Flow standard device and method based on digital twinning

Abstract

The invention discloses a flow standard device and method based on digital twinning, and relates to the technical field of liquid flow devices. The flow standard device based on digital twinning comprises a circulating water tank, a horizontal single-stage centrifugal pump, a surge tank, a detection mechanism, a steering gear and a detection water tank which are sequentially arranged, the steering pipe is located above the steering shell, an X-shaped pipe is arranged below the steering pipe, and branch pipes are arranged at the two lower ends of the X-shaped pipe; according to the flow standard device and method based on digital twinning, the water receiving mechanism is arranged, the water receiving mechanism is rapidly closed when the reversing action starts, the closing time point of the water receiving mechanism is the timing starting time of the timer, and the effectively measured water amount is strictly limited in the time period when the water receiving mechanism is completely closed, so that after the timer starts timing, the water receiving mechanism can be quickly closed. The water flow is received by the water receiving mechanism and flows into the target water tank, so that the accuracy of the detection result is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid flow device, in particular to a flow standard device and method based on digital twinning. BACKGROUND

[0002] The flow standard device based on digital twinning is a professional equipment for calibrating and checking flow meters, which needs to meet the requirements of high precision and high reproducibility, and the core components include fluid source system, standard device, test pipeline, control system, data acquisition system, etc. Through the real-time acquisition of key parameters such as flow, temperature, pressure and vibration of the physical device by the sensor network, combined with fluid mechanics characteristics and geometric structure parameters, a high-fidelity virtual model is constructed to ensure the virtual state and physical state converge at the same rate, and dynamic matching with the physical device is realized.

[0003] The commonly used diverter in the prior art flow standard device based on digital twinning is mainly an open diverter. The open diverter is generally a diverter of pneumatic structure, and such diverter is generally designed as a flat nozzle in order to reduce the time length of the part of the water nozzle flowing into the circulating water tank and the part of the water nozzle flowing into the detection water tank during switching.

[0004] However, the flat nozzle of the diverter has an inherent principle defect in the switching process: it uses the "water flow cutting" method for measurement. In this mode, the "switching time" (t) recorded by the timer is not synchronized with the "effective measurement time" (t') in the true sense that the water flow completely and only flows to the target water tank. Specifically, at the moment (t0) when the timing starts, only the edge of the water flow enters the target water tank, and most of the water body still flows to the original water tank; and at the moment (t1) when the timing ends, the water flow has not been completely switched to the target water tank.

[0005] Therefore, during the entire core measurement period, the water flow is actually in an uncertain "split" or "fork" state. More importantly, the proportion and duration of this split are affected by the coupling of various factors such as the mechanical dynamic performance of the diverter, the flow rate and viscosity of the fluid, resulting in systematic, variable and difficult-to-correct errors, which becomes a bottleneck restricting the improvement of the limit precision of the device. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides a flow standard device and method based on digital twinning, which solves the problem that there is still a part of water flowing into the circulating water tank and another part of water flowing into the detection water tank during switching, resulting in inaccurate detection results.

[0007] To achieve the above object, the application is implemented by the following technical solutions: a flow standard device based on digital twinning, 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 in sequence, wherein the diverter comprises: a diverter shell; a diverter pipe located above the diverter shell, two lower ends of the diverter pipe being provided with branch pipes; a pushing air cylinder mounted on the diverter shell, the pushing air cylinder being capable of pushing the X-shaped pipe to swing in the diverter shell, the length of the branch pipe along the swinging direction thereof being not less than the length perpendicular to the swinging direction thereof; a water receiving mechanism provided below the branch pipe, the pushing air cylinder being capable of driving the water receiving mechanism to swing synchronously with the X-shaped pipe, the water receiving mechanism being capable of being quickly closed when swinging to receive water flow from the branch pipe, and the water receiving mechanism being capable of being automatically opened when the swinging is completed to release the water flow.

[0008] Further, the branch pipe is a square pipe, a circular pipe or a flat pipe, the thickness direction of the flat pipe being the same as the swinging direction of the X-shaped pipe.

