Liquid flow metering device, component and system

Abstract

The utility model relates to a liquid flow metering device, subassembly and system.The liquid flow metering device comprises a measuring chamber, a floater subassembly, a sleeve and an electrical subassembly, a measuring chamber body is hermetically connected with a liquid inlet pipeline and a liquid outlet pipeline, the liquid inlet pipeline extends into the measuring chamber body, and the liquid outlet pipeline extends into the measuring chamber body; a liquid outlet at the tail end faces upwards; the floater assembly comprises a floater and a floater connecting rod integrally connected with the floater, the floater is arranged at a liquid outlet in the tail end of the liquid inlet pipeline, and the tail end of the floater connecting rod is connected with the detection part; the lower end of the sleeve is communicated with the measuring cavity body, the tail end of the floater connecting rod extends into a guide channel in the sleeve from the lower end of the sleeve, and a position detection device is arranged in the upper end of the sleeve; the electrical assembly comprises a shell and an electrical module, and the electrical module receives a floater height detection signal sensed by the position detection device. The metering device provided by the embodiment of the utility model is low in cost and accurate in metering.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement, in particular to a liquid flow metering device, component and system. Background Art

[0002] Flowmeter, also known as flow meter, is a device for measuring fluid flow. It plays an important role in many fields such as daily life, energy, petroleum, chemical industry, food, pharmaceutical, and electronic manufacturing. For example, households, enterprises, factories, etc. usually install water meters to measure water consumption, which not only helps individuals understand water use, but also helps municipalities to better manage water resources. For another example, in sewage treatment plants, flow meters are used to monitor sewage flow to ensure the normal operation of the treatment process. For another example, in the production process of chemical, petroleum, pharmaceutical and other industries, the flow of various fluids is accurately measured to ensure the stability and safety of the production process. When hospitals use oxygen, anesthetic gases, etc., flow meters are used to measure the flow of oxygen, anesthetic gases, etc. to ensure the safety of patients and treatment effects.

[0003] There are many types of flow meters, depending on the properties of the measured fluid, the measurement principle, and the application scenario. According to the metering structure and principle, there are volumetric flow meters, impeller flow meters, differential pressure flow meters, variable area flow meters, velocity flow meters, momentum flow meters, impulse flow meters, electromagnetic flow meters, ultrasonic flow meters, etc. The above categories can be further subdivided, so far, there are as many as 60 types of flow meters available for industrial use. The reason for the large variety is that there is still no flow meter that is suitable for any fluid, range, any flow state and use conditions. Each flow meter has specific applicability and limitations, and it is impossible to achieve multiple uses of one meter. For example, water meters for measuring water consumption usually adopt an impeller structure. For example, the Chinese utility model patent with publication number CN202274897U and utility model name “New mechanical anti-clogging flowmeter” discloses an improved impeller flowmeter for use in heating pipes. For another example, the Chinese utility model patent with publication number CN202614307U and utility model name “An integrated valve-controlled water meter” discloses an improved water meter, which is essentially an impeller flow metering device.

[0004] Some water meters also use ultrasonic waves to measure water consumption, but due to its high cost and expensive product price, it is not suitable for widespread application. In addition, in the fields of sewage treatment, petroleum, chemical industry, power generation, pharmaceuticals, etc., float flow metering devices are usually used to measure liquids and gases, but the accuracy is not high. Utility Model Content

[0005] In view of the technical problems existing in the prior art, the utility model proposes a liquid flow metering device, component and system with low cost and accurate measurement.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides a liquid flow metering device, comprising:

[0007] A measuring chamber, wherein the measuring chamber body is sealed to connect a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe extends into the measuring chamber body, and a liquid outlet at the end faces upward;

[0008] The float assembly comprises a float and a float connecting rod integrally connected thereto, wherein the float is placed at the liquid outlet at the end of the liquid inlet pipe, and the float closes the liquid outlet of the liquid inlet pipe when there is no liquid pushing, and the float is lifted upward to open the liquid outlet under the push of the liquid; a detection part is installed at the end of the float connecting rod;

[0009] A sleeve, the lower end of the sleeve is communicated with the measuring chamber body, the end of the float connecting rod extends from the lower end of the sleeve into the guide channel inside the sleeve, a position detection device is built in the sleeve, when the float connecting rod moves in the guide channel inside the sleeve, the position detection device senses the position of the detection part of the end of the float connecting rod in real time to obtain a float height detection signal; and

[0010] The electrical component comprises a first shell and an electrical module. The first shell comprises a sleeve built-in space for embedding the sleeve. The electrical module receives a float height detection signal sensed by the position detection device.

