Fluid flow monitoring device

Abstract

The utility model relates to the technical field of fluid flow monitoring, in particular to a fluid flow monitoring device. The fluid flow monitoring device comprises a machine shell, an impeller, a flow guide structure and a monitoring module, the machine shell is provided with an overflowing cavity, the overflowing cavity is provided with a liquid inlet and a liquid outlet, the flow guide structure is installed in the overflowing cavity, and the impeller is rotationally connected between the flow guide structure and the cavity wall of the overflowing cavity; the flow guide structure can guide flowing of fluid in the overflowing cavity to drive the impeller to rotate, the monitoring module comprises a permanent magnet assembly and a Hall pulse assembly, the permanent magnet assembly is fixedly connected with the impeller, the Hall pulse assembly is arranged outside the machine shell, and the Hall pulse assembly can sense magnetic field changes of the permanent magnet assembly and output pulse signals. The pulse signal is converted into the instantaneous flow and the accumulated flow of the fluid, the monitoring precision is high, and the actual monitoring requirement is met. In addition, the Hall pulse assembly is isolated from the fluid, so that the protection of the Hall pulse assembly is improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to fluid flow monitoring technical field especially relates to fluid flow monitoring device. BACKGROUND

[0002] In the transmission system of fluid, for guaranteeing the transmission precision and transmission stability of fluid, need real -time monitoring fluid transmission flow.

[0003] In the related art, usually use mechanical water gauge to carry out the monitoring of fluid flow. For the flow monitoring of mechanical water gauge, need staff to manually copy the display number and self -statistics fluid cumulative flow, and statistics step is tedious, and the degree of intelligentization is low, and mechanical water gauge can not calculate instantaneous flow, can not satisfy actual monitoring demand.

[0004] In order to solve the above problem, the prior art comes out electronic water gauge to carry out the monitoring of fluid flow, but electronic water gauge is easy to corrode and damage in actual use, influence monitoring precision.

[0005] Therefore, fluid flow monitoring device is urgently needed to solve the above problems. UTILITY MODEL CONTENTS

[0006] The utility model discloses a fluid flow monitoring device, to realize the automation monitoring of fluid cumulative flow and instantaneous flow, and the monitoring precision is high, and the monitoring efficiency is high, satisfies actual monitoring demand.

[0007] To achieve this purpose, the utility model adopts the following technical scheme:

[0008] Fluid flow monitoring device, comprising:

[0009] Machine shell has overflow chamber, and the overflow chamber is provided with liquid inlet and liquid outlet;

[0010] Impeller and guide structure, the guide structure is installed in the overflow chamber, the impeller is rotatably connected between the guide structure and the cavity wall of the overflow chamber, and the guide structure can provide guidance for the flow of fluid in the overflow chamber to drive the impeller to rotate.

[0011] Monitoring module, including permanent magnet assembly and hall pulse assembly, the permanent magnet assembly is fixedly connected with the impeller, the hall pulse assembly is arranged outside the machine shell, and the hall pulse assembly can sense the magnetic field change of the permanent magnet assembly and output pulse signal.

[0012] As an optional solution, the machine shell comprises:

[0013] First buckling piece has first joint, and

[0014] The second fastening member has a second joint, the first fastening member is fastened with the second fastening member, and the first fastening member and the second fastening member jointly enclose the flow passage. Any one of the first joint and the second joint is provided with the liquid inlet, and the other one is provided with the liquid outlet.

[0015] Optionally, the outer end surface of the first fastening member and / or the second fastening member is provided with an identification member for indicating the liquid inlet and / or the liquid outlet.

[0016] Optionally, the first joint and / or the second joint is fastened with a pipe clamp for transmitting the fluid.

[0017] Optionally, the flow guide structure is a cylindrical structure with an open upper end, the impeller is accommodated in an accommodation cavity of the cylindrical structure and is connected with the flow guide structure for rotation around the axis thereof, the axis of the impeller is in the same direction as the axis of the accommodation cavity, the flow guide structure is provided with a circumferentially extending overlapping boss along the outer peripheral wall in the axial direction, the inner cavity wall of the flow passage is provided with a supporting boss, and the overlapping boss is fastened on the supporting boss.

