A vortex flowmeter provided with a piezoelectric sensor and a flow detection method thereof

Abstract

The application provides a vortex flowmeter provided with a piezoelectric sensor and a flow detection method thereof, which comprises a valve pipe, a rotating shaft arranged on the valve pipe, an impeller arranged on the rotating shaft, an electromagnetic induction component arranged on the valve pipe, a display arranged on the valve pipe, and a fixing device arranged on the valve pipe; the fixing device comprises a fixing sleeve arranged on the valve pipe, a rotating bearing arranged on the end of the rotating shaft, a fixing ring arranged on the end of the rotating shaft, an abutting piece movably arranged on the outside of the fixing sleeve, a driving device arranged on the fixing sleeve, an abutting ball arranged on the fixing sleeve, and a sliding ball arranged on the end of the rotating shaft, wherein the abutting ball and the sliding ball can slide, the abutting ball and the abutting piece are associated with the driving device, and the driving device can drive the abutting ball and the abutting piece to move in opposite directions.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of flow measuring equipment, and particularly relates to a turbine flowmeter and a group for measuring at least one flow characteristic. BACKGROUND

[0002] In the use process of the turbine flowmeter, the smaller the contact area between the rotating shaft and the part in contact with the rotating shaft, the smaller the friction, and the higher the sensitivity. In the existing fixing scheme, cooperation is carried out through bearings. The sensitivity of the vortex flowmeter and the friction during the rotation of the rotating shaft have a great relationship. The higher the friction, the lower the sensitivity of the vortex flowmeter, and the smaller the result precision that can be measured. In the existing flowmeter, the bearing cooperation mode causes high rotating friction, which affects the precision. SUMMARY

[0003] The present application is aimed at the deficiencies of the prior art, and provides a vortex flowmeter provided with a piezoelectric sensor and a flow detection method thereof.

[0004] The application provides the following technical scheme: a vortex flowmeter provided with a piezoelectric sensor, comprising a valve pipe, a rotating shaft arranged on the valve pipe, an impeller arranged on the rotating shaft, an electromagnetic induction assembly arranged on the valve pipe, a display arranged on the valve pipe, and a fixing device arranged on the valve pipe; the fixing device comprises a fixing sleeve arranged on the valve pipe, a rotating bearing arranged at the end of the rotating shaft, a fixing ring arranged at the end of the rotating shaft, an abutting piece movably arranged outside the fixing sleeve, a driving device arranged on the fixing sleeve, an abutting ball arranged on the fixing sleeve, and a sliding ball arranged at the end of the rotating shaft, wherein the abutting ball and the sliding ball are both slidable, the abutting ball and the abutting piece are both associated with the driving device, and the driving device can drive the abutting ball and the abutting piece to move in opposite directions; the abutting ball is provided with a pressure sensor; the display is provided with a hinged cover, and the hinged cover is provided with a cleaning device; the cleaning device comprises a longitudinal groove arranged on the hinged cover, a cleaning brush slidingly arranged in the longitudinal groove, a first elastic member connected with the cleaning brush, a stopper connected with the first elastic member, and a driving device for pulling the cleaning brush to reset, wherein one end of the cleaning brush is inserted into the longitudinal groove and abuts against the end surface of the display, the other end of the cleaning brush is provided with a connecting baffle, and the connecting baffle is connected with the first elastic member; the driving device comprises a power tooth connected with a hinged shaft on the hinged cover, a clutch tooth meshing with the power tooth, a driven tooth connected with the clutch tooth, a pull rope wound on the driven tooth, a transmission assembly for driving the clutch tooth to move back and forth, and a fixing structure for fixing the hinged cover; the transmission assembly and the fixing structure are arranged in a matched state, when the transmission structure pushes the clutch tooth, the driven tooth I and the power tooth to disengage, under the pulling of the first elastic member, the cleaning brush moves downward, and then the cleaning brush disengages the fixing mechanism, and after the fixing mechanism is disengaged, the transmission tooth is pushed to reset, so that when the hinged cover is turned up upwardly, the driven tooth can be driven to rotate.

