An anti-blocking V-cone flowmeter

Abstract

The present invention relates to the field of V-cone flowmeters and discloses an anti-blocking V-cone flowmeter, comprising a V-cone sensor and a differential pressure transmitter. The V-cone sensor comprises a measuring pipe, a positive pressure measuring pipe and a negative pressure measuring pipe fixedly connected between the measuring pipe and the differential pressure transmitter, and a conical body fixed to the port of the negative pressure measuring pipe away from the differential pressure transmitter. The port of the negative pressure measuring pipe extends through the entire conical body along the direction of fluid flow. A filter screen is fixed to the inner circumference of the measuring pipe. A cleaning mechanism for cleaning the surface of the filter screen is provided inside the measuring pipe. The cleaning mechanism comprises an active circular ring rotatably mounted between the filter screen and the conical body, a plurality of cleaning scrapers fixed around the outer circumference of the active circular ring, and cleaning bristles provided on the side wall of the cleaning scraper near the filter screen. The present application has the effect of improving the problem of a lot of garbage and impurities accumulating on the surface of the filter plate, thereby clogging the filter holes on the surface of the filter plate.

Description

Technical Field

[0001] The present invention relates to the field of V-cone flowmeters, in particular to an anti-blocking V-cone flowmeter. Background Art

[0002] The V-cone flowmeter is actually a differential pressure flowmeter, which has made a qualitative leap in the field of differential pressure flow measurement. It is a new type of differential pressure flowmeter with high precision and high stability. During the use of the V-cone flowmeter, the negative pressure taking pipe is pressurized through a reflux component connected to the V-cone flowmeter. It is easy for the V-cone flowmeter to retain impurities and cause blockage, thereby affecting the normal use and service life of the flowmeter.

[0003] For example, Chinese utility model patent No. CN210774194U discloses a V-cone flowmeter, comprising a tube body, a V-cone flowmeter body disposed within the tube body, a negative pressure pipe disposed within the left end of the V-cone flowmeter body, the negative pressure pipe being clamped to the upper surface of the tube body, and the right side of the V-cone flowmeter body being fixedly connected to the left side of the base. The V-cone flowmeter body, tube body, base, sieve plate, slider, spring, and clamp are arranged. A worker aligns the filter plate with the base and pushes it leftward into the base, causing the elastic force of multiple springs to squeeze the two sliders, causing the two sliders to respectively drive the two clamping blocks into their respective slots.

[0004] In response to the above-mentioned related technologies, the inventor believes that the impurities retained in the V-cone flowmeter body are effectively blocked on one side by the filter plate, so it is not easy to affect the normal operation of the V-cone flowmeter body; however, after the filter plate surface has been used for a long time, a lot of garbage and impurities will accumulate on the surface, thereby clogging the filter holes on the filter plate surface. Summary of the Invention

[0005] In order to improve the problem that a lot of garbage and impurities accumulate on the surface of the filter plate, thereby clogging the filter holes on the surface of the filter plate, the present application provides an anti-clogging V-cone flowmeter.

[0006] This application provides an anti-blocking V-cone flowmeter, which adopts the following technical solutions:

[0007] A blockage-proof V-cone flowmeter includes a V-cone sensor and a differential pressure transmitter. The V-cone sensor includes a measuring pipe, a positive pressure measuring tube and a negative pressure measuring tube fixedly connected between the measuring pipe and the differential pressure transmitter, and a conical body fixed to the port of the negative pressure measuring tube away from the differential pressure transmitter. The port of the negative pressure measuring tube passes through the entire conical body along the direction of fluid flow. A filter mesh disk is fixed on the inner circumference of the measuring pipe, and a cleaning mechanism for cleaning the surface of the filter mesh disk is provided inside the measuring pipe. It is characterized in that: the cleaning mechanism includes an active ring rotatably installed between the filter mesh disk and the conical body, a plurality of cleaning scrapers fixed around the outer circumference of the active ring, and cleaning bristles provided on the side wall of the cleaning scraper close to the filter mesh disk, and a driving mechanism for driving the active ring to rotate is provided inside the measuring pipe.