[0009] Further, the water receiving mechanism comprises: a receiving box, two groups of receiving boxes being provided, each group of receiving boxes being provided with two receiving plates, the two receiving plates being capable of receiving water flow from the branch pipe when closed; a frame, the frame being a fan-shaped frame structure, guide rails being mounted on both sides of the upper surface of the frame, sliding blocks being mounted on the four corners of the upper surface of the receiving plate through connecting frames, the sliding blocks being capable of sliding on the guide rails; both ends of the frame being provided with second swing arms, the pushing air cylinder being further used to push the second swing arms to swing, so that the frame swings synchronously with the branch pipe.

[0010] Further, a force receiving structure is mounted on the receiving plate at the end, a second sliding groove is provided on the area of the diverter shell opposite to the swinging direction of the force receiving structure, a sliding block two is provided in the second sliding groove, the force receiving structure comprises an inner rod fixed to the receiving plate at one end, a ball provided at the other end of the inner rod, and a spring provided at the end of the sliding block two close to the ball; a pressure rail structure is fixed to the diverter shell, the pressure rail structure comprises a flat rail one, an inclined rail one, a flat rail two, an inclined rail two and a flat rail three arranged in sequence, and the ball rolls on the pressure rail structure.

[0011] Further, the water receiving mechanism further comprises a pair of moving structures, the pair of moving structures comprises a gear between the two receiving plates of the receiving box in the same group, and the gear is mounted on the guide rail, one of the receiving plates is provided with a rack plate one on the sliding block, and the other receiving plate is provided with a rack plate two on the sliding block.

[0012] Further, both ends of the steering pipe are provided with a fixed pipe, the steering pipe is rotatably installed on the fixed pipe, and the fixed pipe is fixed on the conversion support through a first fixing frame; The second swing arm includes a cross rod fixed at the end of the frame, a swing rod arranged above the cross rod, and a sleeve ring fixed at the upper end of the cross rod, the sleeve ring is collinear with the center of the steering pipe, the outer part of the fixed pipe is provided with a fixing ring, the fixing ring is fixed on the conversion support, and the sleeve ring is rotatably installed on the fixing ring.

[0013] Further, the steering shell includes an outer shell and an inner shell inside the outer shell, the outer shell is a pants type structure including a short cylinder and a long cylinder, the short cylinder is used for guiding water to a detection water tank, and the long cylinder is used for guiding water to a circulating water tank; The inner shell is a pants type structure with equal lengths at both ends, the X-shaped pipe swings in the inner shell, one end of the inner shell close to the short cylinder is provided with a plurality of groups of insertion pipes, the short cylinder is provided with a drainage structure connected with the insertion pipes, and the steering shell is further provided with a lifting hoist used for driving the drainage structure to lift and lower.

[0014] Further, the drainage structure includes: An outer pipe, the outer pipe is provided with a spiral through groove, and the spiral through groove is a groove less than one turn; An optimal-arc inner pipe, the optimal-arc inner pipe is sleeved in the spiral through groove, and the upper and lower ends of the optimal-arc inner pipe are fixedly provided with limiting rings rotatably connected with the outer pipe; The insertion pipe is inserted into the spiral through groove.

[0015] Further, the lower part of the insertion pipe is provided with a spiral block matched with the optimal-arc inner pipe.

[0016] On the other hand, the application also provides a flow standard method based on digital twinning, including the following steps: A water circulating stage, in which the horizontal single-stage centrifugal pump pumps the circulating water in the circulating water tank into the detection mechanism, and flows through the standard table and the detection table, and finally flows back into the circulating water tank through the steering pipe and the steering shell, so that the detection mechanism is filled with water; A detection stage, in which the air cylinder is pushed to elongate, the water receiving mechanism and the X-shaped pipe are swung, at the same time, the water receiving mechanism is closed and receives water from the steering pipe, until the steering of the steering pipe is completed, the water receiving mechanism is opened and releases the water in the inside to the detection water tank.

[0017] The application has the following beneficial effects: (1) The flow standard device and method based on digital twinning sets a water receiving mechanism, which is quickly closed at the beginning of the reversing action to form a physical container. The closing time point is the time when the timer starts timing. The effective water quantity is strictly limited within the time period when the water receiving mechanism is completely closed. This makes the water flow received by the water receiving mechanism after the timer starts timing, thereby flowing into the target water tank, significantly improving the accuracy of the detection result. In addition, due to the setting of the water receiving device, the measurement accuracy of the device is no longer limited by the reversing speed of the reverser, the flow rate and viscosity of the fluid.