[0005] The application drives the abutting ball and the abutting piece to move in opposite directions through the driving device, so that when the abutting piece seals the bearing, the abutting ball and the movable ball are separated, and when the movable ball and the abutting ball are in contact, the abutting piece and the fixing ring are separated, so that the friction of the fixed part of the rotating shaft can be changed according to different measuring media.

[0006] The application arranges the pressure sensor on the part where the abutting ball and the movable ball are in contact with each other, can measure the change of the axial pressure of the rotating shaft and the size of the pressure of the contact part of the abutting ball when they are connected with each other, so that the friction of the rotating shaft in the rotating process can be calculated, and then the final result measured by the electromagnetic assembly is corrected through the compensation equation of the friction, so that more accurate measurement result can be obtained.

[0007] 2. The cleaning device provided in this invention can guide the cleaning brush to wipe the entire mirror surface of the display before each opening of the hinge cover, effectively preventing fogging from affecting the reading.

[0008] 3. At the same time, the power to reset the cleaning brush comes from the force of flipping the hinged cover upwards. Therefore, in actual use, the reset is simple and can ensure the continuous operation of the entire device.

[0009] Optionally, the end of the abutment member is provided with multiple wedge-shaped sealing blocks, and multiple fixing rings are provided, with annular grooves formed between the multiple fixing rings, and the sidewalls of the fixing rings are inclined.

[0010] Optionally, the driving device includes a connecting post connected to the abutment member, a ring sleeve disposed on the fixed sleeve, a first driving ring connected to the connecting post, a rotating sleeve sleeved on the fixed sleeve, an abutment post disposed on the rotating sleeve, a second driving ring disposed on the fixed sleeve, a fixed frame connected to the second driving ring, an abutment plate disposed on the fixed sleeve, a first spring disposed on the abutment plate, and a limiting component disposed on the inner wall of the fixed sleeve.

[0011] Optionally, the abutting ball is rotatably mounted at the end of the fixed frame, and a second spring is sleeved on the connecting post. One end of the second spring abuts against the first driving ring, and the other end abuts against the ring sleeve. The connecting post passes through the ring sleeve.

[0012] Optionally, the first drive ring and the second drive ring are provided with shallow grooves and deep grooves with arc-shaped inner walls, and the connecting inner walls of the shallow grooves and deep grooves are arc-shaped.

[0013] Optionally, the limiting component includes a fixing ring plate disposed at the end of the fixing frame, a notch or groove disposed on the inner wall of the fixing sleeve, a limiting block disposed in the notch or groove, a third spring connected to the limiting block, and a reset component for driving the limiting block to reset.

[0014] Optionally, the reset assembly includes a connecting frame disposed on the limiting block, a toggle block disposed in the notch groove, and a toggle block disposed in the notch groove; the rotating sleeve is provided with a notch, and the toggle block disengages from the notch; the toggle block is provided with slots arranged in opposite directions, the connecting frame is partially inserted into one slot, and the toggle block is partially inserted into the other slot; the toggle block is provided with a toggle part, and the inner wall of the slot is provided with an arc-shaped part.

[0015] Optionally, the transmission assembly comprises a first fixed shaft fixedly arranged at the end of the display, a driving piece slidingly arranged on the first fixed shaft, a connecting rod for connecting the driving piece and the transmission gear, a first transmission rod arranged on the driving piece, a transmission body arranged at the edge of the display, a cavity arranged in the transmission body, and a second transmission rod slidingly arranged in the cavity.

[0016] Optionally, the fixing structure comprises a connecting plate arranged on the display, a second elastic member connected with the connecting plate, a pushing block connected with the second elastic member, and a guide rod arranged on the pushing block; an association assembly is further arranged on the display, and the association assembly is used for associating the fixing structure and the transmission assembly; the association assembly comprises a first connecting rod arranged on the second transmission rod, an abutting block arranged on the first connecting rod, a third elastic member connected with the abutting block, a second connecting rod connected with the abutting block, a through slot arranged on the first connecting rod, a pivoting rod arranged in the through slot, a fixed block arranged on the first connecting rod, a limiting block arranged on the display, a fourth elastic member connected with the limiting block, and a first pushing block and a second pushing block respectively arranged at two ends of the connecting baffle; wherein the pushing block and the abutting block correspond to each other, the abutting block is provided with a convex part, the second connecting rod is provided with a pressing block, the pressing block and the second pushing block correspond to each other, and the first pushing block and the pushing block correspond to each other.