[0008] By adopting the above technical solution, when the fluid flows inside the transport pipeline, the fluid first flows into the differential pressure transmitter through the positive pressure measuring tube, so that the differential pressure transmitter can measure the initial value of the fluid before passing through the cone; the fluid then flows through the filter screen and is filtered by the filter screen to obtain a clean fluid, while the impurities contained in the fluid will be retained on the surface of the filter screen; the filtered fluid then enters the negative pressure measuring tube through the port of the assembled measuring tube, and the filtered fluid flows into the differential pressure transmitter through the negative pressure measuring tube. The differential pressure transmitter can measure the final value of the fluid after passing through the cone. The drive mechanism drives several cleaning scrapers to rotate synchronously through the active ring. The cleaning scrapers use cleaning bristles to clean impurities and garbage on the surface of the filter screen.

[0009] Optionally, the driving mechanism includes a spiral blade fixed to the side wall of the active ring close to the negative pressure measuring tube, and the spiral blade is fixed in several circles around the surface of the cone that is in contact with the fluid flow with the axis of the cone as the axial direction.

[0010] By adopting the above technical solution, the fluid flows through the surface of the cone and drives the spiral blades to rotate. The spiral blades drive several cleaning scrapers to rotate synchronously through the active ring. The cleaning scrapers clean impurities and garbage on the surface of the filter screen through the cleaning bristles.

[0011] Optionally, the surface of the filter mesh disk is provided with several collecting mechanisms for collecting impurities contained in the fluid, and the collecting mechanisms include a collecting box installed on the side of the filter mesh disk away from the negative pressure measuring tube, and a detachable component provided on the side of the filter mesh disk away from the negative pressure measuring tube for allowing the collecting box to be detachably installed on the surface of the filter mesh disk, and the collecting box is connected to the overlapping part of the filter mesh disk box.

[0012] By adopting the above technical solution, the cleaning scraper pushes the impurities and garbage on the surface of the filter screen to the opening position of the collection box through the cleaning bristles, and then pushes the impurities and garbage into the inside of the collection box through the thrust generated by the fluid flow. The collection box is disassembled by disassembling parts and the garbage and impurities inside are poured out.

[0013] Optionally, the detachable parts include two guide rail cylinders vertically fixed to the side walls of the collection box body close to the filter mesh disk, and two guide rail slides vertically arranged on the side walls of the filter mesh disk away from the negative pressure measuring tube. The side walls of the two guide rail slides that are close to each other are vertically opened with semicircular grooves, and the semicircular grooves pass through the top and bottom surfaces of the guide rail slides. The guide rail cylinders are clamped to the surface of the filter mesh disk through the semicircular grooves; the top and bottom of the collection box body are both composed of elastic rubber sheets, and the other side walls of the collection box body are surrounded by filter iron mesh.

[0014] By adopting the above technical solution, the left and right side walls of the collection box are manually pressed to shrink the opening of the collection box, thereby taking out the collection box and pouring out the garbage and impurities inside. The guide rail cylinder of the collection box is then placed between the two guide rail slides, and the guide rail slide is clamped in the position between the two guide rail slides through a semicircular groove, so that the collection box is fixed to the side wall of the filter mesh plate away from the negative pressure measuring tube.

[0015] Optionally, several supporting mechanisms for supporting the collection box are vertically arranged inside the collection box, and the supporting mechanisms include two supporting straight rods respectively hinged to the vertical and opposite inner walls of the collection box, and a compression spring fixedly connected between the two supporting straight rods, and the adjacent ends of the two supporting straight rods are hinged to each other.

[0016] By adopting the above technical solution, when the guide rail cylinder of the collection box is placed between the two guide rail slides, the compression spring between the two supporting straight rods drives the collection box to return to its initial state through its own deformation, and the guide rail slide is clamped in the position between the two guide rail slides through the semicircular groove, thereby fixing the collection box to the filter screen away from the side wall of the negative pressure measuring tube.

[0017] Optionally, a cover mechanism for sealing the connecting portion between the collection box and the filter screen is provided inside the measuring pipe, and the cover mechanism includes a covering ring rotatably installed between the filter screen and the conical body and a plurality of covering screens fixed around the outer circumference of the covering ring, and the side walls adjacent to the corresponding two guide rails are vertically provided with a clearance groove, and the clearance groove passes through the bottom surface of the guide rail, and the covering screen can be clamped between the corresponding two guide rails through the clearance groove.

[0018] By adopting the above technical solution, the sealing ring clamps the sealing mesh plate between the two guide rail slides through the give way groove, so that the sealing mesh plate seals the collection groove of the filter mesh plate, thereby minimizing the flow of the fluid inside the transport pipeline, causing garbage and impurities to escape from the collection box through the collection groove.

