Flow standard device and method based on digital twinning

Abstract

The application discloses a kind of flow standard device and method based on digital twinning, it is related to liquid flow device technical field.The flow standard device based on digital twinning, including the circulating water tank, horizontal single-stage centrifugal pump, pressure tank, detection mechanism, diverter and detection water tank that are sequentially arranged, wherein the diverter includes: diverter shell;Diverter pipe, the diverter pipe is located above diverter shell, the lower portion of diverter pipe is equipped with X-shaped pipe, two lower ends of X-shaped pipe are equipped with branch pipe;The flow standard device based on digital twinning and method, water receiving mechanism is arranged, water receiving mechanism is closed quickly when reversing action starts, the time point of its closure is the time when timer starts timing, effective measurement water volume is strictly limited in the time period when water receiving mechanism is completely closed, which makes the timer start timing, water flow is received by water receiving mechanism, so as to flow into target water tank, significantly improve the accuracy of detection result.

Description

Technical Field

[0001] This invention relates to the field of liquid flow device technology, specifically to a flow standard device and method based on digital twins. Background Technology

[0002] A flow standard device based on digital twins is a specialized piece of equipment used for verifying and calibrating flow meters. It must meet requirements such as high precision and high repeatability. Its core components include a fluid source system, a standard instrument, test piping, a control system, and a data acquisition system. By using a sensor network to collect key parameters of the physical device in real time, such as flow rate, temperature, pressure, and vibration, and combining this with fluid dynamics characteristics and geometric parameters, a high-fidelity virtual model is constructed. This ensures that the virtual state converges at the same rate as the physical state, achieving dynamic matching with the physical device.

[0003] In existing digital twin-based flow standard devices, the commonly used commutators are mainly open commutators. Open commutators are generally pneumatic commutators. In order to reduce the time it takes for one part of the water nozzle to enter the circulating water tank and the other part to enter the detection water tank during commutation, these commutators are generally designed with flat nozzles.

[0004] However, the flat nozzle of this type of commutator has an inherent fundamental flaw in its commutation process: it uses a "water flow cutting" method for measurement. In this mode, the "commutation time" (t) recorded by the timer is not physically synchronized with the "effective measurement time" (t') during which the water flow is truly complete and flows only to the target tank. Specifically, at the instant the timing begins (t0), only the edge of the water flow enters the target tank, while most of the water still flows to the original tank; and at the instant the timing ends (t1), the water flow has not yet completely switched to the target tank.

[0005] Therefore, during the entire core metering period, the water flow is actually in an uncertain "splitting" or "forking" state. More importantly, the proportion and duration of this splitting are affected by a combination of factors such as the mechanical dynamic performance of the commutator, fluid velocity, and viscosity, resulting in systematic, variable, and difficult-to-calibrate errors. This becomes a bottleneck restricting the improvement of the device's ultimate accuracy. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a flow standard device and method based on digital twins, which solves the problem that during the reversal process, a portion of the water still enters the circulating water tank while another portion enters the detection water tank, resulting in inaccurate detection results.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a flow standard device based on digital twins, comprising a circulating water tank, a horizontal single-stage centrifugal pump, a pressure stabilizing tank, a detection mechanism, a diverter, and a detection water tank arranged sequentially, wherein the diverter includes:

[0008] Steering housing;

[0009] The steering tube is located above the steering housing, and an X-shaped tube is provided below the steering tube. Both lower ends of the X-shaped tube are provided with branch tubes.

[0010] A push cylinder is mounted on the steering housing. The push cylinder can push the X-shaped tube to swing inside the steering housing. The length of the branch tube along its swing direction is not less than the length perpendicular to its swing direction.

[0011] The water receiving mechanism is located below the branch pipe. The push cylinder can drive the water receiving mechanism to swing synchronously with the X-shaped pipe. When the water receiving mechanism swings, it can close quickly to receive the water flow from the branch pipe. When the water receiving mechanism finishes swinging, it can open automatically to release the water flow.

[0012] Furthermore, the branch pipe is a square pipe, a round pipe, or a flat pipe, and the thickness direction of the flat pipe is the same as the swing direction of the X-shaped pipe.

[0013] Furthermore, the water receiving mechanism includes:

[0014] The receiving box is provided in two sets, and each set of receiving boxes is equipped with two receiving plates. When the two receiving plates are closed, they can receive the water flow from the branch pipe.

[0015] The frame is a fan-shaped frame structure. Guide rails are installed on both sides of the upper surface of the frame. Sliders are installed at the four corners of the upper surface of the supporting plate through connecting frames. The sliders can slide on the guide rails.

[0016] The frame is provided with a second swing arm at both ends, and the push cylinder is also used to push the second swing arm to swing, so that the frame and the branch pipe swing synchronously.

[0017] Furthermore, a force-bearing structure is installed on the end receiving plate, and a second sliding groove is provided on the area of ​​the steering shell opposite to the swing direction of the force-bearing structure. A second slider is provided in the second sliding groove. The force-bearing structure includes an inner rod fixed at one end to the receiving plate and a ball at the other end of the inner rod. A spring is provided at the end of the second slider near the ball.