[0018] Optionally, the flow guide structure is split into a first flow guide part at one end of the overlapping boss in the axial direction and a second flow guide part at the other end of the overlapping boss in the axial direction by the overlapping boss, any one of the first flow guide part and the second flow guide part is opposite to the liquid inlet, the other one is opposite to the liquid outlet, and the liquid inlet and the liquid outlet are arranged opposite to each other in the radial direction of the impeller.

[0019] Any one of the first flow guide part and the second flow guide part can drive the fluid flowing into the flow passage along the liquid inlet to rotate around the positive direction of the axial direction and flow into the accommodation cavity, and the other one of the first flow guide part and the second flow guide part can drive the fluid in the accommodation cavity to rotate around the positive direction of the axial direction and flow out of the accommodation cavity.

[0020] Optionally, the axial outer peripheral wall of the first flow guide part is provided with a first flow guide notch, and the axial side wall of the first flow guide notch is respectively provided with a first flow guide inclined surface.

[0021] The axial outer peripheral wall of the second flow guide part is provided with a second flow guide notch, the axial side wall of the second flow guide notch is respectively provided with a second flow guide inclined surface, and the first flow guide inclined surface and the second flow guide inclined surface have the same inclination angle in the radial direction and opposite inclination directions.

[0022] As an option, the impeller is provided with a butt joint shaft seat at each axial end, the butt joint shaft seat is fixedly connected with the flow guide structure and the cavity wall of the flow chamber respectively, and the axial ends of the impeller are rotatably connected with the butt joint shaft seats respectively.

[0023] As an option, the permanent magnet assembly comprises:

[0024] A supporting member is fixedly connected with the impeller;

[0025] A permanent magnet is supported on the supporting member; and

[0026] A pressing member is arranged above the permanent magnet and detachably connected with the supporting member.

[0027] As an option, the Hall pulse assembly comprises:

[0028] A Hall pulse member is accommodated in the storage groove of the outer end face of the shell, the Hall pulse member can sense the magnetic field change of the permanent magnet and output a pulse signal; and

[0029] A protection member is used for plugging the opening of the storage groove.

[0030] The fluid flow monitoring device provided by the embodiment has the following beneficial effects:

[0031] The fluid flow monitoring device provided by the embodiment has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a first structural schematic view of the fluid flow monitoring device provided by the embodiment of the utility model;

[0033] Figure 2is a second structural schematic view of the fluid flow monitoring device provided by the embodiment of the utility model;

[0034] Figure 3 is the explosion schematic view of the fluid flow monitoring device provided by the embodiment of the utility model;

[0035] Figure 4 is the cross section schematic view of the fluid flow monitoring device provided by the embodiment of the utility model;

[0036] Figure 5 is Figure 4 the local enlarged view of A in the middle;

[0037] Figure 6 is the first structural schematic view of the flow guide structure provided by the embodiment of the utility model;

[0038] Figure 7 is the second structural schematic view of the flow guide structure provided by the embodiment of the utility model;

[0039] Figure 8 is the cross section schematic view of the first flow guide part provided by the embodiment of the utility model;

[0040] Figure 9 is the cross section schematic view of the second flow guide part provided by the embodiment of the utility model.

[0041] in the figure:

[0042] 100, the casing;110, the first buckling piece;111, the first joint;112, the first protrusion;113, the second protrusion;114, the storage groove;120, the second buckling piece;121, the second joint;122, the first recess;123, the third protrusion;130, the flow chamber;131, the liquid inlet;132, the liquid outlet;

[0043] 200, the impeller;210, the butt joint shaft seat;

[0044] 300, the flow guide structure;310, the lapping boss;320, the first flow guide part;321, the first flow guide gap;3211, the first flow guide inclined surface;330, the second flow guide part;331, the second flow guide gap;3311, the second flow guide inclined surface;

[0045] 400, the monitoring module;410, the permanent magnet assembly;411, the permanent magnet;412, the support piece;4121, the accommodation groove;413, the pressing piece;420, the hall pulse assembly;421, the hall pulse piece;422, the protection piece;4221, the threading hole. DETAILED DESCRIPTION

[0046] In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model is further illustrated below in combination with the drawings and through specific implementation manners.