[0019] Optionally, a transmission mechanism is provided between the covering ring and the active ring so that the active ring pushes the covering ring to rotate, and the transmission mechanism includes ratchet teeth axially arranged on the side surfaces of the covering ring and the active ring close to the axis of the cone, and the two circles of ratchet teeth are symmetrically arranged and mesh with each other.

[0020] By adopting the above technical solution, the spiral blade drives the cover ring to rotate through the friction between the active ring and the inclined surface of the ratchet teeth of the cover ring until the cover ring completely leaves the position between the two guide rails; at this time, the active ring continues to rotate and will not drive the cover ring to rotate, but will cause the cover ring to remain in the current position.

[0021] Optionally, a reset mechanism for resetting the covering ring is provided on the side of the covering ring facing away from the filter mesh disk, and the reset mechanism includes a limiting ring fixed to the side wall of the cone facing away from the negative pressure measuring tube, a hollow shell ring sleeved on the circumference of the limiting ring, a torsion spring fixedly connected between the side wall of the limiting ring and the inner side wall of the hollow shell ring away from the cone, and a plurality of connecting straight rods hinged between the side walls of the covering ring and the hollow shell ring close to each other.

[0022] By adopting the above technical solution, after the fluid flow data detection is completed, the spiral blades stop rotating because the fluid inside the transport pipe no longer flows, and the torsion spring drives the empty shell ring to rotate in the opposite direction through its own deformation. The empty shell ring drives the sealing ring to rotate in the opposite direction through the connecting straight rod, thereby sealing the connected parts.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. When the fluid flows inside the transport pipeline, it first flows into the differential pressure transmitter through the positive pressure measuring tube, allowing the differential pressure transmitter to measure the initial value of the fluid before passing through the cone. The fluid then flows through the filter screen and is filtered by the filter screen to obtain clean fluid, while impurities contained in the fluid will be retained on the surface of the filter screen. The filtered fluid then enters the negative pressure measuring tube through the port of the assembled measuring tube, and the fluid flows into the differential pressure transmitter through the negative pressure measuring tube. The differential pressure transmitter can measure the final value of the fluid after passing through the cone. The driving mechanism drives several cleaning scrapers to rotate synchronously through the active ring. The cleaning scrapers use cleaning bristles to clean impurities and garbage on the surface of the filter screen.

[0025] 2. The cleaning scraper pushes the impurities and garbage on the surface of the filter disc to the opening of the collection box through the cleaning bristles. Then, the thrust generated by the fluid flow pushes the impurities and garbage into the collection box. The collection box is disassembled by disassembling parts and the garbage and impurities inside are poured out.

[0026] 3. The sealing ring clamps the sealing mesh plate between the two guide rails through the clearance groove, so that the sealing mesh plate seals the collection groove of the filter mesh plate, thereby preventing the fluid inside the transport pipeline from no longer flowing and causing garbage and impurities to escape from the collection box through the collection groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of an embodiment of the present application.

[0028] Figure 2 yes Figure 1 Schematic cross-section along line AA.

[0029] Figure 3 It is a structural schematic diagram of the surface of the cone in the embodiment of the present application.

[0030] Figure 4 yes Figure 3 Exploded diagram of the assembled measuring tube with the structure hidden.

[0031] Figure 5 It is a schematic diagram of the structure inside the collection box in the embodiment of the present application.

[0032] Figure 6 It is an exploded schematic diagram of the structure of the rear part of the cone in the embodiment of the present application.

[0033] Reference numerals: 11, V-cone sensor; 12, differential pressure transmitter; 13, measuring pipe; 14, flange ring; 15, assembly through hole; 16, high-pressure side water intake hole; 17, low-pressure side water intake hole; 18, positive pressure measuring tube; 19, negative pressure measuring tube; 20, assembly measuring tube; 21, cone; 22, cutting surface; 23, filter disc; 24, driven ring; 25, active ring; 26, spiral blade; 27, cleaning Sweeping blade; 28. Cleaning brush bristles; 29. Collecting slot; 30. Guide rail slide; 31. Semicircular groove; 32. Collecting box; 33. Guide rail cylinder; 34. Support assembly; 35. Support rod; 36. Compression spring; 37. Covering ring; 38. Ratchet teeth; 39. Limiting ring; 40. Limiting rod; 41. Connecting rod; 42. Empty shell ring; 43. Torsion spring; 44. Covering mesh plate; 45. Give way slot. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-6This application is described in further detail.