[0018] (2) The flow standard device and method based on digital twinning sets a liftable drainage structure. In this way, the water is drained into the detection water tank through the drainage structure with adjustable height, which can avoid the evaporation caused by excessive disturbance of the water, and can also avoid occupying the space in the detection water tank.

[0019] Of course, implementing any product of the present application does not necessarily require all the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a whole view of the present application; Figure 2 is a structural schematic view of the detection mechanism of the present application; Figure 3 is a structural schematic view of the reverser of the present application; Figure 4 is an installation schematic view of the lifting hoist of the present application; Figure 5 is a structural schematic view of the inner shell of the present application; Figure 6 is another perspective view of the present application; Figure 5 Figure 7 is an installation schematic view of the reversing pipe of the present application; Figure 8 is a sectional view of the outer shell of the present application; Figure 9 is a structural schematic view of the inner shell of the present application; Figure 10 is an exploded view of the present application; Figure 9 Figure 11 is a schematic view of the branch pipe adopting a flat pipe of the present application; Figure 12 is an assembly view of the second swing arm and the water receiving mechanism of the present application; Figure 13 is a state view of the water receiving mechanism closing of the present application; Figure 14 is a position schematic view of the photoelectric sensor of the present application;​​ Figure 15 For the invention Figure 12 B area of the invention is enlarged view; Figure 16 For the invention is a schematic diagram of the rail structure; Figure 17 For the invention Figure 6 A area of the invention is enlarged view; Figure 18 For the invention is a schematic diagram of the drainage structure installation; Figure 19 For the invention is a diagram of the assembly of the pipe and the spiral block; Figure 20 For the invention is an exploded view of the outer tube and the optimal arc inner tube.

[0021] In the figure, 1, circulating water tank; 2, horizontal single-stage centrifugal pump; 3, pressure stabilizing tank; 4, pump tank drainage pipe; 5, connecting pipe; 6, workshop support; 7, steering shell; 71, outer shell; 711, short cylinder; 712, long cylinder; 72, inner shell; 721, full empty water outlet nozzle; 722, second chute; 723, first chute; 724, pipe; 725, spiral block; 8, drainage structure; 81, outer tube; 811, spiral groove; 82, limiting ring; 83, hanging rod; 84, optimal arc inner tube; 9, water receiving mechanism; 91, receiving plate; 92, frame; 93, sliding block; 94, force receiving structure; 941, spring; 942, inner rod; 943, ball; 95, guide rail; 96, opposite moving structure; 961, rack plate one; 962, gear; 963, rack plate two; 97, connecting frame; 98, sliding block two; 10, manifold pipe; 11, steering pipe; 111, fixed pipe; 112, X-shaped pipe; 113, branch pipe; 114, shielding sheet; 115, photoelectric sensor; 12, bridge-shaped frame; 13, first fixed frame; 14, fixed ring; 15, second swing arm; 151, sleeve ring; 152, swing rod; 153, cross rod; 16, rail 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 support; 19, detection water tank; 20, push cylinder; 21, standard meter front end pipe; 22, standard meter rear end pipe; 23, detection meter front end pipe; 24, detection meter intermediate pipe one; 25, detection meter intermediate pipe two; 26, cylinder section floating pipe; 27, pneumatic control valve; 28, manifold adapter pipe. DETAILED DESCRIPTION

[0022] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present application.

[0023] In the description of the present application, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery" and the like indicate the orientation or positional relationship, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0024] The following is based on Figures 1-20 The flow standard device and method based on digital twinning provided by the embodiments of the present application are described.

[0025] Please refer to Figure 1 The present application provides a technical solution: a flow standard device based on digital twinning, 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 in sequence, the circulating water tank 1 serves as the starting point and the end point of the water circulation of the entire device, the horizontal single-stage centrifugal pump 2 pumps the water in 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 will affect the accuracy of flow detection), the water in the pressure stabilizing tank 3 can be returned 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 conversion of the diverter, and the detection water tank 19 can be weight detection or volume detection.