[0017] The second object of the application provides a flow detection method, which uses a vortex flowmeter provided with a piezoelectric sensor to measure the flow:

[0018] S1: the abutting mode of the fixing device and the rotating shaft is adjusted according to the fluid property; when the fluid contains solid particles, the sealing property between the rotating shaft and the fixing device is high; when the fluid is relatively pure, the rotating shaft and the fixing device are in abutment through two balls;

[0019] S2: the pressure between the sliding ball and the abutting ball arranged on the abutting ball is obtained, so as to obtain the range of the friction force between the mutual contact parts of the sliding ball and the abutting ball, and the flow is corrected;

[0020] S3: when reading, the second connecting rod is pushed, and when the connecting baffle moves to the bottom end of the hinged cover, the hinged cover is flipped upward; at this time, the surface of the display has been cleaned once by the cleaning brush.

[0021] The application can separate the abutting ball and the movable ball when the abutting member seals the bearing, and separate the abutting member and the fixed ring when the movable ball and the abutting ball are in contact, so as to change the friction force of the fixed part of the rotating shaft according to different measuring media.

[0022] The cleaning device provided in this invention can guide the cleaning brush to wipe the entire mirror surface of the display before each opening of the hinge cover, effectively preventing fogging from affecting the readings during reading.

[0023] Meanwhile, the power to reset the cleaning brush comes from the force of flipping the hinged cover upwards, so in actual use, resetting is simple and can ensure the continuous operation of the entire device. Attached Figure Description

[0024] Figure 1 This is a perspective view of the present invention.

[0025] Figure 2 for Figure 1 The sectional view in the image.

[0026] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0027] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0028] Figure 5 for Figure 1 Exploded view after the valve tube has been removed.

[0029] Figure 6 for Figure 5 Enlarged view of point C in the middle.

[0030] Figure 7 for Figure 1 Exploded view of the reset component.

[0031] Figure 8 for Figure 7 A 3D diagram.

[0032] Figure 9 for Figure 8 Enlarged view of point D in the middle.

[0033] Figure 10 for Figure 9 Enlarged view of point E in the middle.

[0034] Figure 11 for Figure 9 Enlarged view of point F in the middle.

[0035] Figure 12 for Figure 11 Enlarged view of point G in the middle.

[0036] Figure 13 for Figure 9 The front view in the image.

[0037] Figure 14 for Figure 13 Enlarged view of section H in the middle.

[0038] Figure 15 For Figure 14 Enlarged view at I.

[0039] Figure 16 For Figure 14 Enlarged view at J.

[0040] Figure 17 For Figure 13 Sectional view at A-A.

[0041] Figure 18 For Figure 17 Enlarged view at K. DETAILED DESCRIPTION

[0042] In order to make the personnel in the technical field better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application.

[0043] Reference Figures 1-17 A vortex flowmeter provided with a piezoelectric sensor and a flow detection method thereof, comprising a valve pipe 1, a rotating shaft 2 provided on the valve pipe 1, an impeller 21 provided on the rotating shaft 2, an electromagnetic induction assembly provided on the valve pipe 1, a display 22 provided on the valve pipe 1, a fixing device provided on the valve pipe 1, and a pressure sensor provided on the valve pipe 1. Wherein, the pressure sensor can measure the hydraulic pressure of the fluid in the valve pipe 1.

[0044] The rotating shaft 2 is rotationally arranged in the valve pipe 1 through the fixing device, the electromagnetic induction assembly is associated with the impeller 21, and the impeller cuts the magnetic induction lines to generate an induced current in the rotating process, so that the flow through the valve pipe can be measured through the electromagnetic induction assembly; the content of this part is prior art; the display 22 is arranged on the valve pipe 2, and the display 22 is associated with the electromagnetic induction assembly.