[0018] The steering housing is fixed with a rail pressing structure, which includes a horizontal rail one, a slant rail one, a horizontal rail two, a slant rail two, and a horizontal rail three arranged in sequence, and the ball bearings roll on the rail pressing structure.

[0019] Furthermore, the water receiving mechanism also includes a counter-movement structure, which includes a gear between two receiving plates located in the same group of receiving boxes, and the gear is mounted on a guide rail. A rack plate one is mounted on the slider of one of the receiving plates, and a rack plate two is mounted on the slider of the other receiving plate.

[0020] Furthermore, both ends of the steering tube are provided with fixed tubes, the steering tube is rotatably mounted on the fixed tubes, and the fixed tubes are fixed to the conversion bracket by the first fixing frame;

[0021] The second swing arm includes a crossbar fixed to the end of the frame, a swing arm located above the crossbar, and a collar fixed to the upper end of the crossbar. The collar is collinear with the center of the steering tube. A fixing ring is provided on the outside of the fixing tube and the fixing ring is fixed on the conversion bracket. The collar is rotatably mounted on the fixing ring, and the fixing ring and the fixing tube are fitted with a clearance.

[0022] Furthermore, the steering shell includes an outer shell and an inner shell located inside the outer shell. The outer shell is a short-sleeved structure containing a short tube and a long tube. The short tube is used to guide water to the detection water tank, and the long tube is used to guide water to the circulating water tank.

[0023] The inner shell is a trouser-style structure with equal lengths at both ends. The X-shaped tube swings inside the inner shell. Multiple sets of inserts are provided at one end of the inner shell near the short cylinder. A drainage structure connected to the inserts is provided inside the short cylinder. A hoist for driving the drainage structure to rise and fall is also provided above the steering shell.

[0024] Furthermore, the drainage structure includes:

[0025] The outer tube is provided with a spiral groove, which is a groove with less than one turn.

[0026] The inner tube of the superior arc is sleeved in the spiral through groove. The upper and lower ends of the inner tube of the superior arc are fixed with limiting rings, and the limiting rings are rotatably connected to the outer tube.

[0027] The cannula is inserted into the spiral groove.

[0028] Furthermore, the lower part of the insertion tube is provided with a spiral block adapted to the inner tube of the superior arc.

[0029] On the other hand, the present invention also provides a traffic standard method based on digital twins, comprising the following steps:

[0030] During the water circulation stage, the horizontal single-stage centrifugal pump pumps the circulating water in the circulating water tank into the testing mechanism, and flows through the standard gauge and the testing gauge. Finally, it flows back into the circulating water tank through the diverting pipe and the diverting shell, filling the testing mechanism with water.

[0031] During the testing phase, the cylinder is extended, causing the water receiving mechanism and the X-shaped tube to swing. At the same time, the water receiving mechanism closes and receives water from the turning tube until the turning tube completes its turn. Then, the water receiving mechanism opens and releases the water inside into the testing water tank.

[0032] The present invention has the following beneficial effects:

[0033] (1) The flow standard device and method based on digital twins is equipped with a water receiving mechanism that closes rapidly at the start of the reversing action, forming a physical container. The closing time is the time when the timer starts counting. The effective water volume is strictly limited to the time period during which the water receiving mechanism is fully closed. This ensures that after the timer starts counting, the water flow is received by the water receiving mechanism and flows into the target water tank, significantly improving the accuracy of the detection results. In addition, due to the setting of the water receiving device, the measurement accuracy of this device is no longer limited by the reversing speed of the reversing device, the fluid velocity, and the viscosity.

[0034] (2) The flow standard device and method based on digital twins has a height-adjustable drainage structure. Water is drained into the detection tank in this way, which can avoid the situation of easy evaporation caused by excessive water disturbance and avoid occupying the space inside the detection tank.

[0035] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0036] Figure 1 This is an overall diagram of the present invention;

[0037] Figure 2 This is a schematic diagram of the detection mechanism of the present invention;

[0038] Figure 3 This is a schematic diagram of the steering mechanism of the present invention;

[0039] Figure 4 This is a schematic diagram of the installation of the hoist of the present invention;

[0040] Figure 5 This is a schematic diagram of the internal structure of the inner shell of the present invention;

[0041] Figure 6 For the present invention Figure 5 Another perspective view;

[0042] Figure 7 This is a schematic diagram of the installation of the steering pipe of the present invention;

[0043] Figure 8 This is a cross-sectional view of the outer casing of the present invention;

[0044] Figure 9This is a schematic diagram of the internal structure of the inner shell of the present invention;

[0045] Figure 10 For the present invention Figure 9 Exploded view;

[0046] Figure 11 This is a schematic diagram of the branch pipe of the present invention using a flat pipe;

[0047] Figure 12 This is an assembly diagram of the second swing arm and the water receiving mechanism of the present invention;

[0048] Figure 13 This is a diagram showing the closed state of the water receiving mechanism of the present invention;

[0049] Figure 14 This is a schematic diagram showing the position of the photoelectric sensor of the present invention;

[0050] Figure 15 For the present invention Figure 12 Enlarged view of area B;

[0051] Figure 16 This is a schematic diagram of the rail pressing structure of the present invention;

[0052] Figure 17 For the present invention Figure 6 Enlarged view of area A;

[0053] Figure 18 This is a schematic diagram of the installation of the drainage structure of the present invention;

[0054] Figure 19 This is an assembly diagram of the cannula and spiral block of the present invention;

[0055] Figure 20 This is an exploded view of the outer tube and the inner tube of the superior arc of the present invention.