[0026] Preferably, a start-stop valve is arranged below the detection water tank 19 and extends into the circulating water tank 1, when the detection of the detection water tank 19 is completed, the water in the detection water tank 19 can be introduced into the circulating water tank 1 through the opening of the start-stop valve, facilitating water circulation.

[0027] The detection mechanism is installed on the workshop support 6, a pump tank drainage pipe 4 is arranged between the detection mechanism and the pressure stabilizing tank 3, the detection mechanism comprises a connecting pipe 5 fixedly connected with the pump tank drainage pipe 4, and a standard table front end pipe 21, a standard table rear end pipe 22, a detection table front end pipe 23, a detection table intermediate pipe one 24, a detection table intermediate pipe two 25, a cylinder section floating pipe 26, a pneumatic regulating valve 27, a confluence adapter pipe 28 and a confluence pipe 10 are sequentially arranged in sequence, the confluence pipe 10 is fixed with a fixed pipe 111, the standard table is assembled between the standard table front end pipe 21 and the standard table rear end pipe 22, the detection table is assembled between the detection table intermediate pipe one 24 and the detection table intermediate pipe two 25, and the detection table is also assembled between the detection table intermediate pipe two 25 and the cylinder section floating pipe 26, water flows into the confluence adapter pipe 28 and the confluence pipe 10 through the standard table and the detection table, and then enters the fixed pipe 111.

[0028] As shown in Figures 3-7 As shown in the figure, the diverter comprises a diverter shell 7, a water receiving mechanism 9, a conversion support 18 and a push cylinder 20, the conversion support 18 supports the diverter shell 7 above the circulating water tank 1, an X-shaped pipe 112 is arranged below the diverter pipe 11, two lower ends of the X-shaped pipe 112 are provided with branch pipes 113, the diverter pipe 11 receives water from the detection mechanism, and disperses the water in the diverter pipe 11 into the X-shaped pipe 112 and the branch pipes 113 (the X-shaped pipe 112 and the two branch pipes 113 are arranged to adapt to the water receiving mechanism 9, which will be described below), the push cylinder 20 is installed on the diverter shell 7, the push cylinder 20 can push the X-shaped pipe 112 to swing in the diverter shell 7, and the length of the branch pipe 113 along the swinging direction is not less than the length perpendicular to the swinging direction.

[0029] The water receiving mechanism 9 is arranged 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, and the water receiving mechanism 9 can quickly close when swinging to receive water flow from the branch pipe 113, and the water receiving mechanism 9 can automatically open when the swinging ends to release the water flow.

[0030] As shown in Figures 12-14 The detection of the device uses a photoelectric sensor 115 installed on the diverter shell 7 and a shielding piece 114 at the end of the diverter pipe 11. When the push cylinder 20 receives a signal to start detection and is elongated, the push cylinder 20 is elongated (normally, the branch pipe 113 is aligned with the circulating water tank 1, rather than aligned with the middle part of the diverter shell 7), which synchronously drives two things: pushing the X-shaped pipe 112 and the branch pipe 113 to swing.

[0031] The water receiving mechanism 9 is driven to swing synchronously by the second swing arm 15, and is closed rapidly to form a closed container in the process. The instruction to start the timer is triggered when the water receiving mechanism 9 confirms that it has been completely closed, i.e. the ball 943 reaches the intersection of the inclined rail one 162 and the flat rail two 163. This means that at the moment (TO) when the timer starts, the water flow from the branch pipe 113 has been completely blocked inside the water receiving mechanism 9.

[0032] The forward reversing (to the detection water tank 19) process is as follows, Before TO: the water receiving mechanism 9 is gradually closed in the swing, at this time it does not store water.

[0033] At TO: the water receiving mechanism 9 has been completely closed, and the timer officially starts, at this time the water flow dynamics of the entire waterway system no longer affects the timing reference.

[0034] After TO: the closed water receiving mechanism 9 carries the water flow and moves to directly above the detection water tank 19.

[0035] After that, the water receiving mechanism 9 will automatically open and inject the water flow stored inside it into the detection water tank 19 in a determined and static release manner.