[0011] Optionally, the sleeve is an inverted funnel structure, the lower end of the inverted funnel structure is sealed and connected to the measuring chamber body, and the interior of the upper tubular structure is a guide channel.

[0012] Optionally, a connection structure protruding from the outer wall is provided on the outer side wall of the inverted funnel structure for fixed connection with the first shell of the electrical component.

[0013] Optionally, the measuring chamber body includes a base, a side wall and an upper cover, the top of the base is sealedly connected to the bottom of the side wall, the top of the side wall is sealedly connected to the bottom of the upper cover, a liquid inlet and a liquid outlet are provided on the side wall of the cylindrical structure formed by the base and the side wall, which are respectively sealedly connected to the liquid inlet pipe and the liquid outlet pipe, the top of the upper cover has a through hole, and the bottom of the sleeve is sealedly connected to the through hole; the first shell is fixed to the periphery of the upper cover.

[0014] Optionally, the upper cover is in the shape of a truncated cone, and the diameter of the bottom of the cone is greater than the diameter of the top of the cone.

[0015] Optionally, the sealed connection is formed by welding.

[0016] Optionally, the measuring chamber body, the liquid inlet pipe and the liquid outlet pipe are cast integrally.

[0017] Optionally, the liquid inlet pipe includes a horizontal section extending horizontally from the side wall of the measuring chamber body into the interior of the measuring chamber body, a vertical section with an end liquid outlet facing upward, and a curved section in the middle, wherein the length of the vertical section is not less than the effective length of the float, and the maximum curvature radius of the side wall of the curved section is not greater than the radius of the measuring chamber body.

[0018] Optionally, a valve is provided in the liquid outlet pipe, and correspondingly, a driving component is provided in the electrical component, the driving component is connected to an actuator of the valve, the driving component controls the actuator based on a control instruction, and controls the working state of the valve through the actuator.

[0019] Optionally, the valve is a ball valve, and correspondingly, the driving component is a motor, the actuator of the valve is a ball valve shaft, one end of the ball valve shaft is connected to the output shaft of the motor, and based on the rotation of the motor, the ball valve shaft drives the ball of the ball valve to rotate.

[0020] Optionally, a shielding layer is provided around the built-in space of the sleeve, and when the sleeve is built into the built-in space of the sleeve, the sleeve is built into the shielding layer.

[0021] Optionally, the first shell includes a shell base and a corresponding cover body, the shell base includes a sleeve built-in space and an electrical module accommodating compartment, wherein the shell base and / or the cover body are made of a material with electromagnetic shielding effect.

[0022] Optionally, the electrical module includes a signal processing unit and a first communication unit, the signal processing unit receives a float height detection signal sent by a position detection device, obtains float height data after preprocessing, and sends the float height data to an external device via the first communication unit, which calculates the liquid flow data.

[0023] Optionally, the electrical module includes a first processing unit, and correspondingly, a first display screen is installed on the first shell; the first processing unit receives a float height detection signal sent by a position detection device, calculates flow data based on the float height detection signal, and displays the flow data on the first display screen.

[0024] Optionally, the electrical module further includes a power module, and correspondingly, the first shell includes a power accommodating compartment for accommodating the power module.

[0025] Optionally, the power module is one or more batteries, wherein the batteries are disposable batteries or rechargeable batteries.

[0026] Optionally, the first shell includes a spare battery compartment for placing a spare battery; or, the measuring chamber body further includes a vibration power generation module, the electrical component includes a power management module, the current output end of the vibration power generation module is electrically connected to the charging management end of the power management module via a wire channel, and the charging control end of the power management module is electrically connected to the charging end of the rechargeable battery; during the flow metering process, the vibration power generation module uses the vibration induced current generated by the liquid flow.

[0027] According to one aspect of the utility model, the utility model provides a liquid flow metering component, comprising:

[0028] A processing device, comprising a second housing and a processing module, wherein the processing module is built into an electrical compartment in the second housing;

[0029] A plurality of the aforementioned liquid flow metering devices are configured and installed in respective pipelines, obtain float height data during flow metering, and send the float height data to the processing device;

[0030] Wherein, the processing module in the processing device receives the float height data sent by the signal processing unit in the liquid flow metering device, and calculates and obtains the flow data of the corresponding liquid flow metering device.