[0045] In the use process of the turbine flowmeter, the smaller the contact area between the rotating shaft 2 and the part in contact with the rotating shaft 2, the smaller the friction, and the greater the sensitivity can be obtained, but in the process of flow measurement, the rotating shaft 2 will be subjected to the axial force of the impeller shaft and the impact force of the fluid, so that the rotating shaft 2 and the supporting part cause greater resistance.

[0046] At the same time, different fluids also have different effects on the rotating shaft 2 and the supporting part. If the gas containing solid particles is measured, the sealing between the rotating shaft 2 and the supporting bearing needs to be avoided to prevent the solid particles from entering the gap between the rotating shaft 2 and the supporting part; if the gas is measured, the requirement for the sealing between the rotating shaft 2 and the supporting bearing is lower.

[0047] To this end, the application reduces the friction by setting the ball at the end of the rotating shaft 2 and making the rotating shaft 2 and the contact part point contact.

[0048] Specifically, the fixing device comprises a fixing sleeve 31 arranged on the valve pipe 1, a rotating bearing 32 arranged at the end of the rotating shaft 2, a fixing ring 33 arranged at the end of the rotating shaft 2, an abutting piece 34 movably arranged outside the fixing sleeve 31, a driving device arranged on the fixing sleeve 31, an abutting ball 35 arranged on the fixing sleeve 31, and a sliding ball 22 arranged at the end of the rotating shaft 2, wherein the abutting ball 35 and the sliding ball 22 can slide, the abutting ball 35 and the abutting piece 34 are associated with the driving device, and the driving device can drive the abutting ball 35 and the abutting piece 34 to move in opposite directions, that is, when the abutting piece 34 and the fixing ring 33 abut, the abutting ball 35 moves away from the sliding ball 22.

[0049] Specifically, the end of the abutting piece 34 is provided with a plurality of sealing blocks 340 arranged in a wedge shape, the fixing ring 33 is provided with a plurality of ring grooves formed between the plurality of fixing rings 33, and the side wall of the fixing ring 33 is arranged in an inclined manner, so that when the abutting piece 34 is pressed down, the sealing blocks 340 are inserted into the ring grooves, and then the sealing blocks 340 can seal the rotating shaft 32, and the rotating shaft 32 is arranged between the rotating shaft 2 and the fixing sleeve 31 to ensure that the rotating shaft 2 and the fixing sleeve 31 can rotate.

[0050] Further, the fixing sleeve 31 is connected to the valve pipe 1, and the fixing sleeve 31 can have slight movement, so that the fixing sleeve 31 can abut against the bearing 32, or the fixing sleeve 31 can abut against the sliding ball 22.

[0051] The driving device comprises a connecting column 341 connected to the abutting piece 34, a ring sleeve 342 arranged on the fixing sleeve 31, a first driving ring 343 connected to the connecting column 341, a rotating sleeve 344 sleeved on the fixing sleeve 31, an abutting column 345 arranged on the rotating sleeve 344, a second driving ring 321 arranged on the fixing sleeve 31, a fixing frame 322 connected to the second driving ring 321, an abutting plate 323 arranged on the fixing sleeve 31, a first spring 324 arranged on the abutting plate 323, and a limiting assembly arranged on the inner wall of the fixing sleeve 31.

[0052] The abutting ball 35 is arranged at the end of the fixing frame 322, the connecting column 341 is sleeved with a second spring 3420, one end of the second spring 3420 abuts against the first driving ring 343, and the other end abuts against the ring sleeve 342, and the connecting column 341 penetrates through the ring sleeve 342.

[0053] Further, the first driving ring 343 and the second driving ring 321 are provided with arc-shaped shallow grooves 3411 and deep grooves 3412, and the connecting inner walls of the shallow grooves 3411 and the deep grooves 3412 are arc-shaped.

[0054] The upper end and the lower end of the rotating sleeve 344 are provided with abutting columns 345, and when the abutting column 345 provided on the upper end of the rotating sleeve 344 abuts against the deep groove 3412 of the second driving ring 321, the abutting column 345 of the lower end of the rotating sleeve 344 abuts against the shallow groove 3411 of the first driving ring 343. In this way, the first driving ring 343 and the second driving ring 321 can be driven to move in opposite directions by rotating the rotating sleeve 344.