[0036] The reason why the X-shaped pipe 112 is arranged to disperse the water flow in the turning pipe 11 into two branch pipes 113 is that it 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, which is the direction perpendicular to the swing direction of the X-shaped pipe 112), thereby reducing the size of the device.

[0037] Optionally, the branch pipe 113 is a square pipe, a round pipe (refer to Figure 9 and Figure 10 ) or a flat pipe (refer to Figure 11 ).

[0038] Preferably, the branch pipe 113 is a flat pipe, and the thickness direction of the flat pipe is the same as the swing direction of the X-shaped pipe 112. The installation direction of this flat pipe is essentially opposite to the installation direction of the flat pipe in the prior art. In the prior art, the thickness direction of the flat pipe should be directed to the direction parallel to Figure 11 . This is because it is to reduce the thickness of the water in the turning direction when turning, reduce the time length of the part of the water flow in the branch pipe 113 entering the circulating water tank 1 and the part entering the detection water tank 19, and improve the water inlet accuracy. However, the reason why the flat pipe is assembled into the state shown in Figure 11 is to reduce the opening and closing stroke of the water receiving mechanism 9, and because of the water receiving function of the water receiving mechanism 9, the water will directly enter the inside of the water receiving mechanism 9 when it swings, and there is no state that part of the water enters the circulating water tank 1 and part of the water enters the detection water tank 19. Therefore, the flat pipe designed in this direction is preferred.

[0039] As Figure 12 And Figure 13 The water receiving mechanism 9 mentioned above includes a receiving box, which is provided with two groups, as Figure 13 The state diagram of the two groups of receiving boxes receiving water, Figure 12 The state of both groups of receiving boxes being open, each group of receiving boxes being provided with two receiving plates 91, the receiving plates 91 being arc-shaped plates, three sides being provided with baffles, forming a half-box structure, and the two half-box structures being able to form a hollow receiving box above when being closed, receiving water flow from the branch pipe 113.

[0040] Preferably, the receiving plates 91 are in an inclined state, the closing side of the two receiving plates 91 being lower, and the other side being higher, so that in the unclosed state, the receiving plates 91 do not store water.

[0041] In order to realize the opening and closing action mentioned above, a frame 92 is also provided for the receiving box, the frame 92 being a fan-shaped frame structure, the upper surface of the frame 92 being provided with guide rails 95 on both sides, the upper surface of the receiving plate 91 being provided with sliding blocks 93 at four corners through connecting frames 97, the sliding blocks 93 being able to slide on the guide rails 95, when the opposite sliding blocks 93 on the two receiving plates 91 of the same group of receiving boxes are close to each other, the two receiving plates 91 are closed, a second swing arm 15 is provided at both ends of the frame 92, and 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, so as to achieve the state that the water receiving mechanism 9 follows the branch pipe 113 to receive water.

[0042] In order to realize that the opposite sliding blocks 93 on the two receiving plates 91 of the same group of receiving boxes are close to each other, a force receiving structure 94 and a displacement structure 96 are also provided.

[0043] Specifically, as shown in Figure 10 , Figure 12 , Figure 13 , Figure 15 And Figure 16 The end of the receiving plate 91 is provided with a force receiving structure 94, the area of the steering shell 7 opposite to the swinging direction of the force receiving structure 94 is provided with a second sliding groove 722, the second sliding groove 722 is provided with a sliding block two 98, the force receiving structure 94 includes an inner rod 942 fixed at one end of the receiving plate 91 (the inner rod 942 is able to slide on the sliding block two 98), a ball 943 provided at the other end of the inner rod 942, a spring 941 provided at the end of the sliding block two 98 close to the ball 943, a pressure rail structure 16 fixed on the steering shell 7, the pressure rail structure 16 including a flat rail one 161, an inclined rail one 162, a flat rail two 163, an inclined rail two 164 and a flat rail three 165 arranged in sequence, and the ball 943 rolls on the pressure rail structure 16.