[0031] Optionally, the processing module in the processing device includes a second communication unit configured to send flow data of each liquid flow metering device to the management center server and receive control instructions sent by the management center server.

[0032] Optionally, a second display screen is installed on the second shell in the liquid flow metering assembly, and is configured to display the flow data of each flow metering device calculated by the processing module.

[0033] Optionally, the processing module in the processing device includes a third communication unit configured to communicate with an external device within an external preset distance range.

[0034] According to one aspect of the utility model, the utility model provides a liquid flow metering system, comprising:

[0035] A management center server configured to at least set liquid flow metering parameters and manage flow data;

[0036] A plurality of any of the aforementioned liquid flow metering devices, configured to receive metering parameters of the management center, measure the liquid flow in the pipeline according to the metering parameters, and send the obtained flow data to the management center server; or / and

[0037] A plurality of any of the aforementioned liquid flow metering components, wherein the processing device in the liquid flow metering components is configured to receive the metering parameters of the management center and the float height data sent by the liquid flow metering device in the receiving component, and the processing device calculates the flow data in the metering pipeline of the corresponding liquid flow metering device based on the float height data sent by each liquid flow metering device according to the metering parameters, and sends it to the management center server.

[0038] The measuring chamber, the liquid inlet pipe and the liquid outlet pipe in the embodiment of the utility model serve as a metering structure, which can be obtained through low-cost casting, stamping and other processes, with low manufacturing cost and long service life; the metering structure can be processed into an integrated cavity, and is connected to the sleeve by welding during assembly, so that the measured liquid will not leak, and the external liquid is prevented from penetrating into the metering structure, which can better adapt to the application environment; the float in the device operates stably, and the position detection device can sense the position of the detection part at the end of the float connecting rod in real time to obtain the precise liquid rising height, and the metering accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Below, the preferred embodiments of the present invention will be further described in detail with reference to the accompanying drawings, wherein:

[0040] Figure 1 It is a structural general assembly diagram of a flow metering device according to an embodiment of the utility model;

[0041] Figure 2 It is a structural exploded diagram of a flow metering device according to an embodiment of the utility model at a viewing angle;

[0042] Figure 3 is a structural exploded diagram of a flow metering device according to an embodiment of the utility model at another viewing angle;

[0043] Figure 4 is a top view of a metering structure according to an embodiment of the utility model;

[0044] Figure 5 yes Figure 4 AA section view of the structure shown;

[0045] Figure 6 yes Figure 2 A in the enlarged view;

[0046] Figure 7is a top view of a metering structure according to another embodiment of the utility model;

[0047] Figure 8 yes Figure 7 AA section view of the structure shown;

[0048] Fig. 9 is a structural exploded view of an electrical component housing in a liquid flow metering device according to another embodiment of the utility model at a viewing angle;

[0049] Fig.10 is a structural explosion diagram of an electrical component housing in a liquid flow metering device according to another embodiment of the utility model at another viewing angle;

[0050] Fig.11 is a partial structural diagram of a metering structure according to another embodiment of the utility model;

[0051] Fig.12 yes Fig.11 A schematic diagram of the structure of the power generation module;

[0052] Fig.13 It is a principle block diagram of an electrical module according to an embodiment of the utility model;

[0053] Fig.14 This is a schematic diagram of the flow calculation principle when the float is a cone according to an embodiment of the utility model;

[0054] Fig.15 is a schematic diagram of a Hall sensor according to an embodiment of the utility model;

[0055] Fig.16 This is a schematic diagram of the principle of a water consumption monitoring system according to the first application embodiment of the utility model;

[0056] Fig.17 is a schematic diagram of the principle of a water consumption monitoring system according to the second application embodiment of the present utility model; and

[0057] Fig.18 It is a schematic diagram of the principle structure of a flow metering component 100a according to the second application embodiment of the present utility model.