[0055] Further, the abutting plate 323 is provided with a hole, the end portion of the fixing frame 322, which clamps the abutting ball 35, passes through the hole 3221, one end of the first spring 324 abuts against the fixing frame 322, and the other end abuts against the abutting plate 323. In this way, under the pushing of the first spring 342, the abutting ball 35 can abut against the sliding ball 22. However, the elastic force provided by the first spring 342 is not stable.

[0056] Therefore, the application further provides a limiting assembly to fix the fixing frame 322 after the abutting ball 35 abuts against the sliding ball 22.

[0057] The limiting assembly comprises a fixing ring plate 41 provided on the end portion of the fixing frame 322, a notch groove 42 provided on the inner wall of the fixing sleeve 31, a limiting block 43 provided in the notch groove 42, a third spring 44 connected with the limiting block 43, and a reset assembly for driving the limiting block 43 to reset.

[0058] One end of the third spring 44 is connected with the limiting block 43, and the other end is connected with the inner wall of the notch groove 42. The end portion of the limiting block 43 is provided in an inclined manner. In this way, when the abutting ball 35 abuts against the sliding ball 22, the limiting block 43 can fix the fixing frame 322, and when it is necessary to unlock, the limiting block 43 needs to be retracted.

[0059] The reset assembly 43 is used to drive the limiting block 43 to retract.

[0060] Specifically, the reset assembly comprises a connecting frame 431 provided on the limiting block 43, a pushing arc block 432 provided in the notch groove 42, and a pushing block provided in the notch groove 42.

[0061] The rotating sleeve 344 is provided with a notch 3441, and the push block 433 is pulled out from the notch 3441. The push arc block 432 is provided with oppositely arranged grooves 4321, and the connecting frame 431 is partially clamped into one of the grooves 4321, and the push block 433 is partially clamped into the other groove 4321. The push block 433 is provided with a push part 4331, and the inner wall of the groove 4321 is provided with an arc part 4322. Thus, the push part 4331 and the arc part 4322 are abutted by rotating the push block 433, so as to pull the stop block 43 back to the original position.

[0062] In summary, the valve group provided by the present application changes the contact between the rotating shaft 2 and the fixing device into point contact by abutting the abutting ball 35 and the sliding ball 22, so as to greatly improve the sensitivity of measurement. Further, the present application is provided with a pressure sensor at the abutting part of the abutting ball 35 and the sliding ball 22, so as to detect the pressure of the abutting part of the abutting ball 35 and the sliding ball 22, and to correct the flow rate according to the pressure change caused by the axial pressure generated by the rotation of the impeller at different flow rates.

[0063] Further, the display 22 is provided with a cleaning device for cleaning the water mist on the display 22 to ensure the cleanliness of the display.

[0064] The display 22 is provided with a hinged cover 221, and the cleaning device is arranged on the hinged cover 221. The cleaning device comprises a longitudinal groove 21a arranged on the hinged cover 221, a cleaning brush 22a slidingly arranged in the longitudinal groove 21a, a first elastic member 23a connected with the cleaning brush 22a, a stop block 24a connected with the first elastic member 23a, and a driving device for pulling the cleaning brush 22a back to the original position. One end of the cleaning brush 22a is inserted into the longitudinal groove 21a and abuts against the end face of the display 22, and the other end is provided with a connecting baffle 221a connected with the first elastic member 23a.

[0065] Further, in order to obtain better maintenance effect, the cleaning brush 22a can be driven to move downward by the driving device before the hinged cover 221 is opened each time, so as to clean the end face of the display 22.

[0066] Further, the driving device comprises a power tooth 32a connected with the hinge shaft on the hinged cover 221, a clutch tooth 33a engaged with the power tooth 32a, a driven tooth 34a connected with the clutch tooth 33a, a pull rope 35a wound on the driven tooth 34a, a transmission assembly for driving the clutch tooth 33a to move back and forth, and a fixing structure for fixing the hinged cover 221.

