, the second flow channel 322, and the third flow channel 323.

[0113] It should be understood that the intermediate flow channel walls include a first intermediate flow channel wall 325 and a second intermediate flow channel wall 326, both with the same wall thickness, Wz. The center width Wa of the first flow channel 321 is the distance between the first inner wall 3241 and the first intermediate wall surface 32511; the center width Wb of the second flow channel 322 is the distance between the second intermediate wall surface 32512 and the third intermediate wall surface 3261; and the center width Wc of the third flow channel 323 is the distance between the fourth intermediate wall surface 3262 and the second inner wall 3242.

[0114] In some embodiments, the initial values ​​of the center width Wa of the first flow channel 321, the center width Wb of the second flow channel 322, and the center width Wc of the third flow channel 323 are Wa0, Wb0, and Wc0, respectively; the initial value of the preset parameter to be optimized is: Wb0=Wa0 / 2=Wc0 / 2, where Wa0+Wb0+Wc0+2Wd+2Wz=D.

[0115] In some embodiments, the preset environmental parameters include fluid pressure and flow rate under various operating conditions, and each operating condition includes a first connecting position, a shut-off position, a second connecting position, a first flow rate regulating position, and a second flow rate regulating position. By preset environmental parameters, the respective working states of the submersible constant flow resistance four-way valve 100 can be simulated more realistically, and better simulation results can be obtained.

[0116] In some embodiments, the application scenarios of using fluid simulation software for flow field analysis include the following processes.

[0117] The calculation is performed step by step using different values ​​of Wb until the flow resistance difference of the fluid flowing through the submerged constant flow resistance four-way valve 100 is within the preset threshold range when the valve is in the first connected position, the cut-off position, and the second connected position. The initial value of Wb is Wb0=Wa / 2=Wc / 2.

[0118] Specifically, in the fluid simulation software, the initial values ​​of Wa and Wb are preset as Wb0 and Wc, where Wb0 = Wa / 2 = Wc / 2.

[0119] like Figure 19 As shown, the fluid pressure and flow rate at the third valve port 353 of the submerged constant flow resistance four-way valve 100 in the first connected position are preset in the fluid simulation software. The flow resistance A1 of the submerged constant flow resistance four-way valve 100 in the first connected position is calculated using the fluid simulation software.

[0120] like Figure 18 As shown, the fluid pressure and flow rate at the fourth valve port 354 of the submerged constant flow resistance four-way valve 100 in the shut-off position are preset in the fluid simulation software. The flow resistance A2 of the submerged constant flow resistance four-way valve 100 in the shut-off position is calculated using the fluid simulation software.

[0121] like Figure 17 As shown, the fluid pressure and flow rate at the first valve port 351 of the submerged constant flow resistance four-way valve 100 in the second connected position are preset in the fluid simulation software. The flow resistance A3 of the submerged constant flow resistance four-way valve 100 in the first connected position is calculated using the fluid simulation software.

[0122] like Figure 20 As shown, in the fluid simulation software, the fluid pressure and flow rate of the submerged constant flow resistance four-way valve 100 in the first flow adjustment position are preset, and the flow resistance A4 of the submerged constant flow resistance four-way valve 100 in the cut-off position is calculated using the fluid simulation software.

[0123] In the fluid simulation software, the fluid pressure and flow rate of the submerged constant flow resistance four-way valve 100 in the second flow regulation position are preset. The flow resistance A5 of the submerged constant flow resistance four-way valve 100 in the second flow regulation position is calculated using the fluid simulation software (simulation diagram not shown).

[0124] Compare the differences between A1, A2, A3, A4, and A5 to see if they are within a preset range. If they are within the preset range, then Wa, Wb0, and Wc are used as the final design values. If they are not within the preset range, then reduce Wa0 by a unit value and repeat the above process until the flow resistance difference of the fluid flowing through the submerged constant flow resistance four-way valve 100 is within the preset threshold range, thus obtaining the final Wb value.

[0125] Furthermore, the formula for calculating flow resistance includes the following.

[0126] (1) Flow velocity calculation. The formula for calculating flow velocity is as follows: ve = 4Q / πd 2 In the formula: Q is the flow rate (unit: m³ / s); d is the inner diameter of the pipe (unit: m).

[0127] (2) Reynolds coefficient. Re=v e d / γ, where: v e The average flow velocity is given in m / s; γ is the kinematic viscosity, taken as γ = 1.01 × 10⁻⁶ for water. -6 m 2 / s.

[0128] (3) Friction loss. The formula for calculating friction loss is as follows: h f =λLv e 2 / 2gd, where: h f The pipe head loss is measured in mH2O; L is the pipe length in meters; and g is the acceleration due to gravity in meters per second. 2 ).