[0035] The embodiment of the present application discloses an anti-blocking V-cone flowmeter. Figure 1 The anti-blocking V-cone flowmeter includes a V-cone sensor 11 and a differential pressure transmitter 12. The V-cone sensor 11 includes a measuring pipe 13 and flange rings 14 coaxially fixed to both ends of the measuring pipe 13. The inner diameter of the flange ring 14 is equal to the inner diameter of the measuring pipe 13, and the outer diameter of the flange ring 14 is larger than the outer diameter of the measuring pipe 13. The two opposing sides of the flange rings 14 are both flange surfaces. The adjacent side walls of the two flange rings 14 are each provided with a plurality of assembly holes 15. The assembly holes 15 are axially arranged around the axis of the flange ring 14.

[0036] Reference Figure 1 and Figure 2 A high-pressure side water intake hole 16 and a low-pressure side water intake hole 17 are respectively opened on the periphery of the measuring pipe 13 along the direction of fluid flow. A positive pressure measuring tube 18 is vertically fixed to the periphery of the measuring pipe 13 through the high-pressure side water intake hole 16. A port at one end of the positive pressure measuring tube 18 passes through the measuring pipe 13 through the high-pressure side water intake hole 16 and communicates with the differential pressure transmitter 12. A port at the other end of the positive pressure measuring tube 18 passes through the high-pressure side water intake hole 16 and is disposed within the measuring pipe 13. A negative pressure measuring tube 19 is vertically fixed to the periphery of the measuring pipe 13 through the low-pressure side water intake hole 17. A port at one end of the negative pressure measuring tube 19 passes through the measuring pipe 13 through the low-pressure side water intake hole 17 and communicates with the differential pressure transmitter 12. A port at the other end of the negative pressure measuring tube 19 passes through the low-pressure side water intake hole 17 and is disposed within the measuring pipe 13. An assembly measuring tube 20 is vertically fixed to the periphery of the measuring pipe 13. The assembly measuring tube 20 is disposed within the measuring pipe 13 along the direction of fluid flow. The port at the bottom of the negative pressure measuring tube 19 passes through the circumference of the assembled measuring tube 20. The end of the assembled measuring tube 20 close to the positive pressure measuring tube 18 is a solid cone structure, thereby reducing the resistance encountered by the assembled measuring tube 20 inside the measuring pipe 13.

[0037] Reference Figure 2-4As shown, a cone 21 is coaxially fixed to the circumference of the assembled measuring tube 20. The port of the assembled measuring tube 20 facing away from the negative pressure measuring tube 19 passes through the entire cone 21 along the direction of fluid flow and is connected to the interior of the measuring pipe 13. The side wall of the cone 21 close to the negative pressure measuring tube 19 is a conical structure, and the side wall of the cone 21 facing away from the negative pressure measuring tube 19 is a semi-spherical structure. The portion of the cone 21 close to the conical structure and the semi-spherical structure is cut with a cutting surface 22. A filter screen 23 is coaxially fixed to the inner circumference of the measuring pipe 13. The filter screen 23 is a screen structure with a circular ring-shaped longitudinal cross-section composed of a filter iron mesh. The outer diameter of the filter screen 23 is equal to the inner diameter of the measuring pipe 13, thereby achieving a fit between the outer circumference of the filter screen 23 and the inner circumference of the measuring pipe 13. The inner diameter of the filter mesh disk 23 is larger than the outer diameter of the cutting circumference 22 of the cone 21 , thereby achieving a gap between the filter mesh disk 23 and the cutting circumference 22 of the cone 21 .