[0044] In the embodiment, a first sliding groove 723 is arranged on the steering shell 7 to avoid the swing of the second swing arm 15. When the second swing arm 15 swings, the lower frame 92 is driven to swing, and when the frame 92 swings, all the receiving plates 91 are driven to swing, and then the ball 943 moves from the flat rail one 161 to the inclined rail one 162 and slides on the inclined rail one 162. The inclined rail one 162 pushes the inner rod 942 and compresses the spring 941, and the end receiving plate 91 slides. Due to the action of the moving structure 96, at this time, the two receiving plates 91 can be closed, and when the ball 943 reaches the junction of the inclined rail one 162 and the flat rail two 163, the receiving plate 91 is completely closed, and the receiving plate 91 has not yet begun to enter the upper part of the detection water tank 19 (equivalent to the time for the ball 943 to move on the inclined rail one 162 in the prior art is the time for the receiving plate 91 to be gradually closed, and when the ball 943 reaches the junction of the inclined rail one 162 and the flat rail two 163, the timer starts), and when the ball 943 slides on the flat rail two 163, the receiving plate 91 begins to enter the upper part of the detection water tank 19 in a closed state, and after completely entering the upper part of the detection water tank 19, the ball 943 reaches the inclined rail two 164, at this time, the receiving plate 91 is gradually opened, and the water in it enters the inside of the detection water tank 19. The water in the branch pipe 113 also begins to enter the detection water tank 19, and until the ball 943 reaches the flat rail three 165, the receiving plate 91 maintains opening, the branch pipe 113 fills water into the detection water tank 19, and until the required water amount is reached, the air cylinder 20 pulls back the X-shaped pipe 112, at this time, the second swing arm 15 also begins to be pulled back, and the water receiving mechanism 9 starts to reversely repeat the above-mentioned action, so that the device completes one detection.

[0045] Preferably, rubber pads are arranged on the abutting surfaces of the two receiving plates 91, which can play a sealing role and buffer the state caused by the rapid closing of the two receiving plates 91.

[0046] The above-mentioned moving structure 96 includes a gear 962 between the two receiving plates 91 of the receiving box in the same group, and the gear 962 is installed on the guide rail 95. A rack plate one 961 is installed on the slider 93 of one of the receiving plates 91, and a rack plate two 963 is installed on the slider 93 of the other receiving plate 91.

[0047] In the embodiment, when the end receiving plate 91 moves, the rack plate one 961 is driven to move, so that the gear 962 rotates, and then drives the rack plate two 963 to move, so as to realize the action of the two opposite sliders 93 relatively close or far away, and then realize the opening and closing action of the receiving plate 91.

[0048] In order to facilitate the installation of the steering pipe 11, both ends of the steering pipe 11 in the embodiment of the application are provided with fixed pipes 111, the steering pipe 11 is rotatably installed on the fixed pipe 111, and the fixed pipe 111 is fixed on the conversion support 18 through the first fixing frame 13, so that when the push cylinder 20 applies a pushing force, the steering pipe 11 can rotate by a required angle on the conversion support 18.

[0049] As shown in Figure 9 , Figure 10 , Figure 12 and Figure 17 , the second swing arm 15 is additionally arranged instead of directly fixing the frame 92 on the branch pipe 113, in order to avoid the shaking of the branch pipe 113 caused by the resistance of the water receiving mechanism 9. Specifically, the second swing arm 15 comprises a horizontal rod 153 fixed at the end of the frame 92, a swing rod 152 arranged above the horizontal rod 153, and a sleeve ring 151 fixed at the upper end of the horizontal rod 153, the sleeve ring 151 is collinear with the center of the steering pipe 11, the outer part of the fixed pipe 111 is provided with a fixed ring 14, and the fixed ring 14 is fixed on the conversion support 18, the sleeve ring 151 is rotatably installed on the fixed ring 14, the fixed ring 14 is in clearance fit with the fixed pipe 111, and thus the fixed ring 14 does not contact the fixed pipe 111 and does not directly transmit vibration, thereby ensuring the stability of the fixed pipe 111 and the steering pipe 11 and ensuring the stable action of the shielding piece 114.