[0058] Description of reference numerals:

[0059] 1. Measuring chamber; 11. Measuring chamber body; 111. Connecting seat; 112. Base; 113. Side wall; 114. Upper cover; 115. Edge; 12. Liquid inlet pipe; 121. Horizontal section; 122. Curved section; 123. Vertical section; 13. Liquid outlet pipe; 131. Rotating shaft through hole; 132. Mounting seat; 133. Support;

[0060] 2. float assembly; 21. float; 22. float connecting rod; 221. longitudinal concave surface; 222. balance ridge; 23. first accommodating chamber;

[0061] 3. Sleeve; 31. Guide channel; 32. Second accommodating chamber;

[0062] 4. Electrical components; 411. Shell base; 412. Cover; 413. Mounting column; 414. Sleeve through hole; 415. Mounting hole; 416. Concave area; 417. Concave area; 418. Baffle; 419. Vertical plate; 420. Backup battery compartment; 421. Circuit board; 422. Circuit board tray; 430. Through hole; 431. Compartment cover connector; 432. Compartment cover; 433. Antenna accommodating cavity; 441. Stator support; 442. Mover support; 443. Spring; 444. Guide rod; 445. Wire channel; 45. Vibration power generation module; 451. Stator; 452. Mover; 453. Coil;

[0063] 51. ball valve; 52. ball valve shaft; 53. ball valve mounting seat; 54. sealing ring; 55. connecting joint;

[0064] 61. a first battery; 62. a second battery;

[0065] 10. Measuring body; 100a. Flow metering component; 20. Water meter; 20a. Flow metering device; 21a. Processing device; 211a. Display screen; 212a. Button; 30. Communication link; 40. Management center. DETAILED DESCRIPTION

[0066] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0067] In the following detailed description, reference may be made to the various specification drawings that are used to illustrate specific embodiments of the present application as part of the present application. In the accompanying drawings, similar figure numerals describe substantially similar components in different figures. The various specific embodiments of the present application are described in sufficient detail below so that a person of ordinary skill in the art with relevant knowledge and skills in the art can implement the technical solutions of the present application. It should be understood that other embodiments may also be utilized or structural, logical or electrical changes may be made to the embodiments of the present application. In addition, the "first", "second", etc. in the names of some technical features in the embodiments of the present utility model are only used to distinguish technical features of the same name, rather than being a limitation of the order.

[0068] See also Figure 1 , Figure 1 This is a general assembly diagram of a flow metering device according to an embodiment of the utility model. Figure 2 It is a structural exploded diagram of a flow metering device according to an embodiment of the utility model at a viewing angle; Figure 3 It is a structural exploded view of a flow metering device according to an embodiment of the utility model from another perspective. The flow metering device comprises a measuring chamber 1, a float assembly 2, a sleeve 3 and an electrical assembly 4, wherein the measuring chamber 1, the float assembly 2 and the sleeve 3 are combined together to form a core metering structure, see Figure 4 , Figure 4 is a top view of a metering structure according to an embodiment of the utility model, Figure 5 yes Figure 4 AA section view shown. Figures 1 to 3 , combined with Figure 4 and Figure 5 The measuring chamber body 11 of the measuring chamber 1 is connected with the liquid inlet pipe 12 and the liquid outlet pipe 13 by welding, and the liquid inlet pipe 12 extends into the measuring chamber body 11, and the liquid outlet at the end faces upward. In addition, the measuring chamber body 11, the liquid inlet pipe 12 and the liquid outlet pipe 13 can also be integrally cast by a mold.

[0069] In this embodiment, the measuring chamber body 11 is cylindrical, and a connection seat 111 is formed on the top by processing to remove a circle of inner wall of a certain thickness, and the liquid inlet pipe 12 and the liquid outlet pipe 13 are connected to the lower part of the side of the cylinder, and the two are located at the same radial position of the cylinder, and the angle between the two is a straight angle. However, it should be noted that the structure of the measuring chamber 1 is not limited to this. For example, the shape of the measuring chamber body 11 and the connection parts of the liquid inlet pipe 12 and the liquid outlet pipe 13 on the measuring chamber body 11 can be determined according to the installation position in actual application. For example, the shape of the measuring chamber body 11 can be a prism to adapt to the installation position, and the connection parts of the liquid inlet pipe 12 and the liquid outlet pipe 13 on the measuring chamber body 11 can be located on the same plane or on different planes staggered up and down, and the angle between the two can be any angle except a straight angle, such as a 90-degree angle.