[0038] Reference Figure 3 and Figure 4 A driven ring 24 is coaxially mounted on the circumference of the assembly measuring tube 20 near the positive pressure measuring tube 18. A bearing is installed between the inner circumference of the driven ring 24 and the outer circumference of the assembly measuring tube 20, thereby enabling the driven ring 24 to be rotatably mounted on the circumference of the assembly measuring tube 20. A driving ring 25 is installed between the filter screen 23 and the cone 21. Bearings are installed between the inner circumference of the filter screen 23 and the outer circumference of the cone 21, thereby enabling the driving ring 25 to be rotatably mounted between the filter screen 23 and the cone 21. A spiral blade 26 is fixedly connected between the driven ring 24 and the active ring 25 in the length direction of the conical structure of the cone 21. Three cleaning scrapers 27 are fixed to the outer circumference of the active ring 25 with its own axis as the axial direction. The end of the cleaning scraper 27 away from the active ring 25 abuts against the inner circumference of the measuring pipe 13. A row of cleaning bristles 28 are provided on the side wall of the cleaning scraper 27 close to the filter mesh disk 23 along the length direction of the cleaning scraper 27. The end of the cleaning bristles 28 away from the cleaning scraper 27 abuts against the surface of the filter mesh disk 23.

[0039] Reference Figure 4 and Figure 5The filter screen disc 23 has a collecting slot 29 on its surface, and three collecting slots 29 are arranged axially at equal intervals with the axis of the filter screen disc 23 as the center. Two guide rails 30 are vertically arranged on the slot edge of each collecting slot 29 away from the cleaning scraper 27, and the two guide rails 30 are arranged opposite to each other. Semicircular grooves 31 are vertically opened on the side walls of the two guide rails 30 that are close to each other, and the semicircular grooves 31 pass through the top and bottom surfaces of the guide rails 30. A collecting box 32 is provided between the two guide rails 30 on the slot edge of the same collecting slot 29, and the collecting box 32 has an opening near the side wall of the filter screen disc 23. The top and bottom of the collecting box 32 are composed of elastic rubber sheets, and the other side walls of the collecting box 32 are surrounded by filter iron mesh. The side walls of the collection box 32 close to the filter mesh plate 23 are fixed with guide rail cylinders 33 along the two side edges of their own vertical direction. The guide rail cylinders 33 are clamped to the side walls of the filter mesh plate 23 through semicircular grooves 31, so that the collection box 32 is clamped to the surface of the filter mesh plate 23 away from the cleaning scraper 27.

[0040] Reference Figure 4 and Figure 5 Two sets of support assemblies 34 are vertically arranged inside the collection box 32. The support assemblies 34 include two support rods 35 hinged to the two vertical and opposite inner side walls of the collection box 32. A compression spring 36 is fixedly connected between the circumferences of the two support rods 35, and the adjacent ends of the two support rods 35 are hinged to each other. A capping ring 37 is coaxially arranged on the cutting surface 22 of the cone 21. A bearing is installed between the inner circumference of the capping ring 37 and the cutting surface 22 of the cone 21, so that the capping ring 37 can be rotatably installed on the cutting surface 22 of the cone 21. A circle of ratchet teeth 38 is provided on the side of the capping ring 37 close to the active ring 25, with the axis of the cone 21 as the axial direction. The two circles of ratchet teeth 38 are symmetrically arranged and mesh with each other.

[0041] Reference Figure 4 and Figure 6A limiting ring 39 is coaxially disposed on the side of the conical body 21 facing away from the negative pressure measuring tube 19. A limiting straight rod 40 is fixedly connected between the limiting ring 39 and the semi-spherical surface of the conical body 21. Two limiting straight rods 40 are equidistantly spaced about the axis of the conical body 21. A hollow ring 42 is coaxially disposed on the side of the limiting ring 39 facing away from the conical body 21. The hollow ring 42 has a cavity defined within it and an opening formed near the sidewall of the conical body 21. The hollow ring 42 is sheathed around the limiting ring 39 through its opening. A connecting straight rod 41 is provided between the side walls close to the covering ring 37 and the empty shell ring 42. The end of one end of the connecting straight rod 41 is hinged to the side wall of the covering ring 37 facing away from the empty shell ring 42, and the end of the other end of the connecting straight rod 41 is hinged to the side wall of the empty shell ring 42 close to the covering ring 37. Three connecting straight rods 41 are arranged at equal intervals with the axis of the empty shell ring 42 as the axial center.