[0047] In the description of the utility model, unless another explicit provision and limitation, the terms "connected", "connected", "fixed" should be broad sense understanding, for example, can be fixed connection, or can be detachable connection, or be integrated;Can be mechanical connection, or electrical connection;Can be directly connected, or indirectly connected through the intermediate medium, can be the communication inside two elements or the interaction relationship of two elements.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0048] In the utility model, unless another explicit provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, or can include the first and second features are not direct contact but contact through another feature between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than the second feature.

[0049] In the description of the embodiment, the terms "on", "under", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0050] In the transmission system of fluid, in order to ensure the transmission accuracy and transmission stability of fluid, the transmission flow of fluid needs to be monitored in real time.Mechanical water meter is usually used to monitor fluid flow.For the flow monitoring of mechanical water meter, the staff needs to manually copy the displayed number and manually count the cumulative flow of fluid, and the counting step is tedious, the intelligent degree is low, and the mechanical water meter cannot calculate the instantaneous flow, which cannot meet the actual monitoring demand.

[0051] In order to solve the above problems, such as Figures 1-4As shown, the embodiment provides a fluid flow monitoring device. The fluid flow monitoring device comprises a casing 100, an impeller 200, a flow guide structure 300 and a monitoring module 400, wherein the casing 100 has a flow chamber 130, the flow chamber 130 is provided with a liquid inlet 131 and a liquid outlet 132, the flow guide structure 300 is installed in the flow chamber 130, the impeller 200 is rotatably connected between the flow guide structure 300 and the cavity wall of the flow chamber 130, the flow guide structure 300 can provide guidance for the flow of fluid in the flow chamber 130 to drive the impeller 200 to rotate, and the monitoring module 400 comprises a permanent magnet assembly 410 and a Hall pulse assembly 420, the permanent magnet assembly 410 is fixedly connected with the impeller 200, and the Hall pulse assembly 420 is arranged outside the casing 100, the Hall pulse assembly 420 can sense the magnetic field change of the permanent magnet assembly 410 and output a pulse signal.

[0052] The fluid flow monitoring device can make the fluid flow into the flow chamber 130 through the liquid inlet 131, flow through the flow chamber 130 and then flow out through the liquid outlet 132, install the flow guide structure 300 in the flow chamber 130, and rotatably install the impeller 200 between the flow guide structure 300 and the cavity wall of the flow chamber 130, so as to provide guidance for the flow of fluid in the flow chamber 130 by the flow guide structure 300, drive the impeller 200 to rotate relative to the flow guide structure 300 and the casing 100, and fixedly connect the permanent magnet assembly 410 in the monitoring module 400 with the impeller 200, so as to drive the permanent magnet assembly 410 to rotate relative to the flow guide structure 300 and the casing 100, make the Hall pulse assembly 420 fixed outside the casing 100 in the monitoring module 400 sense the magnetic field change generated by the permanent magnet assembly 410 in the rotating process and output in the form of a pulse signal, and convert the pulse signal into the instantaneous flow and the cumulative flow of the fluid according to the program algorithm, so as to have high monitoring precision and meet the actual monitoring requirements. In addition, the Hall pulse assembly 420 is arranged outside the casing 100, so as to isolate the Hall pulse assembly 420 from the fluid, improve the protection of the Hall pulse assembly 420, and improve the service life of the fluid flow monitoring device.

[0053] It should be noted that in the embodiment, the fluid is water. In other embodiments, the fluid can also be oil, alcohol or other Newtonian liquids, and the embodiment is not limited.

[0054] Specifically, the permanent magnet assembly 410 comprises a supporting piece 412, a permanent magnet 411 and a pressing piece 413, wherein the supporting piece 412 is fixedly connected with the impeller 200, the permanent magnet 411 is supported on the supporting piece 412, and the pressing piece 413 is arranged above the permanent magnet 411 and detachably connected with the supporting piece 412. By fixing the supporting piece 412 in the permanent magnet assembly 410 with the impeller 200, supporting the permanent magnet 411 on the supporting piece 412, and arranging the pressing piece 413 above the permanent magnet 411 and detachably connecting the pressing piece 413 with the supporting piece 412, the permanent magnet 411 can be clamped and fixed between the supporting piece 412 and the pressing piece 413, and the relative fixation of the permanent magnet 411 and the impeller 200 is achieved.