[0070] In this embodiment, the liquid outlet pipe 13 includes a contraction portion and a straight portion. The first end of the contraction portion is connected to the measuring chamber body 11. Starting from the first end, the inner diameter of the pipe gradually contracts, and the second end is connected to the straight portion. The inner diameter of the pipe of the straight portion is the same. A mounting seat 132 is provided outside the straight portion, and a rotating shaft through hole 131 is provided at the center of the mounting seat 132, which is connected to the inside of the pipe of the straight portion. Two connecting parts are provided on the surface of the mounting seat 132, wherein a through hole is provided, which is used to be fixed to the bottom of the housing 41 by connecting parts such as bolts and screws. A valve is provided inside the pipe of the straight portion, which is a ball valve 51 in this embodiment. One end of the ball valve rotating shaft 52 is fixed to the ball valve 51, and the other end extends to the outside of the liquid outlet pipe 13 through the rotating shaft through hole 131, which is used to connect with the driving component. The ball valve shaft 52 serves as the actuator of the ball valve 51. Under the action of external force, the position of the ball valve 51 in the pipeline is controlled. When the channel inside the ball valve 51 is in the same direction as the pipeline, the ball valve 51 is in an open state, connecting the pipelines at both ends of the ball valve 51. When the ball valve 51 rotates 90 degrees driven by the ball valve shaft 52, the channel inside the ball valve 51 is 90 degrees with the pipeline, and the ball valve 51 is in a closed state, blocking the pipelines at both ends of the ball valve 51. In order to install the ball valve 51 in the liquid outlet pipeline 13, a ball valve mounting seat 53 and a connecting joint 55 with threads (commonly referred to as a thread head in the industry) are also included. The ball valve mounting seat 53 is arranged inside the first end of the connecting joint 55, and is connected to the straight portion of the liquid outlet pipeline 13 through threads. In order to prevent liquid leakage, a sealing ring 54 is also arranged between the ball valve mounting seat 53 and the first end of the connecting joint 55. Although no connection joint is provided on the liquid inlet pipe 12 in this embodiment, according to common sense in the art, a connection joint may also be provided at the end of the liquid inlet pipe 12 to facilitate connecting the device to the pipe system to be measured in the application. In this embodiment, since a valve is provided inside the pipe of the straight portion, and a corresponding driving component is also provided in the upper housing, such as the motor module in this embodiment, the weight of the pipe corresponding to the straight portion is relatively large, and the bottom end of the pipe of the straight portion is not in the same plane as the bottom of the measuring chamber body 11, a support 133 is provided at the bottom end of the pipe of the straight portion to increase the overall stability of the device.

[0071] The float assembly 2 includes a float 21 and a float connecting rod 22 integrally connected thereto. The float 21 is a solid conical structure. Specifically, as shown in the figure, the float 21 is integrally formed by a lower cone with a vertex pointing downward and an upper cone with a vertex pointing upward on a common bottom surface. In this embodiment, the vertex angle of the lower cone is smaller than the vertex angle of the upper cone, and the float connecting rod 22 is arranged at the vertex angle of the upper cone, thereby obtaining an axisymmetric float assembly 2. Since the side of the float 21 is a smooth arc, the resistance of the liquid is reduced, and the axisymmetric structure and the smooth arc-shaped side increase the operating stability of the float 21 during the rising process. In one embodiment, the junction of the upper cone and the lower cone can also be smoothed to form an arc shape. Since the maximum cross-sectional area of ​​the float is larger than the cross-sectional area of ​​the liquid outlet at the end of the liquid inlet pipe 12, when the float 21 is placed on the liquid outlet at the end of the liquid inlet pipe 12, most of the lower cone is placed in the liquid inlet pipe 12. When there is no liquid push, the float 21 closes the liquid outlet of the liquid inlet pipe 12. When pushed by the liquid, the float 21 is lifted upward to open the liquid outlet, so that the liquid can flow out of the liquid outlet into the measuring chamber body 11.

[0072] In this embodiment, the float connecting rod 22 is composed of three sections of cylinders with increasing cross-sectional radius. The first section of the cylinder with the smallest cross-sectional radius is a cylinder, and its end is the first end of the float connecting rod 22. It extends from the vertex of the upper cone of the float 21 to the inside and is fixed to the float 21, for example, by threading or bonding. The second section adjacent to the first section of the cylinder is a truncated cone. The third section of the cylinder adjacent to the truncated cone has the largest cross-sectional radius, and its end serves as the second end of the float connecting rod 22. The second end is provided with a first accommodating cavity 23 recessed from the end surface to the inside, which is used to place the magnet serving as the detection part. Figure 6 , Figure 6 yes Figure 2 The outer surface of the third section of the column is also provided with four symmetrical longitudinal concave surfaces 221, and the middle area of ​​two adjacent longitudinal concave surfaces 331 constitutes a balance ridge 222, thereby further increasing the stability of the float when it rises.