[0067] Further, the driven tooth 35a is provided with a rotating body 351a, the pull rope 35a is wound on the rotating body 351a, and the pull rope 35a is connected with the connecting baffle 221a. In this way, when the hinged cover 221 is opened upward, the hinge shaft on the hinged cover 221 drives the power tooth 31a to rotate, so that the power tooth 31a drives the rotating body 351a to rotate, and then drives the cleaning brush 22a to move upward. Therefore, in actual design, the transmission assembly and the fixing structure are arranged in a matched state, when the transmission structure drives the clutch tooth 33a and the driven tooth 34a and the power tooth 32a to disengage, under the pulling of the first elastic member 23a, the cleaning brush 22a moves downward, and then the cleaning brush 22a drives the fixing mechanism to disengage, and after the fixing mechanism is pushed away, the transmission tooth 33a is reset, so that when the hinged cover 221 is opened upward, the rotating body 351a can be driven to rotate.

[0068] Specifically, the transmission assembly comprises a first fixed shaft 41a fixedly arranged at the end of the display 22, a driving piece 42a slidingly arranged on the first fixed shaft 41a, a connecting rod 43a for connecting the driving piece 42a and the transmission tooth 33a, a first transmission rod 44a arranged on the driving piece 42a, a transmission body 45a arranged at the edge of the display 22, a cavity arranged in the transmission body 45a, and a second transmission rod 46a slidingly arranged in the cavity.

[0069] Further, one end of the transmission body 45a is arranged at the upper part of the display 22, and the other end extends below the display 22, the first transmission rod 44a and the second transmission rod 46a are both inserted into the cavity of the transmission body 45a, so that the first transmission rod 44a and the second transmission rod 46a can move synchronously. (This part is realized by air pressure or oil pressure, and the transmission of the two rod bodies is a kind of prior art, or it is a simple transmission mode, therefore, the specific structure thereof does not need to be described in detail)

[0070] The fixing structure comprises a connecting plate 441a arranged on the display 22, a second elastic member 442a connected with the connecting plate 441a, a pushing tenon 443a connected with the second elastic member 442a, and a guide rod 444a arranged on the pushing tenon 443a; and an associated assembly is arranged on the display 22, and the associated assembly is used for associating the fixing structure and the transmission assembly.

[0071] The connecting plate 441a is provided with a hole, and the guide rod 444a passes through the hole; and the upper end surface of the pushing tenon 443a is inclined, so that when the hinged cover 221 is folded on the display 22, the hinged cover 221 presses downward the pushing tenon 443a, and then the pushing tenon 443a is pushed, so that the pushing tenon 443a moves away, and then the pushing tenon 443a can fix the hinged cover 221.

[0072] Further, the associated assembly comprises a first connecting rod 51a arranged on the second transmission rod 46a, an abutting block 52a arranged on the first connecting rod 51a, a third elastic member 53a connected with the abutting block 52a, a second connecting rod 54a connected with the abutting block 52a, a through slot 55a arranged on the first connecting rod 51a, a pivoting rod 56a arranged in the through slot 55a, a fixing tenon 57a arranged on the first connecting rod 51a, a limiting tenon 58a arranged on the display 22, a fourth elastic member 59a connected with the limiting tenon 58a, and a first pushing block 5a and a second pushing block 5b arranged at two ends of the connecting baffle 221a respectively.

[0073] The pushing tenon 443a and the abutting block 52a correspond to each other, the abutting block 52a is provided with a convex portion 521a, the second connecting rod 54a is provided with a pressing tenon 541a, the pressing tenon 541a and the second pushing block 5b correspond to each other, and the first pushing block 5a and the pushing tenon 443a correspond to each other.

[0074] Therefore, the above activity principle is described in combination with the drawings.

[0075] In the initial state, the abutting block 52a and the guide rod 444a abut, and the fixing tenon 57a and the limiting tenon 58a are in the same plane.

[0076] When the hinged cover 221 needs to be unfolded:

[0077] First step, pull the second transmission rod 46a, abutment block 52a and guide abutment rod 444a staggered with each other, at this time, the first transmission rod 44a also produces displacement, in turn, transmission teeth 33a and driven teeth 34a are mutually separated, the first elastic piece 23a pulls the cleaning brush 22a, and the mirror surface of the display 22 is cleaned.At the same time, the fixed tenon block 57a and the limiting tenon block 58 cooperate with each other, and the limiting tenon block 58a fixes the fixed tenon block 57a;At this time, the second transmission rod 46a will not produce displacement.