[0055] It should be noted that, in the embodiment, the supporting piece 412 is provided with a containing groove 4121, and the permanent magnet 411 is contained in the containing groove 4121, so as to further improve the fixing effect of the permanent magnet 411. In addition, in the embodiment, when the permanent magnet 411 is clamped and fixed between the supporting piece 412 and the pressing piece 413, the permanent magnet 411 is coaxially fixed together with the impeller 200.

[0056] As an optional solution, the Hall pulse assembly 420 comprises a Hall pulse piece 421 and a protection piece 422, wherein the outer end surface of the shell 100 is provided with a storage groove 114, the Hall pulse piece 421 is contained in the storage groove 114, the Hall pulse piece 421 can sense the magnetic field change of the permanent magnet 411 and output a pulse signal, and the protection piece 422 is used for plugging the opening of the storage groove 114, so as to fix the Hall pulse piece 421 outside the shell 100 and isolate the Hall pulse piece 421 from the outside, thereby further improving the protection of the Hall pulse piece 421. It should be noted that, in the embodiment, the Hall pulse piece 421 is a Hall sensor and a circuit board, and when the Hall pulse piece 421 and the permanent magnet 411 are assembled on the shell 100, the Hall pulse piece 421 is opposite to the permanent magnet 411, so as to ensure the sensing effect of the Hall pulse piece 421 on the magnetic field change of the permanent magnet 411. The specific structure and working principle of the Hall sensor and the circuit board both belong to the prior art, and will not be described here.

[0057] In order to further facilitate the staff to observe the instantaneous flow and the cumulative flow of the fluid, the fluid flow monitoring device provided in the embodiment further comprises a digital display assembly, the digital display assembly is connected with the Hall pulse piece 421 by wire harness, and the digital display assembly is used for displaying the cumulative flow and the instantaneous flow obtained according to the program algorithm. It should be noted that, in the embodiment, the digital display assembly is a digital display. The specific structure and working principle of the digital display both belong to the prior art, and will not be limited in the embodiment.

[0058] In addition, as Figure 3As shown, to ensure the wire harness connection between the digital display assembly and the Hall pulse piece 421, the protection piece 422 is provided with a wire hole 4221 to ensure that the wire harness can pass through the protection piece 422 along the wire hole 4221 and extend into the storage groove 114 to be connected with the Hall pulse piece 421.

[0059] In combination Figures 1-4 The specific structure of the shell 100 will be described. The shell 100 includes a first clamping piece 110 and a second clamping piece 120, wherein the first clamping piece 110 has a first joint 111, the second clamping piece 120 has a second joint 121, the first clamping piece 110 and the second clamping piece 120 are clamped and fixed, the first clamping piece 110 and the second clamping piece 120 together enclose a flow chamber 130, and any one of the first joint 111 and the second joint 121 is provided with a liquid inlet 131, and the other is provided with a liquid outlet 132. By splitting the shell 100 into the first clamping piece 110 and the second clamping piece 120 which are clamped and fixed together, the first clamping piece 110 and the second clamping piece 120 together enclose the flow chamber 130, and the liquid inlet 131 and the liquid outlet 132 are respectively arranged in the first joint 111 in the first clamping piece 110 and the second joint 121 in the second clamping piece 120, realizing the detachable assembly of the shell 100. It should be noted that in the embodiment, the liquid inlet 131 is arranged on the first joint 111, and the liquid outlet 132 is arranged on the second joint 121. In other embodiments, the liquid outlet 132 can be arranged on the first joint 111, and the liquid inlet 131 can be arranged on the second joint 121, and the embodiment is not limited in particular.