[0056] In the diagram: 1. Circulating water tank; 2. Horizontal single-stage centrifugal pump; 3. Pressure stabilizing tank; 4. Pump tank drain pipe; 5. Connecting pipe; 6. Workshop support; 7. Diverting housing; 71. Outer shell; 711. Short cylinder; 712. Long cylinder; 72. Inner shell; 721. Fully hollow water outlet; 722. Second chute; 723. First chute; 724. Insert pipe; 725. Spiral block; 8. Drainage structure; 81. Outer pipe 811. Spiral groove; 82. Limiting ring; 83. Hanging rod; 84. Inner tube with superior arc; 9. Water receiving mechanism; 91. Receiving plate; 92. Frame; 93. Slider; 94. Load-bearing structure; 941. Spring; 942. Inner rod; 943. Ball bearing; 95. Guide rail; 96. Opposing structure; 961. Rack plate one; 962. Gear; 963. Rack plate two; 97. Connecting frame; 98. Slider Block 2; 10. Manifold; 11. Diverting pipe; 111. Fixed pipe; 112. X-shaped pipe; 113. Branch pipe; 114. Shielding plate; 115. Photoelectric sensor; 12. Bridge frame; 13. First fixed frame; 14. Fixed ring; 15. Second swing arm; 151. Collar; 152. Swing rod; 153. Crossbar; 16. Rail pressing structure; 161. Flat rail one; 162. Inclined rail one; 163. Flat rail two; 164. Inclined rail two; 165. Flat rail three; 17. Lifting hoist; 18. Conversion bracket; 19. Detection water tank; 20. Push cylinder; 21. Standard gauge front end pipe; 22. Standard gauge rear end pipe; 23. Detection gauge front end pipe; 24. Detection gauge middle pipe one; 25. Detection gauge middle pipe two; 26. Cylinder section floating pipe; 27. Pneumatic regulating valve; 28. Manifold adapter pipe. Detailed Implementation

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0059] The following is based on Figures 1-20 This invention describes a flow standard device and method based on digital twins provided in embodiments of the present invention.

[0060] Please see Figure 1This invention provides a technical solution: a flow standard device based on digital twins, comprising a circulating water tank 1, a horizontal single-stage centrifugal pump 2, a pressure stabilizing tank 3, a detection mechanism, a diverter, and a detection water tank 19 arranged sequentially. The circulating water tank 1 serves as the starting and ending point of the water circulation of the entire device. The horizontal single-stage centrifugal pump 2 pumps water from the circulating water tank 1 into the pressure stabilizing tank 3 (this is because the horizontal single-stage centrifugal pump 2 may generate pressure fluctuations during operation, which can affect the accuracy of flow detection). The water in the pressure stabilizing tank 3 can return to the circulating water tank 1 after passing through the detection mechanism. During detection, the water flow enters the detection water tank 19 through the diverter. The detection water tank 19 can be used for both weight and volume detection.

[0061] Preferably, an on / off valve is installed below the detection water tank 19 and extends into the circulating water tank 1. After the detection water tank 19 has completed the detection, the water in the detection water tank 19 can be returned to the circulating water tank 1 by opening the on / off valve, which facilitates water circulation.

[0062] The aforementioned testing mechanism is installed on the workshop support 6. A pump tank drain pipe 4 is installed between the testing mechanism and the pressure stabilizing tank 3. The testing mechanism includes a connecting pipe 5 fixedly connected to the pump tank drain pipe 4, and subsequently installed in sequence as follows: standard meter front end pipe 21, standard meter rear end pipe 22, test meter front end pipe 23, test meter intermediate pipe one 24, test meter intermediate pipe two 25, cylinder section floating pipe 26, pneumatic regulating valve 27, manifold adapter pipe 28, and manifold 10. The manifold 10 is fixed to the fixed pipe 111. The standard meter is assembled between the standard meter front end pipe 21 and the standard meter rear end pipe 22. The test meter to be tested is assembled between the test meter intermediate pipe one 24 and the test meter intermediate pipe two 25. The test meter to be tested is also assembled between the test meter intermediate pipe two 25 and the cylinder section floating pipe 26. Water flows through the standard meter and the test meter to be tested into the manifold adapter pipe 28 and the manifold 10, and then into the fixed pipe 111.