[0129] The friction loss system is calculated using the following formula: when Re ≤ 4 × 103 When λ is approximately 0.032, the calculation is checked. When 4 × 10 3 <Re≤10 5 At that time, λ = 0.3164 / Re 0.25 When 10 5 <Re≤3×10 6 At that time, λ = 0.0032 + 0.221Re -0.237 .

[0130] (4) Local coefficient. ζ represents the local drag coefficient. The formula for calculating local loss is as follows: h j =ζv e 2 / 2g.

[0131] (5) Total head loss. The formula for calculating the total head loss ΔH is as follows: ΔH = h j +h f +ΔZ. ΔZ represents the height difference (in meters). ΔH can also be represented as flow resistance.

[0132] In some embodiments, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a method for designing the flow path parameters of a constant flow resistance four-way valve.

[0133] refer to Figure 22 In some embodiments, the computer device is an electronic device. At the hardware level, this electronic device includes a processor, an internal bus, a network interface, memory, and non-volatile memory, and may also include other hardware required for the business logic. The processor reads the corresponding computer program from the non-volatile memory into memory and then executes it to achieve the above-mentioned functionality. Figure 16 The method described herein. Of course, besides software implementation, this specification does not exclude other implementation methods, such as logic devices or a combination of hardware and software, etc. That is to say, the execution entity of the following processing flow is not limited to individual logic units, but can also be hardware or logic devices. It is understood that by simply performing some logic programming on the method flow using a hardware description language and programming it into an integrated circuit, the hardware circuit implementing the logic method flow can be obtained.

[0134] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A flow passage parameter design method of an immersed constant flow resistance four-way valve, characterized by, The design method includes: Based on the structure of the submersible constant flow resistance four-way valve (100), the flow channel structure parameter characteristics are determined. The flow channel structure parameter characteristics include fixed parameters and parameters to be optimized. The fixed parameters include at least the height of each flow channel, and the parameters to be optimized include at least the width of each flow channel. Based on the constant current resistance characteristics, the initial values ​​of the parameters to be optimized are preset; Based on the initial values ​​of the parameters to be optimized, a geometric model of the submerged constant flow resistance four-way valve (100) is established, and the geometric model is a parametric model. Based on the parametric model and preset environmental parameters, flow field analysis is performed using fluid simulation software to calculate the flow resistance under various operating conditions. For the parameters to be optimized, different parameter values ​​are selected at step intervals for calculation until the flow resistance under each operating condition meets the constant flow resistance requirement.

2. The flow passage parameter design method according to claim 1, wherein The submersible constant flow resistance four-way valve (100) includes a valve core (32), which has a first flow channel (321), a second flow channel (322) and a third flow channel (323). The fixed parameters also include the valve core (32) diameter D, the maximum thickness Wd of the arc wall (324) and the thickness Wz of the middle flow channel wall. The parameters to be optimized include the center widths Wa, Wb and Wc of the first flow channel (321), the second flow channel (322) and the third flow channel (323).

3. The flow passage parameter design method according to claim 2, wherein The initial values ​​of the center width Wa of the first flow channel (321), the center width Wb of the second flow channel (322), and the center width Wc of the third flow channel (323) are Wa0, Wb0, and Wc0, respectively; the initial value of the parameter to be optimized is preset to be: Wb0=Wa0 / 2=Wc0 / 2, where Wa0+Wb0+Wc0+2Wd+2Wz=D.

4. The flow passage parameter design method according to claim 3, wherein The preset environmental parameters include fluid pressure and flow rate under various operating conditions. Each operating condition includes a first connection position, a cut-off position, a second connection position, a first flow rate adjustment position, and a second flow rate adjustment position.

5. The flow passage parameter design method according to claim 4, wherein The four-way valve structure also includes a valve seat (31); the valve seat (31) has a first valve port (351), a second valve port (352), a third valve port (353) and a fourth valve port (354) arranged sequentially along its circumference; the valve core (32) is rotatably disposed in the valve seat (31), and the valve core (32) can be rotated sequentially to the first connecting position, the first flow regulating position, the shut-off position, the second flow regulating position and the second connecting position; When the valve core (32) is in the first communication position, the first valve port (351) and the fourth valve port (354) are connected through the first flow channel (321), and the second valve port (352) and the third valve port (353) are connected through the third flow channel (323). When the valve core (32) is in the first flow regulation position, the first valve port (351) and the fourth valve port (354) are connected through the first flow channel (321), the second valve port (352) and the third valve port (353) are connected through the third flow channel (323), and the second valve port (352) and the fourth valve port (354) are connected through the second flow channel (322). When the valve core (32) is in the cut-off position, the first valve port (351) and the third valve port (353) are cut off, and the second valve port (352) and the fourth valve port (354) are connected through the second flow channel (322). When the valve core (32) is in the second flow regulation position, the first valve port (351) and the second valve port (352) are connected through the first flow channel (321), the second valve port (352) and the fourth valve port (354) are connected through the second flow channel (322), and the third valve port (353) and the fourth valve port (354) are connected through the third flow channel (323); When the valve core (32) is in the second communication position, the first valve port (351) and the second valve port (352) are connected through the first flow channel (321), and the third valve port (353) and the fourth valve port (354) are connected through the third flow channel (323).