[0060] Specifically, as shown in the embodiment, the first clamping piece 110 is provided with a first protrusion 112 close to the end face of the second clamping piece 120, the second clamping piece 120 is provided with a first recess 122 close to the end face of the first clamping piece 110, and the first protrusion 112 and the first recess 122 are inserted and fixed to clamp and fix the first clamping piece 110 and the second clamping piece 120 together. Figure 4

[0061] In addition, in order to improve the service life of the shell 100, the first clamping piece 110 and the second clamping piece 120 are both made of plastic material. In the embodiment, the first clamping piece 110 and the second clamping piece 120 are both made of PVC (Polyvinyl Chloride, polyvinyl chloride) material. In other embodiments, the first clamping piece 110 and the second clamping piece 120 can also be made of PE (Polyethylene, polyethylene), PP (Polypropylene, polypropylene) or other plastic materials, and the embodiment is not limited in particular.

[0062] ​In order to distinguish the liquid inlet 131 and the liquid outlet 132, in the embodiment, the outer end surface of the second fastening member 120 is provided with an identification member, and the identification member on the second fastening member 120 is used to indicate the liquid outlet 132. Specifically, the upper end surface of the second fastening member 120 is provided with a conical identification member, and the conical identification member indicates the liquid outlet 132. In other embodiments, the identification member can be provided only on the first fastening member 110 to indicate the liquid inlet 131, or provided on both the first fastening member 110 and the second fastening member 120 to indicate both the liquid inlet 131 and the liquid outlet 132, and the specific shape of the identification member can be adjusted as required, which is not limited in the embodiment.

[0063] In an optional embodiment, the first joint 111 and the second joint 121 are respectively fixed with pipe clamps for transmitting fluid. By respectively fixing the first joint 111 and the second joint 121 with the pipe clamps, the disassembly efficiency of the pipe and the casing 100 can be improved, and the disassembly difficulty of the pipe and the casing 100 can be reduced.

[0064] Specifically, as shown in Figures 1-4 the first joint 111 and the second joint 121 are respectively outwardly extending cylindrical structures. When the first joint 111 and the second joint 121 need to be fixedly connected with the pipe, the pipe is first sleeved on the outer periphery of the first joint 111 and the second joint 121, and then two clamps are respectively sleeved on the outer periphery of the corresponding pipe along the radial direction of the first joint 111 and the second joint 121 to clamp and fix the first joint 111 and the second joint 121 with the corresponding pipe.

[0065] As shown in Figures 3-7 the flow guide structure 300 is a cylindrical structure with an open upper end, the impeller 200 is accommodated in the accommodation cavity of the cylindrical structure and is rotationally connected with the flow guide structure 300 about the axial direction thereof, the axial direction of the impeller 200 is the same as the axial direction of the accommodation cavity, the outer peripheral wall of the flow guide structure 300 in the axial direction is provided with a circumferentially extending lap boss 310, the inner cavity wall of the flow chamber 130 is provided with a supporting boss, and the lap boss 310 is lap-joint fixed on the supporting boss. By providing the lap boss 310 on the axial outer peripheral wall of the cylindrical flow guide structure 300 and providing the lap boss 310 in the flow chamber 130, the lap boss 310 is lap-joint fixed on the supporting boss, which realizes the stable fixation of the flow guide structure 300 in the flow chamber 130. By providing an opening at the upper end of the flow guide structure 300 and accommodating the impeller 200 in the accommodation cavity of the flow guide structure 300, the axial direction of the impeller 200 is the same as the axial direction of the accommodation cavity, and the impeller 200 can be rotationally connected with the flow guide structure 300 about the axial direction thereof, which ensures that the impeller 200 can rotate about the axial direction thereof under the drive of the fluid.

[0066] It should be noted that the shell 100 is buckled by the first buckling member 110 and the second buckling member 120. Therefore, as shown in Figure 3 and Figure 5 , the first buckling member 110 is provided with the second protrusion 113, and the second buckling member 120 is provided with the third protrusion 123. When the first buckling member 110 and the second buckling member 120 are buckled and fixed, the second protrusion 113 and the third protrusion 123 jointly form the supporting boss.

[0067] In addition, in order to further improve the rotating effect of the impeller 200 relative to the shell 100 and the flow guide structure 300, as shown in Figure 3 and Figure 4 , the two ends of the impeller 200 in the axial direction are respectively provided with the butt joint shaft seat 210, which is fixedly connected with the cavity wall of the flow guide structure 300 and the flow chamber 130, and the two ends of the impeller 200 in the axial direction are rotatably connected with the butt joint shaft seat 210.