[0063] Combination Figures 3-7 As shown, the steering mechanism includes a steering housing 7, a water receiving mechanism 9, a conversion bracket 18, and a push cylinder 20. The conversion bracket 18 supports the steering housing 7 above the circulating water tank 1. An X-shaped pipe 112 is provided below the steering pipe 11. Both lower ends of the X-shaped pipe 112 are provided with branch pipes 113. The steering pipe 11 receives water from the detection mechanism and disperses the water inside itself into the X-shaped pipe 112 and into the branch pipes 113 (the reason for setting the X-shaped pipe 112 and the two branch pipes 113 is to accommodate the water receiving mechanism 9, which will be explained in detail below). The push cylinder 20 is installed on the steering housing 7. The push cylinder 20 can push the X-shaped pipe 112 to swing inside the steering housing 7. The length of the branch pipe 113 along its swing direction is not less than the length perpendicular to its swing direction.

[0064] The water receiving mechanism 9 is located below the branch pipe 113. The push cylinder 20 can drive the water receiving mechanism 9 to swing synchronously with the X-shaped pipe 112. The water receiving mechanism 9 can close quickly when it swings to receive the water flow from the branch pipe 113. The water receiving mechanism 9 can automatically open after it finishes swinging to release the water flow.

[0065] Combination Figures 12-14 As shown, the detection of this device uses a photoelectric sensor 115 installed on the steering housing 7 and a shielding plate 114 at the end of the steering pipe 11. When the push cylinder 20 receives the signal to start detection and extends, the push cylinder 20 extends (normally the branch pipe 113 is aligned with the circulating water tank 1, rather than with the middle of the steering housing 7), which simultaneously drives two things: pushing the X-shaped pipe 112 and the branch pipe 113 to swing.

[0066] The second swing arm 15 drives the water receiving mechanism 9 to swing synchronously, and in the process, it quickly closes into a sealed container. The timer is triggered only when the water receiving mechanism 9 confirms that it is completely closed, that is, when the ball bearing 943 reaches the intersection of the inclined rail 162 and the horizontal rail 163. This means that at the moment the timer starts (T0), the water flow from the branch pipe 113 has been completely trapped inside the water receiving mechanism 9.

[0067] The forward reversal process (to the detection tank 19) is as follows:

[0068] Before T0: The water receiving mechanism 9 gradually closes during the swing, and it does not store water at this time.

[0069] At time T0: the water receiving mechanism 9 is fully closed, and the timing officially begins. At this time, the dynamics of the water flow in the entire water system no longer affect the timing reference.

[0070] After T0: The closed water receiving mechanism 9 carries the water flow and moves to directly above the detection water tank 19.

[0071] After that, the water receiving mechanism 9 will automatically open, injecting the water stored inside into the detection water tank 19 in a defined, static release manner.

[0072] The reason for setting up the X-shaped pipe 112 to disperse the water flow in the diverting pipe 11 into the two branch pipes 113 is that this can reduce the opening and closing stroke of the water receiving mechanism 9 (its opening and closing stroke is only the thickness of one of the branch pipes 113, and the thickness refers to the direction perpendicular to its swing direction), thereby reducing the size of the equipment.

[0073] Optionally, branch pipe 113 can be a square pipe or a round pipe (see reference). Figure 9 and Figure 10 ) or flat tube (refer to) Figure 11 ).

[0074] Preferably, branch pipe 113 is a flat pipe, the thickness direction of which is the same as the swing direction of X-shaped pipe 112. The installation direction of this flat pipe is actually opposite to the installation direction of flat pipes in the prior art, where the thickness direction of flat pipes should point to... Figure 11 The parallel direction is to reduce the thickness of the water in its turning direction when turning, thereby reducing the time it takes for part of the water flow from branch pipe 113 to enter the circulating water tank 1 and the other part to enter the detection water tank 19, and improving the accuracy of water intake; however, the reason why it is assembled in this embodiment is Figure 11 The state shown is to reduce the opening and closing stroke of the water receiving mechanism 9. Because of the water receiving function of the water receiving mechanism 9, the water will directly enter the interior of the water receiving mechanism 9 when it swings. There is no situation where part of the water enters the circulating water tank 1 and part enters the detection water tank 19. Therefore, it is preferable to design it as a flat tube in this direction.

[0075] like Figure 12 and Figure 13 The aforementioned water receiving mechanism 9 includes a receiving box, and two sets of receiving boxes are provided, such as... Figure 13 This is a diagram showing the water receiving status of two sets of receiving boxes. Figure 12 With both sets of receiving boxes open, each set of receiving boxes is equipped with two receiving plates 91. The receiving plates 91 are arc-shaped plates with baffles on three sides, forming a half-box structure. When the two half-box structures are put together, they can form a hollow receiving box at the top to receive the water flow from the branch pipe 113.

[0076] Preferably, the receiving plate 91 is set at an angle, with the mating side of the two receiving plates 91 being lower and the other side being higher, so that the receiving plate 91 does not store water when it is not closed.

[0077] To achieve the opening and closing action described above, a frame 92 is provided for the receiving box. The frame 92 is a fan-shaped frame structure. Guide rails 95 are installed on both sides of the upper surface of the frame 92. Slider 93 is installed at the four corners of the upper surface of the receiving plate 91 through the connecting frame 97. The slider 93 can slide on the guide rail 95. When the opposing sliders 93 on the two receiving plates 91 of the same receiving box approach each other, the two receiving plates 91 close. A second swing arm 15 is provided at both ends of the frame 92. The push cylinder 20 is also used to push the second swing arm 15 to swing, so that the frame 92 swings synchronously with the branch pipe 113, thereby achieving the state of the water receiving mechanism 9 following the branch pipe 113 to receive water.