[0078] Second step, when the cleaning brush 22a moves to the bottom end of the longitudinal groove 21a, the first push block 5a and the second push block 5b push the push tenon block 443a and the downward tenon block 541a respectively;So when the guide abutment rod 444a is arranged to move to the side of the abutment block 52a, it will affect the reset of the second transmission rod 46a;Because the second push block 5b pushes the downward tenon block 541a, the second connecting rod 54a moves downward, so that the abutment block 52a and the guide abutment rod 444a stagger with each other.

[0079] Third step, when the second connecting rod 54a moves downward, it will push the lever 56a to move downward, and in turn the other end of the lever 56a is raised, at this time the end of the lever 56a is raised will push the fixed tenon block 57a upward, so that the fixed tenon block 57a and the limiting tenon block 58a stagger with each other.

[0080] At this time, the elastic piece can be arranged to reset the first connecting rod 51a, or manually pull the first connecting rod 51a to reset.

[0081] In summary, the cleaning device arranged in the application can guide the cleaning brush 22a to wipe the mirror surface of the entire display 22 before each time the hinged cover 221 is opened, effectively preventing the influence of fog on reading when reading.

[0082] At the same time, the power to reset the cleaning brush 22a comes from the force to turn the hinged cover 221 upward, so in actual use, the reset is simple and can ensure the continuous operation of the entire device.

[0083] Obviously, the described embodiments are only part of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the application.

Claims

1. A vortex flow meter equipped with a piezoelectric sensor, characterized in that, The device includes a valve tube, a rotating shaft mounted on the valve tube, an impeller mounted on the rotating shaft, an electromagnetic induction component mounted on the valve tube, a display mounted on the valve tube, and a fixing device mounted on the valve tube. The fixing device includes a fixing sleeve mounted on the valve tube, a rotating bearing at the end of the rotating shaft, a fixing ring at the end of the rotating shaft, an abutment movably mounted outside the fixing sleeve, a driving device mounted on the fixing sleeve, an abutment ball mounted on the fixing sleeve, and a sliding ball at the end of the rotating shaft. Both the abutment ball and the sliding ball are slidable. Both the abutment ball and the abutment component are associated with the driving device, which drives the abutment ball and the abutment component to move in opposite directions. Specifically, when the abutment component and the fixing ring abut against each other, the abutment ball moves away from the sliding ball. A pressure sensor is mounted on the abutment ball. The display has a hinged cover, and a cleaning device is mounted on the hinged cover. The cleaning device includes components mounted on the hinged cover. The device comprises a longitudinal groove, a cleaning brush slidably connected within the longitudinal groove, a first elastic element connected to the cleaning brush, a stop connected to the first elastic element, and a drive device for pulling the cleaning brush back to its original position. One end of the cleaning brush is inserted into the longitudinal groove and abuts against the end face of the display. The other end is provided with a connecting baffle, which is connected to the first elastic element. The drive device includes a power tooth connected to the hinge shaft on the hinge cover, a clutch tooth meshing with the power tooth, a driven tooth connected to the clutch tooth, a pull rope wound around the driven tooth, a transmission assembly for driving the clutch tooth to move back and forth, and a fixing structure for fixing the hinge cover. The transmission assembly and the fixing structure are configured to cooperate with each other. When the transmission structure pushes the clutch tooth, driven tooth, and power tooth out of contact, the cleaning brush moves downward under the pull of the first elastic element, thereby disengaging the fixing mechanism. After the fixing mechanism disengages, it pushes the transmission tooth back to its original position, thus enabling the driven tooth to rotate when the hinge cover is flipped upwards.

2. A vortex flow meter equipped with a piezoelectric sensor according to claim 1, characterized in that, The end of the abutment is provided with multiple wedge-shaped sealing blocks, and multiple fixing rings are provided. A ring groove is formed between the multiple fixing rings, and the side wall of the fixing ring is inclined.