[0073] The sleeve 3 is an inverted funnel structure, the lower end of which is sealed and connected to the measuring chamber body 11, and the inner part of the upper funnel neck is a guide channel 31. The end of the float connecting rod 22 extends from the lower end of the sleeve 3 into the guide channel 31 inside the sleeve. The length of the guide channel 31 is greater than the maximum distance of the float 21 rising, and the diameter of the guide channel 31 is greater than the maximum diameter of the end of the float connecting rod 22. Therefore, it can guide the movement trajectory of the float connecting rod 22 during the upward movement of the float 21 driven by the liquid, and will not affect the longitudinal movement of the float connecting rod 22, thereby ensuring the accuracy of the rising height of the float, thereby ensuring the accuracy of the measurement. A second accommodating chamber 32 is provided at the top of the sleeve 3 for installing a position detection device. In one embodiment, the position detection device is a Hall sensor, which can output an analog signal corresponding to the position of the magnet provided at the end of the float connecting rod 22. The analog signal is a voltage signal or a current signal, and the voltage value or current value of the analog signal is proportional to the sensing distance. Since the position of the Hall sensor is always fixed and the original position of the magnet is fixed, during the measurement process, the sensing distance of the Hall sensor to the magnet is determined by the long rise distance (i.e., height) of the float 21, and the sensing distance corresponds to the height of the float. Therefore, the sensing distance can be obtained according to the voltage value or current value output by the Hall sensor, and thus the rising distance of the float 21 is also obtained. A connecting structure 33 protruding from the side wall is provided on the side wall of the funnel structure, and a side mounting hole is provided thereon, which can be fixedly connected to the housing of the electrical component 4 by bolts, screws and other connecting parts.

[0074] During assembly, the float assembly 2 is first placed on the liquid outlet of the liquid inlet pipe 12 of the measuring chamber 1, and then the top end of the float connecting rod 22 is extended into the guide channel 31 inside the sleeve 3, and the lower end cover of the sleeve 3 is placed on the built-in connecting seat 111 on the top of the measuring chamber body 11 and fixed by welding, thereby forming a metering structure that prevents liquid leakage.

[0075] The electrical assembly 4 includes a housing and an electrical module, a battery and a motor module disposed inside the housing. The electrical module is disposed on a circuit board 421, and the circuit board 421 is mounted on a circuit board tray 422. The housing includes a housing base 411 and a cover 412, and a plurality of mounting posts 413 are disposed on the housing base 411 and the cover 412, and mounting holes are disposed on the mounting posts 413. The circuit board tray 422 is provided with mounting holes, and the circuit board tray 422 is fixed to two mounting posts 413 disposed on the cover 412 by connecting members such as bolts and screws. The bottom shape of the housing base 411 is a stepped shape that matches the outer shape of the metering structure, wherein the upper step surface is above the measuring chamber 1, and the lower step surface is above the liquid outlet pipe 13. A sleeve through hole 414 is disposed at a position opposite to the sleeve 3 in the upper step surface, so that the funnel neck at the top of the sleeve 3 extends into the housing space through the sleeve through hole 414, and when the cover 412 is covered, a sleeve built-in space is formed. The mounting holes 415 opened on both sides of the sleeve through hole 414 are opposite to the mounting holes on the connecting structure 33 on the side wall of the sleeve. After the funnel neck of the sleeve 3 is extended into the shell base 411 through the sleeve through hole 414, bolts, screws and other connecting parts are used to fix it to the connecting structure 33 on the side wall of the sleeve through the mounting holes 415.

[0076] Since the present embodiment also includes two batteries as power modules, a concave area 416 with a downward arc is provided next to the sleeve through hole 414, and correspondingly, a convex area 417 with an upward arc is provided at a corresponding position inside the cover 412, and a baffle 418 is provided next to the convex area 417. The concave area 416, the convex area 417 and the baffle 418 surround a first battery accommodating compartment for placing the first battery 61. Two parallel and parallel vertical plates 419 are provided in the space corresponding to the lower step surface of the shell base 411, and a concave arc is provided on the top of the vertical plates 419. The arcs of the two vertical plates 419 can fix the second battery 62. The motor module 423 is installed inside the space formed by the two vertical plates 419 and the shell base. Corresponding to the position of the output shaft of the motor module 423, a through hole 430 is provided at the bottom of the shell base 411, and the ball valve shaft 52 is connected to the output shaft of the motor module 423 through the through hole 430 at the bottom of the shell base 411, so that the ball valve 51 can be opened or closed under the control of the motor module 423.