[0078] In order to bring the opposing sliders 93 on the two receiving plates 91 on the same set of receiving boxes closer to each other, a force-bearing structure 94 and a displacement structure 96 are also provided here.

[0079] Specifically, in combination Figure 10 , Figure 12 , Figure 13 , Figure 15 and Figure 16 As shown, a force-bearing structure 94 is installed on the end receiving plate 91. A second slide groove 722 is provided on the area of ​​the steering shell 7 opposite to the swing direction of the force-bearing structure 94. A second slider 98 is provided in the second slide groove 722. The force-bearing structure 94 includes an inner rod 942 fixed at one end to the receiving plate 91 (the inner rod 942 can slide on the second slider 98) and a ball 943 provided at the other end of the inner rod 942. A spring 941 is provided at one end of the second slider 98 near the ball 943. A pressure rail structure 16 is fixed on the steering shell 7. The pressure rail structure 16 includes a first flat rail 161, a first inclined rail 162, a second flat rail 163, a second inclined rail 164 and a third flat rail 165 arranged in sequence. The ball 943 rolls on the pressure rail structure 16.

[0080] In this embodiment, a first groove 723 is provided on the steering housing 7 to avoid the swing of the second swing arm 15. When the second swing arm 15 swings, it can drive the lower frame 92 to swing. When the frame 92 swings, it drives all the support plates 91 to swing, and then the ball 943 moves from the flat rail 161 to the inclined rail 162 and slides on the inclined rail 162. The inclined rail 162 pushes the inner rod 942 and compresses the spring 941, and the support plate 91 at the end slides. Due to the action of the displacement structure 96, the two support plates 91 can close at this time until the ball 943 reaches the junction of the inclined rail 162 and the flat rail 2 163. At this time, the support plate 91 is completely closed, and the support plate 91 has not yet started to enter the top of the detection water tank 19 (equivalent to the time when the ball 943 moves on the inclined rail 162 in the prior art is the time when the support plate 91 is at the top). As the device gradually closes, when it reaches the intersection of inclined rail 162 and horizontal rail 2 163, the timer starts counting. As ball bearing 943 slides on horizontal rail 2 163, receiving plate 91 begins to enter the upper part of the detection water tank 19 in a closed state. After fully entering the upper part of the detection water tank 19, ball bearing 943 reaches inclined rail 2 164. At this time, receiving plate 91 gradually opens, and water enters the detection water tank 19. Water in branch pipe 113 also begins to enter the detection water tank 19 until ball bearing 943 reaches horizontal rail 3 165. Receiving plate 91 remains open, and branch pipe 113 continues to supply water to the detection water tank 19 until the required water volume is reached. This pushes cylinder 20 to pull back X-shaped pipe 112. At this time, second swing arm 15 is also pulled back, and water receiving mechanism 9 begins to repeat the above actions in reverse, thus completing one detection cycle.

[0081] It is preferable to place rubber pads on the mating surfaces of the two receiving plates 91, which can serve as a seal and also buffer the situation caused by the rapid closing of the two receiving plates 91.

[0082] The aforementioned shifting structure 96 includes a gear 962 between two receiving plates 91 located in the same group of receiving boxes, and the gear 962 is mounted on a guide rail 95. A rack plate 961 is mounted on the slider 93 of one of the receiving plates 91, and a rack plate 963 is mounted on the slider 93 of the other receiving plate 91.

[0083] In this embodiment, when the receiving plate 91 at the end moves, it can drive the rack plate 961 to move, thereby rotating the gear 962, which in turn pushes the rack plate 963 to move, realizing the relative movement of the two opposing sliders 93 towards or away from each other, and thus realizing the opening and closing action of the receiving plate 91.

[0084] To facilitate the installation of the steering tube 11, both ends of the steering tube 11 in this embodiment of the invention are provided with fixing tubes 111. The steering tube 11 is rotatably mounted on the fixing tubes 111. The fixing tubes 111 are fixed on the conversion bracket 18 by the first fixing bracket 13. Thus, when the push cylinder 20 applies a thrust, the steering tube 11 can rotate on the conversion bracket 18 to the required angle.

[0085] like Figure 9 , Figure 10 , Figure 12 and Figure 17 As shown, the reason for additionally setting a second swing arm 15 instead of directly fixing the frame 92 to the branch pipe 113 is to avoid the branch pipe 113 shaking due to the resistance of the water receiving mechanism 9. Specifically, the second swing arm 15 includes a crossbar 153 fixed to the end of the frame 92, a swing rod 152 set above the crossbar 153, and a collar 151 fixed to the upper end of the crossbar 153. The collar 151 is collinear with the center of the turning pipe 11. A fixing ring 14 is provided on the outside of the fixed pipe 111, and the fixing ring 14 is fixed on the conversion bracket 18. The collar 151 is rotatably mounted on the fixing ring 14. The fixing ring 14 and the fixed pipe 111 are in clearance fit, so the fixing ring 14 and the fixed pipe 111 do not contact each other and will not directly transmit vibration, ensuring the stability of the fixed pipe 111 and the turning pipe 11, and ensuring the stable operation of the shield 114.