[0042] Reference Figure 4 and Figure 6 A torsion spring 43 is fixedly connected between the side wall of the limiting ring 39 away from the cone 21 and the inner wall of the hollow ring 42 away from the cone 21. Three covering mesh plates 44 are arranged on the outer circumference of the covering ring 37 at equal intervals with its own axis as the axial center. The covering mesh plates 44 are flat plate structures composed of a combination of filter iron meshes. The two guide rails 30 on the edge of the slot of the same collecting slot 29 correspond one-to-one to the covering mesh plates 44. The side walls of the two guide rails 30 that are close to each other are vertically provided with a clearance slot 45. The clearance slot 45 passes through the bottom surface of the guide rails 30. The covering mesh plate 44 is clamped between the two guide rails 30 through the clearance slot 45, so that the covering mesh plate 44 can seal the slot of the collecting slot 29 of the filter mesh plate 23.

[0043] The implementation principle of the anti-blocking V-cone flowmeter of the present application is as follows: a worker bolts the flange ring 14 through the assembly through-hole 15 to secure the V-cone sensor 11 to the transport pipe through which the fluid flows. When the fluid flows inside the transport pipe, the fluid first flows through the positive pressure measuring tube 18 into the differential pressure transmitter 12, thereby enabling the differential pressure transmitter 12 to measure the initial value of the fluid before passing through the cone 21. The fluid then flows through the conical surface of the cone 21 and drives the spiral blade 26 to rotate. The fluid then flows through the filter screen 23 and is filtered by the filter screen 23 to obtain a clean fluid. Impurities contained in the fluid are retained on the surface of the filter screen 23. The filtered fluid then enters the negative pressure measuring tube 19 through the port of the assembly measuring tube 20. The filtered fluid then flows through the negative pressure measuring tube 19 into the differential pressure transmitter 12, thereby enabling the differential pressure transmitter 12 to measure the final value of the fluid after passing through the cone 21.

[0044] The spiral blade 26 drives the cover ring 37 to rotate through the friction between the active ring 25 and the inclined surface of the ratchet teeth 38 of the cover ring 37 until the cover ring 37 completely leaves the position between the two guide rails 30; at this time, the active ring 25 continues to rotate and will not drive the cover ring 37 to rotate, but will cause the cover ring 37 to remain in its current position; the sliding between the active ring 25 and the inclined surface of the ratchet teeth 38 of the cover ring 37 will cause the cover ring 37 to move, but the position of the cover ring 37 can be offset by the deformation of the torsion spring 43, thereby ensuring that the cover mesh plate 44 does not seal the collection groove 29 when the fluid flows. At the same time, the spiral blade 26 drives the three cleaning scrapers 27 to rotate synchronously through the active ring 25. The cleaning scrapers 27 use the cleaning bristles 28 to push impurities and garbage on the surface of the filter mesh plate 23 to the opening position of the collection box 32, and then the thrust generated by the fluid flow pushes the impurities and garbage into the collection box 32.

[0045] After the fluid flow data detection is completed, the spiral blade 26 stops rotating because the fluid inside the transport pipe no longer flows. The torsion spring 43, through its own deformation, drives the hollow shell ring 42 to rotate in the opposite direction. The hollow shell ring 42 drives the cover ring 37 to rotate in the opposite direction through the connecting straight rod 41. The cover ring 37, through the clearance groove 45, clamps the cover mesh plate 44 between the two guide rail slides 30. This enables the cover mesh plate 44 to seal the collection groove 29 of the filter mesh plate 23, thereby minimizing the flow of the fluid inside the transport pipe, causing garbage and impurities to escape from the collection box 32 through the collection groove 29. The staff manually presses the left and right side walls of the collection box 32 to shrink the opening of the collection box 32, thereby removing the collection box 32 and pouring out the garbage and impurities inside. The guide cylinder 33 of the collection box 32 is then placed between the two guide rail slides 30. The compression spring 36 between the two support straight rods 35, through its own deformation, drives the collection box 32 back to its original state. At this time, the guide rail slide 30 is clamped at the position between the two guide rail slides 30 through the semicircular groove 31, so that the collection box 32 is fixed to the side wall of the filter screen plate 23 away from the negative pressure measuring tube 19.