3. A vortex flow meter equipped with a piezoelectric sensor according to claim 1, characterized in that, The driving device includes a connecting post connected to the abutting member, a ring sleeve disposed on the fixed sleeve, a first driving ring connected to the connecting post, a rotating sleeve sleeved on the fixed sleeve, an abutting post disposed on the rotating sleeve, a second driving ring disposed on the fixed sleeve, a fixed frame connected to the second driving ring, an abutting plate disposed on the fixed sleeve, a first spring disposed on the abutting plate, and a limiting component disposed on the inner wall of the fixed sleeve.

4. A vortex flow meter equipped with a piezoelectric sensor according to claim 3, characterized in that, The abutting ball is rotatably mounted at the end of the fixed frame, and a second spring is sleeved on the connecting column. One end of the second spring abuts against the first driving ring, and the other end abuts against the ring sleeve. The connecting column passes through the ring sleeve.

5. A vortex flowmeter equipped with a piezoelectric sensor according to claim 3, characterized in that, The first drive ring and the second drive ring are provided with shallow grooves and deep grooves with arc-shaped inner walls, and the connecting inner walls of the shallow grooves and deep grooves are arc-shaped.

6. A vortex flowmeter equipped with a piezoelectric sensor according to claim 3, characterized in that, The limiting component includes a fixing ring plate at the end of the fixing frame, a notch groove on the inner wall of the fixing sleeve, a limiting block in the notch groove, a third spring connected to the limiting block, and a reset component for driving the limiting block to reset.

7. A vortex flowmeter equipped with a piezoelectric sensor according to claim 6, characterized in that, The reset assembly includes a connecting frame disposed on the limiting block, a toggle block disposed in the notch groove, and a toggle block disposed in the notch groove; the rotating sleeve is provided with a notch, and the toggle block disengages from the notch; the toggle block is provided with slots arranged in opposite directions, the connecting frame is partially inserted into one slot, and the toggle block is partially inserted into the other slot; the toggle block is provided with a toggle part, and the inner wall of the slot is provided with an arc-shaped part.

8. A vortex flowmeter equipped with a piezoelectric sensor according to claim 7, characterized in that, The transmission assembly includes a first fixed shaft fixedly disposed at the end of the display, a drive plate slidably disposed on the first fixed shaft, a connecting rod for connecting the drive plate and the transmission gear, a first transmission rod disposed on the drive plate, a transmission body disposed at the edge of the display, a cavity disposed within the transmission body, and a second transmission rod slidably disposed within the cavity.

9. A vortex flowmeter equipped with a piezoelectric sensor according to claim 8, characterized in that, The fixing structure includes a connecting plate on the display, a second elastic element connected to the connecting plate, a pushing tenon connected to the second elastic element, and a guide rod on the pushing tenon. The display also includes an association component for connecting the fixing structure and the transmission component. The association component includes a first connecting rod on the second transmission rod, an abutting block on the first connecting rod, a third elastic element connected to the abutting block, a second connecting rod connected to the abutting block, a through groove on the first connecting rod, a rocker arm rotatably disposed within the through groove, a fixing tenon on the first connecting rod, a limiting tenon on the display, a fourth elastic element connected to the limiting tenon, and a first push block and a second push block respectively disposed at both ends of the connecting baffle. The pushing tenon and the abutting block correspond to each other, the abutting block has a protrusion, the second connecting rod has a pressing tenon, the pressing tenon and the second push block correspond to each other, and the first push block and the pushing tenon correspond to each other.

10. A flow detection method using a vortex flow meter equipped with a piezoelectric sensor as described in claim 9: S1: Adjust the contact mode between the fixed device and the rotating shaft according to the fluid properties. When the fluid contains solid particles, the sealing between the rotating shaft and the fixed device is high; when the fluid is relatively pure, the rotating shaft and the fixed device are connected by two balls. S2: Based on the amount of pressure between the sliding ball and the abutting ball obtained from the pressure set on the abutting ball, the range of friction force at the contact part between the sliding ball and the abutting ball is obtained, and the flow rate is corrected accordingly; S3: When taking the reading, push the second linkage. When the connecting baffle moves to the bottom of the hinge cover, flip the hinge cover upwards. At this time, the cleaning brush has already cleaned the surface of the display once.

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