[0086] In actual operation, the legs of the trouser-shaped steering shell 7 should be of different lengths, with the longer leg aligned with the circulating water tank 1 and the shorter leg aligned with the detection water tank 19. This method has certain drawbacks: when water enters the detection water tank 19 from the shorter leg, internal fluctuations are significant, leading to easy evaporation and inaccurate detection results. However, if the leg above the detection water tank 19 is also made to be a long leg, it would occupy internal space within the detection water tank 19, significantly impacting volume-based detection methods. Therefore, in this invention, if... Figures 4-6 as well as Figures 18-20As shown, the steering housing 7 includes an outer shell 71 and an inner shell 72 located inside the outer shell 71. The outer shell 71 is a short-sleeved structure containing a short cylinder 711 and a long cylinder 712. The short cylinder 711 is used to guide water to the detection water tank 19, and the long cylinder 712 is used to guide water to the circulating water tank 1. The inner shell 72 is a short-sleeved structure with equal lengths at both ends (the side near the circulating water tank 1 has a fully empty water outlet 721, and the side near the detection water tank 19 has a water outlet with a pipe 724). The X-shaped pipe 112 swings inside the inner shell 72, so that the water flowing out of the branch pipe 113 first enters the inner shell 72 and then enters the outer shell 71. The inner shell 72 has multiple sets of pipes 724 at the end near the short cylinder 711, and the short cylinder 711 has a drainage structure connected to the pipes 724. 8. Above the steering housing 7, there is also a hoist 17 for driving the drainage structure 8 to rise and fall (specifically, a bridge frame 12 is installed above the housing 71, and the hoist 17 is assembled on the bridge frame 12). The drainage structure 8 never comes into contact with the water in the detection tank 19. It is equipped with a proximity sensor. When the proximity sensor detects that the liquid level in the detection tank 19 has risen to a distance of 8-15cm from the drainage structure 8, the proximity sensor controls the hoist 17 to lift the drainage structure 8 through the controller. Water is drained into the detection tank 19 in this adjustable height drainage structure 8. On the one hand, this avoids the situation of easy evaporation caused by excessive water disturbance. On the other hand, it avoids occupying the space inside the detection tank 19.

[0087] It should be noted that the first slide groove 723 and the second slide groove 722 are both formed on the inner shell 72, and the pressure rail structure 16 is fixed between the inner shell 72 and the outer shell 71.

[0088] Specifically, the drainage structure 8 includes an outer pipe 81 and an inner pipe 84 with a spiral groove 811 on the outer pipe 81. The spiral groove 811 is a groove with less than one turn. The inner pipe 84 with a spiral groove is fitted inside the spiral groove 811. The upper and lower ends of the inner pipe 84 with limiting rings 82 are fixedly provided. The limiting rings 82 are rotatably connected to the outer pipe 81. A lifting rod 83 is fixed between the upper ends of multiple limiting rings 82. The bridge frame 12 is provided with a guide groove for the lifting rod 83. The hoist 17 can directly lift the lifting rod 83. The aforementioned insertion pipe 724 is inserted into the spiral groove 811.

[0089] The inner tube 84 is used to block the spiral groove 811 from removing the area opposite to the insertion tube 724, so that the outer tube 81 can guide the liquid downward without leakage, and prevent the liquid from leaking out of the spiral groove 811.

[0090] In this embodiment, when the hoist 17 lifts the boom 83, the entire drainage structure 8 rises, and the insertion pipe 724 is always located in the spiral groove 811. Due to the limiting effect of the insertion pipe 724 and the spiral groove 811, the outer pipe 81 will also rotate during the rising process, ensuring that the insertion pipe 724 enters the inner pipe 84.

[0091] Furthermore, the lower part of the insertion tube 724 is provided with a spiral block 725 that is compatible with the inner tube 84 of the arc, thereby blocking the junction of the spiral through groove 811 and the hollow area of ​​the inner tube 84 of the arc, and preventing water leakage at that point.