[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A blockage-proof V-cone flowmeter, comprising a V-cone sensor (11) and a differential pressure transmitter (12), wherein the V-cone sensor (11) comprises a measuring pipe (13), a positive pressure measuring pipe (18) and a negative pressure measuring pipe (19) fixedly connected between the measuring pipe (13) and the differential pressure transmitter (12), and a conical body (21) fixed to a port of the negative pressure measuring pipe (19) away from the differential pressure transmitter (12), wherein the port of the negative pressure measuring pipe (19) passes through the entire conical body (21) along the direction of fluid flow, a filter screen (23) is fixed to the inner circumference of the measuring pipe (13), and a cleaning mechanism for cleaning the surface of the filter screen (23) is provided inside the measuring pipe (13), characterized in that: The cleaning mechanism comprises an active circular ring (25) rotatably mounted between the filter screen disc (23) and the cone (21), a plurality of cleaning scrapers (27) fixed around the outer circumference of the active circular ring (25), and cleaning bristles (28) arranged on the side wall of the cleaning scraper (27) close to the filter screen disc (23), and a driving mechanism for driving the active circular ring (25) to rotate is arranged inside the measuring pipe (13); The surface of the filter screen (23) is provided with a plurality of collecting mechanisms for collecting impurities contained in the fluid, the collecting mechanisms comprising a collecting box (32) mounted on the side of the filter screen (23) away from the negative pressure measuring tube (19), and a detachable component arranged on the side of the filter screen (23) away from the negative pressure measuring tube (19) for enabling the collecting box (32) to be detachably mounted on the surface of the filter screen (23), and the collecting box (32) is connected to the overlapping portion of the filter screen (23); The detachable components include two guide rail cylinders (33) vertically fixed to the side walls of the collection box (32) close to the filter screen (23), and two guide rail slides (30) vertically arranged on the side walls of the filter screen (23) away from the negative pressure measuring tube (19). The two guide rail slides (30) are vertically provided with semicircular grooves (31) on the adjacent side walls. The semicircular grooves (31) pass through the top and bottom surfaces of the guide rail slides (30). The guide rail cylinders (33) are clamped to the surface of the filter screen (23) through the semicircular grooves (31); the top and bottom of the collection box (32) are both composed of elastic rubber sheets, and the other side walls of the collection box (32) are all surrounded by filter iron mesh. A cover mechanism for sealing the connecting portion between the collecting box (32) and the filter screen (23) is provided inside the measuring pipe (13), and the cover mechanism comprises a cover ring (37) rotatably mounted between the filter screen (23) and the cone (21) and a plurality of cover screens (44) fixed around the outer circumference of the cover ring (37). The side walls of the two corresponding guide rail slides (30) adjacent to each other are vertically provided with a clearance groove (45), and the clearance groove (45) passes through the bottom surface of the guide rail slide (30). The cover screen (44) can be clamped between the two corresponding guide rail slides (30) through the clearance groove (45).

2. The anti-blocking V-cone flowmeter according to claim 1, characterized in that: The driving mechanism comprises a spiral blade (26) fixed to the side wall of the active circular ring (25) close to the negative pressure measuring tube (19), and the spiral blade (26) is fixed in a plurality of circles around the surface of the conical body (21) that is in contact with the flow of the fluid, with the axis of the conical body (21) as the axial direction.

3. The anti-blocking V-cone flowmeter according to claim 1, characterized in that: A plurality of supporting mechanisms for supporting the collection box (32) are vertically arranged inside the collection box (32), and the supporting mechanisms include two supporting straight rods (35) respectively hinged to the vertical and opposite inner side walls of the collection box (32), and a compression spring (36) fixedly connected between the two supporting straight rods (35). The adjacent ends of the two supporting straight rods (35) are hinged to each other.

4. The anti-blocking V-cone flowmeter according to claim 1, characterized in that: A transmission mechanism is provided between the sealing ring (37) and the active ring (25) for enabling the active ring (25) to push the sealing ring (37) to rotate. The transmission mechanism comprises ratchet teeth (38) arranged around the axis of the cone (21) on the side surface close to the sealing ring (37) and the active ring (25). The two circles of ratchet teeth (38) are symmetrically arranged and mesh with each other.

5. The anti-blocking V-cone flowmeter according to claim 4, characterized in that: A reset mechanism for resetting the sealing ring (37) is provided on the side of the sealing ring (37) facing away from the filter screen (23), and the reset mechanism comprises a limiting ring (39) fixed to the side wall of the conical body (21) facing away from the negative pressure measuring tube (19), a hollow shell ring (42) sleeved on the circumference of the limiting ring (39), a torsion spring (43) fixedly connected between the side wall of the limiting ring (39) and the inner side wall of the hollow shell ring (42) away from the conical body (21), and a plurality of connecting straight rods (41) hinged between the side walls of the sealing ring (37) and the hollow shell ring (42) close to each other.

Images