[0050] Since in actual work, the legs of the trousers type steering shell 7 should be long and short, the long leg is aligned with the circulating water tank 1, and the short leg is aligned with the detection water tank 19, this kind of mode has certain defects, that is, when the water enters the detection water tank 19 from the short leg, the internal fluctuation is large and easy to evaporate, which leads to inaccurate detection results, but if the leg above the detection water tank 19 is also set as a long leg, it will occupy the internal space of the detection water tank 19, and in the volume detection mode, it will cause a large influence, therefore, in the application, as shown in Figures 4-6 and Figures 18-20As shown, the diversion shell 7 comprises an outer shell 71 and an inner shell 72 inside the outer shell 71, the outer shell 71 is in the form of a pair of trousers comprising a short tube 711 for guiding water to the detection water tank 19 and a long tube 712 for guiding water to the circulating water tank 1; the inner shell 72 is in the form of a pair of trousers with equal length at both ends (one side close to the circulating water tank 1 is a full hollow water outlet nozzle 721, and the other side close to the detection water tank 19 is a water outlet nozzle with a spout 724), the X-shaped pipe 112 swings in 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 is provided with a plurality of spouts 724 at one end close to the short tube 711, the short tube 711 is provided with a drainage structure 8 connected with the spout 724, and the diversion shell 7 is further provided with a lifting hoist 17 above for driving the drainage structure 8 to lift (specifically, a bridge-shaped frame 12 is installed above the outer shell 71, and the lifting hoist 17 is assembled on the bridge-shaped frame 12), the drainage structure 8 does not contact the water in the detection water tank 19 at all times, and is provided with a proximity sensor, when the proximity sensor detects that the liquid level in the detection water tank 19 rises to a distance of 8-15 cm from the drainage structure 8, the proximity sensor controls the lifting hoist 17 to lift the drainage structure 8 through the controller, and the water is drained into the detection water tank 19 in this way of the drainage structure 8 with adjustable height, which can avoid the evaporation caused by too large disturbance of water, and can avoid occupying the space in the detection water tank 19.

[0051] It should be noted that the first sliding groove 723 and the second sliding groove 722 are both provided on the inner shell 72, and the pressing rail structure 16 is fixed between the inner shell 72 and the outer shell 71.

[0052] Specifically, the drainage structure 8 comprises an outer pipe 81 and an optimal-arc inner pipe 84, the outer pipe 81 is provided with a spiral groove 811, the spiral groove 811 is a groove less than one turn, the optimal-arc inner pipe 84 is sleeved in the spiral groove 811, the upper and lower ends of the optimal-arc inner pipe 84 are both fixedly provided with a limiting ring 82, the limiting ring 82 is rotationally connected with the outer pipe 81, a plurality of limiting rings 82 are fixedly provided with a hoisting rod 83 at the upper ends thereof, the bridge-shaped frame 12 is provided with a guide groove for guiding the hoisting rod 83, the lifting hoist 17 can directly lift the hoisting rod 83, and the spout 724 is inserted into the spiral groove 811.

[0053] The optimal-arc inner pipe 84 is used for blocking the area of the spiral groove 811 except the area opposite to the spout 724, so that the outer pipe 81 can guide the liquid downward without water leakage, and the liquid is prevented from leaking out of the spiral groove 811.

[0054] In the embodiment, when the lifting hoist 17 lifts the hoisting rod 83, the entire drainage structure 8 rises, and the spout 724 is always located in the spiral groove 811, due to the limiting effect of the spout 724 and the spiral groove 811, the outer pipe 81 also rotates in the rising process, so as to ensure that the spout 724 enters the optimal-arc inner pipe 84.

[0055] Further, the lower part of the cannula 724 is provided with a spiral block 725 matched with the optimal arc inner tube 84, so as to block the position where the spiral channel 811 meets the hollowed area of the optimal arc inner tube 84, and avoid water leakage at the position.