[0092] During use (operation), the horizontal single-stage centrifugal pump 2 pumps the circulating water from the circulating water tank 1 into the testing mechanism, which then flows through the standard gauge and the test gauge. Finally, the water flows back into the circulating water tank 1 through the diverting pipe 11 and the diverting housing 7. Water also flows back into the circulating water tank 1 through the fixed pipe 111 and the diverting pipe 11, filling the testing mechanism with water. During testing, the cylinder 20 extends, simultaneously driving the branch pipe 113 and the second swing arm 15 to swing synchronously. The swing of the second swing arm 15 causes the lower frame 92 to swing. When the frame 92 swings... This causes all the receiving plates 91 to swing, and the balls 943 move from the flat rail 161 to the inclined rail 162, where they slide. The inclined rail 162 pushes the inner rod 942 and compresses the spring 941, causing the receiving plates 91 at the ends to slide. Due to the action of the displacement structure 96, the two receiving plates 91 can close at this time, until the balls 943 reach the junction of the inclined rail 162 and the flat rail 163. At this time, the receiving plates 91 are completely closed, but the receiving plates 91 have not yet begun to enter the area above the detection tank 19. When the balls 943 are on the flat rail 162... As the ball bearing 91 slides on rail 163, it begins to move above the detection tank 19 in a closed state. After fully entering the detection tank 19, the ball bearing 943 reaches the inclined rail 164. At this time, the ball bearing 91 gradually opens, and the water inside enters the detection tank 19. The water in the branch pipe 113 also begins to enter the inner shell 72 on the side opposite to the detection tank 19, until the ball bearing 943 reaches the flat rail 165. The ball bearing 91 remains open, and the water flows from the insertion pipe 724 into the arc-shaped inner pipe 84. When the proximity sensor detects... When the liquid level rises to a distance of 8-15cm from the drainage structure 8, the proximity sensor controls the hoist 17 to lift the drainage structure 8 via the controller. Water is then drained into the detection tank 19 using this adjustable-height drainage structure 8. This avoids excessive water disturbance that could lead to easy evaporation and also prevents the water from occupying space inside the detection tank 19. At the same time, the cooperation between the outer pipe 81 with the spiral groove 811 and the inner pipe 84 with the arc ensures that the entire drainage structure 8 can guide water downwards without leakage until the required water volume is reached.

[0093] The cylinder 20 is pushed to pull back the X-shaped tube 112. At this time, the second swing arm 15 is also pulled back. The water receiving mechanism 9 starts to repeat the above action in the opposite direction, so that the device completes one test.

[0094] On the other hand, embodiments of the present invention also provide a traffic standard method based on digital twins, comprising the following steps:

[0095] During the water circulation stage, the horizontal single-stage centrifugal pump 2 pumps the circulating water in the circulating water tank 1 into the testing mechanism, and flows through the standard gauge and the testing gauge. Finally, it flows back into the circulating water tank 1 through the diverting pipe 11 and the diverting shell 7, so that the testing mechanism is filled with water.

[0096] During the testing phase, the cylinder 20 is extended, which in turn causes the water receiving mechanism 9 and the X-shaped tube 112 to swing. At the same time, the water receiving mechanism 9 closes and receives water from the turning tube 11 until the turning tube 11 completes its turn. Then, the water receiving mechanism 9 opens and releases the water inside into the testing water tank 19.

[0097] Designing high-standard flow rate standard devices requires advanced technologies and methods. The development of next-generation information and communication technologies has given rise to the concept of digital twins. Based on digital twins, a digital model of a product can be virtually constructed, enabling simulation testing and effectively improving product reliability. Digital transformation in the development of flow rate standard devices is a key technological direction for the development of new standard devices.

[0098] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0099] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A flow rate standard device based on digital twin, comprising a circulating water tank (1), a horizontal single-stage centrifugal pump (2), a pressure stabilizing tank (3), a detection mechanism, a diverter, and a detection water tank (19) arranged sequentially, characterized in that, in, The steering system includes: Steering housing (7); Steering pipe (11), the steering pipe (11) is located above the steering housing (7), and an X-shaped pipe (112) is provided below the steering pipe (11), with branch pipes (113) provided at both lower ends of the X-shaped pipe (112). A push cylinder (20) is mounted on a steering housing (7). The push cylinder (20) can push the X-shaped tube (112) to swing inside the steering housing (7). The length of the branch tube (113) along its swing direction is not less than the length perpendicular to its swing direction. Water receiving mechanism (9) is located below the branch pipe (113). The push cylinder (20) can drive the water receiving mechanism (9) to swing synchronously with the X-shaped pipe (112). The water receiving mechanism (9) can close quickly when swinging to receive the water flow from the branch pipe (113). The water receiving mechanism (9) can automatically open after swinging to release the water flow. The water receiving mechanism (9) includes: The receiving box is provided in two sets. Each set of receiving boxes is provided with two receiving plates (91). When the two receiving plates (91) are closed, they can receive the water flow from the branch pipe (113). The frame (92) is a fan-shaped frame structure. Guide rails (95) are installed on both sides of the upper surface of the frame (92). Slider (93) is installed at the four corners of the upper surface of the support plate (91) through the connecting frame (97). The slider (93) can slide on the guide rail (95). The frame (92) is provided with a second swing arm (15) at both ends. The push cylinder (20) is also used to push the second swing arm (15) to swing, so that the frame (92) and the branch pipe (113) swing synchronously. A force-bearing structure (94) is installed on the end receiving plate (91). A second slide groove (722) is provided on the area of ​​the steering shell (7) opposite to the swing direction of the force-bearing structure (94). A second slider (98) is provided in the second slide groove (722). The force-bearing structure (94) includes an inner rod (942) fixed at one end to the receiving plate (91) and a ball (943) provided at the other end of the inner rod (942). A spring (941) is provided at the end of the second slider (98) near the ball (943). The steering housing (7) is fixed with a rail pressing structure (16), which includes a horizontal rail one (161), a slant rail one (162), a horizontal rail two (163), a slant rail two (164), and a horizontal rail three (165) arranged in sequence. The ball bearings (943) roll on the rail pressing structure (16). The water receiving mechanism (9) also includes a counter-movement structure (96), which includes a gear (962) between two receiving plates (91) in the same set of receiving boxes, and the gear (962) is mounted on a guide rail (95). A rack plate one (961) is mounted on the slider (93) of one of the receiving plates (91), and a rack plate two (963) is mounted on the slider (93) of the other receiving plate (91). Both ends of the steering tube (11) are provided with fixed tubes (111). The steering tube (11) is rotatably mounted on the fixed tubes (111). The fixed tubes (111) are fixed on the conversion bracket (18) by the first fixing frame (13). The second swing arm (15) includes a crossbar (153) fixed to the end of the frame (92), a swing arm (152) located above the crossbar (153), and a collar (151) fixed to the upper end of the crossbar (153). The collar (151) is collinear with the center of the steering tube (11). A fixing ring (14) is provided on the outside of the fixing tube (111), and the fixing ring (14) is fixed on the conversion bracket (18). The collar (151) is rotatably mounted on the fixing ring (14), and the fixing ring (14) is clearance-fitted with the fixing tube (111).