6. The flow passage parameter design method according to Claim 5, wherein The first flow channel (321), the second flow channel (322), and the third flow channel (323) all have rectangular cross-sections along their respective flow directions; The valve core (32) has a distribution shaft (320), and the first flow channel (321), the second flow channel (322), and the third flow channel (323) are all located on the distribution shaft. The first flow channel (321), the second flow channel (322), and the third flow channel (323) have a centrally symmetrical shape on the cross-section of the distribution shaft (320). The distribution shaft (320) is cylindrical and has a circumferential sidewall on the outside. The circumferential sidewall of the distribution shaft (320) is divided into a first region, a second region, a third region, a fourth region, a fifth region, a sixth region, a seventh region, and an eighth region in sequence along the circumferential direction. The first flow channel (321) and the third flow channel (323) are located on both sides of the second flow channel (322); The two ports of the first flow channel (321) are located in the first region and the seventh region, respectively; the two ports of the second flow channel (322) are located in the second region and the sixth region, respectively; and the two ports of the third flow channel (323) are located in the third region and the fifth region, respectively.

7. The flow channel parameter design method as described in claim 6, characterized in that, The first flow channel (321) and the third flow channel (323) are symmetrically located on both sides of the second flow channel (322); The distribution shaft (320) has two symmetrically arranged arc-shaped walls (324), namely a first arc-shaped wall (324a) and a second arc-shaped wall (324b); the outer surfaces of the first arc-shaped wall (324a) and the second arc-shaped wall (324b) are arc surfaces, which are part of the circumferential sidewalls. The arc surface of the first arc-shaped wall (324a) covers the eighth region, and the arc surface of the second arc-shaped wall (324b) covers the fourth region. When the valve core (32) is in the cut-off position, the two arc-shaped walls (324) are aligned and seal the first valve port (351) and the third valve port (353). The two ports of the first flow channel (321), the two ports of the second flow channel (322), and the two ports of the third flow channel (323) have the same shape and the same size; The distribution shaft (320) also has two symmetrically arranged intermediate flow channel walls, namely a first intermediate flow channel wall (325) and a second intermediate flow channel wall (326), and the space between the first intermediate flow channel wall (325) and the second intermediate flow channel wall (326) forms the second flow channel (322). The second flow channel (322) has a flared shape at both ends on the cross-section of the distribution shaft (320); The first arc-shaped wall (324a) has a first inner wall (3241), the second arc-shaped wall (324b) has a second inner wall (3242), the space between the first inner wall (3241) and the first intermediate flow channel wall (325) forms the first flow channel (321), and the space between the second inner wall (3242) and the second intermediate flow channel wall (326) forms the third flow channel (323). The first inner wall and the second inner wall are parallel to the center plane of the second flow channel (322), and the center plane of the second flow channel (322) is a plane parallel to the axis of the distribution shaft (320); The first intermediate flow channel wall (325) and the second intermediate flow channel wall (326) each have two end walls (3252) and one intermediate wall (3251), the end walls (3252) and the intermediate wall (3251) are both planar; the intermediate wall (3251) is parallel to the center plane of the second flow channel (322).

8. The flow channel parameter design method as described in claim 7, characterized in that, The intermediate wall (3251) of the first intermediate flow channel wall (325) has a first intermediate wall surface (32511) and a second intermediate wall surface (32512), and the intermediate wall (3251) of the second intermediate flow channel wall (326) has a third intermediate wall surface (3261) and a fourth intermediate wall surface (3262); the first intermediate wall surface (32511) and the second intermediate wall surface (32512) are respectively the surfaces of the first flow channel side and the second flow channel side, and the third intermediate wall surface (3261) and the fourth intermediate wall surface (3262) are respectively the surfaces of the second flow channel side and the third flow channel side; The distance between the first inner wall (3241) and the first intermediate wall (32511) is the center width Wa of the first flow channel, the distance between the second intermediate wall (32512) and the third intermediate wall (3261) is the center width Wb of the second flow channel, and the distance between the fourth intermediate wall (3262) and the second inner wall (3242) is the center width Wc of the third flow channel.

9. A submersible constant flow resistance four-way valve, characterized in that, The submersible constant flow resistance four-way valve (100) is designed using the flow channel parameter design method as described in any one of claims 1-8.

10. A computer device, characterized in that, The method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the steps of the method according to any one of claims 1-8.

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