[0068] In the embodiment, as shown in Figures 6-9 , the flow guide structure 300 is axially split into the first flow guide part 320 located at one end of the lap boss 310 and the second flow guide part 330 located at the other end of the lap boss 310 by the lap boss 310. The first flow guide part 320 is opposite to the liquid inlet 131, and the second flow guide part 330 is opposite to the liquid outlet 132. The liquid inlet 131 and the liquid outlet 132 are oppositely arranged along the impeller 200. The first flow guide part 320 can drive the fluid flowing into the flow chamber 130 along the liquid inlet 131 to rotate around the axial positive direction and flow into the containing cavity. The second flow guide part 330 can drive the fluid in the containing cavity to rotate around the axial positive direction and flow out of the containing cavity.

[0069] By splitting the flow guide structure 300 into the first flow guide part 320 and the second flow guide part 330 located at the two ends of the lap boss 310, the liquid inlet 131 opposite to the first flow guide part 320 and the liquid outlet 132 opposite to the second flow guide part 330 are arranged along the impeller 200. The first flow guide part 320 drives the fluid to rotate around the axial positive direction of the impeller 200 and flow into the containing cavity, and the second flow guide part 330 drives the fluid to rotate around the axial positive direction of the impeller 200 and flow out of the containing cavity, thereby achieving the effect of driving the impeller 200 in the containing cavity to rotate around the axial positive direction. It should be noted that in other embodiments, the first flow guide part 320 can be opposite to the liquid outlet 132, and the second flow guide part 330 can be opposite to the liquid inlet 131. The present embodiment is not limited in particular. It should be noted that in the present embodiment, the rotation around the axial positive direction is counterclockwise rotation around the axial direction. In other embodiments, the rotation around the axial positive direction can be counterclockwise rotation around the axial direction, and the present embodiment is not limited in particular.

[0070] Specifically, the axial side wall of the first flow guide part 320 is provided with a first flow guide gap 321, the axial outer peripheral wall of the first flow guide gap 321 is respectively provided with a first flow guide slope 3211, the axial outer peripheral wall of the second flow guide part 330 is provided with a second flow guide gap 331, the axial side wall of the second flow guide gap 331 is respectively provided with a second flow guide slope 3311, the radial inclination angle of the first flow guide slope 3211 and the second flow guide slope 3311 is the same and the inclination direction is opposite. By respectively providing the first flow guide gap 321 on the axial outer peripheral wall of the first flow guide part 320 and the second flow guide gap 331 on the axial outer peripheral wall of the second flow guide part 330, the first flow guide slope 3211 is arranged on the axial side wall of the first flow guide gap 321, the second flow guide slope 3311 is arranged on the axial side wall of the second flow guide gap 331, the radial inclination angle of the first flow guide slope 3211 and the second flow guide slope 3311 is the same and the inclination angle is opposite, which can be matched with the liquid inlet 131 and the liquid outlet 132 arranged opposite along the radial direction, and the purpose of guiding the fluid flowing into the containing cavity along the first flow guide gap 321 rotating along the axial direction and guiding the fluid flowing out of the containing cavity along the second flow guide gap 331 rotating along the axial direction is realized.

[0071] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, on the basis of the above description, other different forms of changes or variations can be made. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. Fluid flow monitoring device, characterized in that The utility model relates to a kind of monitoring module and machine shell, including: Machine shell (100), with overflow chamber (130), the overflow chamber (130) is opened with liquid inlet (131) and liquid outlet (132); Impeller (200) and guide structure (300), the guide structure (300) is installed in the overflow chamber (130), the impeller (200) is rotatably connected between the guide structure (300) and the cavity wall of the overflow chamber (130), the guide structure (300) can provide guide for the flow of fluid in the overflow chamber (130) to drive the impeller (200) rotation; And Monitoring module (400), including permanent magnet assembly (410) and hall pulse assembly (420), the permanent magnet assembly (410) is fixedly connected with the impeller (200), the hall pulse assembly (420) is arranged outside the machine shell (100), the hall pulse assembly (420) can sense the magnetic field change of the permanent magnet assembly (410) and output pulse signal.