2. The flow rate standard device based on digital twin according to claim 1, characterized in that, The branch pipe (113) is a square pipe, a round pipe or a flat pipe, and the thickness direction of the flat pipe is the same as the swing direction of the X-shaped pipe (112).

3. A flow rate standard device based on digital twin according to claim 1 or 2, characterized in that, The steering shell (7) includes an outer shell (71) and an inner shell (72) located inside the outer shell (71). The outer shell (71) is a short-sleeved structure containing a short tube (711) and a long tube (712). The short tube (711) is used to guide water to the detection water tank (19), and the long tube (712) is used to guide water to the circulating water tank (1). The inner shell (72) is a trouser-shaped structure with equal lengths at both ends. The X-shaped tube (112) swings inside the inner shell (72). Multiple sets of insert tubes (724) are provided at one end of the inner shell (72) near the short cylinder (711). The short cylinder (711) is provided with a drainage structure (8) connected to the insert tubes (724). A hoist (17) for driving the drainage structure (8) to rise and fall is also provided above the steering shell (7).

4. A flow rate standard device based on digital twin according to claim 3, characterized in that, The drainage structure (8) includes: The outer tube (81) is provided with a spiral through groove (811), which is a groove with less than one turn; The inner tube (84) of the superior arc is sleeved in the spiral through groove (811). The upper and lower ends of the inner tube (84) are fixed with limiting rings (82), and the limiting rings (82) are rotatably connected to the outer tube (81). The cannula (724) is inserted into the spiral groove (811).

5. A flow rate standard device based on digital twin according to claim 4, characterized in that, The lower part of the cannula (724) is provided with a spiral block (725) that is compatible with the inner tube (84) of the superior arc.

6. A flow rate standardization method based on digital twins, applicable to the flow rate standardization device based on digital twins as described in any one of claims 1 to 5, characterized in that, Includes the following steps: During the water circulation phase, the horizontal single-stage centrifugal pump (2) pumps the circulating water in the circulating water tank (1) into the testing mechanism, and flows through the standard gauge and the testing gauge. Finally, it flows back into the circulating water tank (1) through the diverting pipe (11) and the diverting housing (7). The water also flows back into the circulating water tank (1) through the fixed pipe (111) and the diverting pipe (11), filling the testing mechanism with water. During the testing phase, the cylinder (20) extends, which simultaneously drives the branch pipe (113) and the second swing arm (15) to swing synchronously. 5) When swinging, it can drive the lower frame (92) to swing. When the frame (92) swings, it drives all the support plates (91) to swing, and then the ball (943) moves from the flat rail (161) to the inclined rail (162) and slides on the inclined rail (162). The inclined rail (162) pushes the inner rod (942) and compresses the spring (941). The support plate (91) at the end slides. Due to the action of the displacement structure (96), the two support plates (91) can close at this time until the ball (943) reaches When the ball bearing (943) reaches the intersection of inclined rail 1 (162) and horizontal rail 2 (163), the receiving plate (91) is completely closed, but has not yet begun to enter the upper part of the detection water tank (19). When the ball bearing (943) slides on horizontal rail 2 (163), the receiving plate (91) begins to enter the upper part of the detection water tank (19) in the closed state. After it has completely entered the upper part of the detection water tank (19), the ball bearing (943) reaches inclined rail 2 (164). At this time, the receiving plate (91) gradually opens, and the water inside enters. The water inside the test tank (19) begins to enter the inner shell (72) on the side opposite to the test tank (19) as the water in the branch pipe (113) enters. This continues until the ball bearing (943) reaches the third flat rail (165). The receiving plate (91) remains open and releases the water inside into the test tank (19). After the test is completed, the cylinder (20) is pushed back to pull back the X-shaped tube (112). At this time, the second swing arm (15) is also pulled back. The water receiving mechanism (9) begins to repeat the above actions in reverse, thus completing one test.

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