[0056] In use (in working condition), the horizontal single-stage centrifugal pump 2 pumps the circulating water in the circulating water tank 1 into the detection mechanism, and flows through the standard meter and the detection meter, and finally flows back to the circulating water tank 1 through the turning pipe 11 and the turning shell 7, and the water flows back to the inside of the circulating water tank 1 through the fixed pipe 111 and the turning pipe 11, so that the detection mechanism is filled with water. When detection is performed, the air cylinder 20 is pushed to elongate, which synchronously pushes the branch pipe 113 and the second swing arm 15 to swing synchronously. When the second swing arm 15 swings, the lower frame 92 can be swung, and when the frame 92 swings, all the receiving plates 91 are swung, and then the ball 943 reaches the inclined rail one 162 from the flat rail one 161 and slides on the inclined rail one 162. The inclined rail one 162 pushes the inner rod 942 and compresses the spring 941, and the end receiving plate 91 slides. Due to the effect of the moving structure 96, at this time, the two receiving plates 91 can be closed, until the ball 943 reaches the junction of the inclined rail one 162 and the flat rail two 163, at this time, the receiving plate 91 is completely closed, and the receiving plate 91 has not yet started to enter the upper part of the detection water tank 19. When the ball 943 slides on the flat rail two 163, the receiving plate 91 starts to enter the upper part of the detection water tank 19 in a closed state, and after completely entering the upper part of the detection water tank 19, the ball 943 reaches the inclined rail two 164, at this time, the receiving plate 91 is gradually opened, and the water in it enters the inside of the detection water tank 19, and the water in the branch pipe 113 also starts to enter the side opposite to the detection water tank 19 in the inner shell 72, until the ball 943 reaches the flat rail three 165, the receiving plate 91 maintains opening, and the water flow enters the optimal arc inner tube 84 from the cannula 724. When the proximity sensor detects that the liquid level rises to a distance of 8-15 cm from the drainage structure 8, the proximity sensor controls the controller to control the lifting of the drainage structure 8 by the lifting hoist 17. In this way, the drainage structure 8 with adjustable height drains water into the detection water tank 19, which can avoid the evaporation caused by too large disturbance of water, and can avoid occupying the space in the detection water tank 19, and the cooperation of the outer pipe 81 with the spiral channel 811 and the optimal arc inner tube 84 can ensure that the entire drainage structure 8 does not leak water and guides water downward until the required water amount is reached.

[0057] The air cylinder 20 pulls back the X-shaped pipe 112, at this time, the second swing arm 15 also starts to be pulled back, and the water receiving mechanism 9 starts to reversely repeat the above-mentioned action, so that the device completes one detection.

[0058] On the other hand, the embodiment of the present application also provides a flow standard method based on digital twinning, comprising the following steps: Water circulation stage, horizontal single-stage centrifugal pump 2 pumps the circulating water in circulating water tank 1 into the detection mechanism, and flows through the standard table and the detection table, and finally flows back into the circulating water tank 1 through the turning pipe 11 and the turning shell 7, so that the detection mechanism is filled with water; Detection stage, push the cylinder 20 to elongate, push the water receiving mechanism 9 and the X-shaped pipe 112 to swing, at the same time, the water receiving mechanism 9 closes and receives water from the turning pipe 11, until the turning pipe 11 turns to completion, the water receiving mechanism 9 opens and releases the internal water to the detection water tank 19.

[0059] To design a high-standard flow standard device, it must rely on advanced technology and methods. The development of new generation information communication technology has given birth to the concept of digital twinning. Based on digital twinning, a digital model of the product can be virtually constructed, and simulation testing can be performed to effectively improve the reliability of the product. Digitizing the development of flow standard devices is the technical development direction of new standard devices.

[0060] It should be noted that, in this text, 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. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0061] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details and do not limit the application to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application 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 it swings to receive the water flow from the branch pipe (113). The water receiving mechanism (9) can automatically open after the swing ends to release the water flow.

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. The flow rate standard device based on digital twin according to claim 1, characterized in that, 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.

4. A flow rate standard device based on digital twin according to claim 3, characterized in that, 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).

5. A flow rate standard device based on digital twin according to claim 4, characterized in that, The water receiving mechanism (9) also includes a shifting 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).

6. A flow rate standard device based on digital twin according to claim 3, characterized in that, 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).

7. A flow rate standard device based on digital twin according to any one of claims 1-6, 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).

8. A flow rate standard device based on digital twin according to claim 7, 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).

9. A flow rate standard device based on digital twin according to claim 8, 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.

10. 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 9, characterized in that, Includes the following steps: 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. 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).

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