2. The fluid flow monitoring device of claim 1, wherein, The machine shell (100) includes: First buckling piece (110), with first joint (111);And Second buckling piece (120), with second joint (121), the first buckling piece (110) and the second buckling piece (120) are buckled and fixed, the first buckling piece (110) and the second buckling piece (120) are surrounded together to form the overflow chamber (130), any one of the first joint (111) and the second joint (121) is provided with the liquid inlet (131), and the other one is provided with the liquid outlet (132).

3. The fluid flow monitoring device of claim 2, wherein, The outer end surface of the first buckling piece (110) and / or the second buckling piece (120) is provided with identification element, and the identification element is used to indicate the liquid inlet (131) and / or the liquid outlet (132).

4. The fluid flow monitoring device of claim 2, wherein, The first joint (111) and / or the second joint (121) are fixed with pipe clamp for transmitting the fluid.

5. The fluid flow monitoring device of any one of claims 1 to 4, wherein, The guide structure (300) is open-ended cylindrical structure, the impeller (200) is contained in the containing cavity of the cylindrical structure and is rotatably connected with the guide structure (300) around its own axis, the axis of the impeller (200) is same with the axis of the containing cavity, the outer peripheral wall of the guide structure (300) is provided with circumferentially extending overlap boss (310) along the axis, the inner cavity wall of the overflow chamber (130) is provided with supporting boss, and the overlap boss (310) is lapped and fixed on the supporting boss.

6. The fluid flow monitoring device of claim 5, wherein, The flow guide structure (300) is split into a first flow guide part (320) at one end of the overlap boss (310) and a second flow guide part (330) at the other end of the overlap boss (310) in the axial direction by the overlap boss (310), any one of the first flow guide part (320) and the second flow guide part (330) is opposite to the liquid inlet (131), and the other one is opposite to the liquid outlet (132), and the liquid inlet (131) and the liquid outlet (132) are arranged opposite to each other in the radial direction of the impeller (200); Any one of the first flow guide part (320) and the second flow guide part (330) can drive the fluid flowing into the flow chamber (130) along the liquid inlet (131) to rotate in the axial positive direction and flow into the containing cavity, and the other one of the first flow guide part (320) and the second flow guide part (330) can drive the fluid in the containing cavity to rotate in the axial positive direction and flow out of the containing cavity.

7. The fluid flow monitoring device of claim 6, wherein, The axial outer peripheral wall of the first flow guide part (320) is provided with a first flow guide gap (321), and the axial side wall of the first flow guide gap (321) is respectively provided with a first flow guide inclined surface (3211); The axial outer peripheral wall of the second flow guide part (330) is provided with a second flow guide gap (331), and the axial side wall of the second flow guide gap (331) is respectively provided with a second flow guide inclined surface (3311), and the radial inclination angles of the first flow guide inclined surface (3211) and the second flow guide inclined surface (3311) are the same and the inclination directions are opposite.

8. The fluid flow monitoring device of any one of claims 1-4, wherein, The two ends of the impeller (200) in the axial direction are respectively provided with a butt joint shaft seat (210), the butt joint shaft seat (210) is fixedly connected with the flow guide structure (300) and the cavity wall of the flow chamber (130), respectively, and the two ends of the impeller (200) in the axial direction are rotatably connected with the butt joint shaft seat (210).

9. The fluid flow monitoring device of any one of claims 1-4, wherein, The permanent magnet assembly (410) comprises: a supporting member (412) fixedly connected with the impeller (200); a permanent magnet (411) supported on the supporting member (412); and a pressing member (413) covering the permanent magnet (411) and detachably connected with the supporting member (412).

10. The fluid flow monitoring device of claim 9, wherein, The Hall pulse assembly (420) comprises: a Hall pulse member (421), an outer end surface of the shell (100) is provided with a storage groove (114), the Hall pulse member (421) is accommodated in the storage groove (114), and the Hall pulse member (421) can sense the magnetic field change of the permanent magnet (411) and output a pulse signal; and a protection member (422) for sealing the opening of the storage groove (114).

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