[0077] In this embodiment, the components on the circuit board 421 in the electrical module are powered by the first battery 61, and the signal line of the position detection device installed in the second accommodating cavity 32 at the top of the sleeve 3 is electrically connected to the circuit board 421. The motor module 423 is powered by the second battery 62, and its signal line is electrically connected to the circuit board 421. In one embodiment, a plug-in interface is provided on the circuit board 421, and the ends of the signal line of the position detection device and the signal line of the motor module 423 are connected to corresponding interfaces, so as to facilitate electrical connection during installation.

[0078] In one embodiment, in order to prevent the position detection device from being subjected to electromagnetic interference, a shielding layer is provided in the built-in space ring of the sleeve in the housing to prevent external electromagnetic interference. In this embodiment, the position detection device is located at the top of the sleeve 3, and the cover body 412 has a large cover body depth, so the material of the cover body 412 is a material with electromagnetic shielding effect, such as metal lead. Of course, a shielding sleeve can also be added separately, or, when the cover body depth is small, the materials of the housing base 411 and the cover body 412 can both be materials with electromagnetic shielding effect.

[0079] Figure 7 is a top view of a metering structure according to another embodiment of the utility model; Figure 8 yes Figure 7 AA sectional view of the structure shown. In this embodiment, the measuring chamber body 11 includes a base 112, a side wall 113 and an upper cover 114, the top of the base 112 is sealed and connected to the bottom of the side wall 113, the top of the side wall 113 is sealed and connected to the bottom of the upper cover 114, and the side wall of the cylindrical structure formed by the base 112 and the side wall 113 is provided with a liquid inlet and a liquid outlet, which are respectively sealed and connected to the liquid inlet pipe 12 and the liquid outlet pipe 13. In this embodiment, the upper cover 114 is truncated cone-shaped as a whole, and the diameter of the bottom of the truncated cone is greater than the diameter of the top of the truncated cone. The top of the truncated cone of the upper cover 114 has a through hole, and the bottom of the sleeve 3 is sealed and connected to the through hole. The bottom of the upper cover 114 has a curved upward edge 115, and since the curved upward edge 115 at the bottom forms a mounting collar with the truncated cone side wall of the upper cover 114, it can be fixed to the bottom of the shell base 411 of the first shell in the electrical component by welding, bonding, etc. The truncated cone-shaped upper cover 114 provides more moving space for the float, thereby increasing the metering range without increasing the volume of the measuring chamber 1. Of course, when there is enough space in the measuring chamber 1, the upper surface of the upper cover 114 may also be a plane.

[0080] In this embodiment, the liquid inlet pipe 12 includes a horizontal section 121 extending horizontally from the side wall 113 of the measuring chamber body 11 into the interior of the measuring chamber body 11, a vertical section 123 with the terminal liquid outlet facing upward, and a curved section 122 in the middle, wherein the length of the vertical section 123 is not less than the effective length of the float 21. The effective length refers to the length h1 from the liquid outlet to the bottom of the float 21 when the float 21 is located on the liquid outlet of the vertical section 123 and the liquid outlet is closed when not being measured, thereby ensuring the accuracy of calculating the flow rate during measurement.

[0081] In this embodiment, the maximum curvature radius of the side wall of the curved section 122 is not greater than the radius of the measuring chamber body 11. When preparing the liquid inlet pipe 12, increasing the maximum curvature radius of the side wall of the curved pipe 122 can reduce the difficulty of preparation, and can buffer the inertia of the liquid when it enters the pipe and changes the flow direction, and reduce the noise generated by the liquid hitting the pipe wall. In order to increase the convenience of connecting with the pipeline, the liquid inlet of the liquid inlet pipe 12 is prepared with threads for connecting with other components or pipelines.

[0082] Fig. 9 This is a structural exploded view of the electrical component housing in a liquid flow metering device according to another embodiment of the utility model at a certain viewing angle. Fig.10 It is a structural exploded view of the housing of the electrical component in the liquid flow metering device according to another embodiment of the utility model from another perspective. Compared with the previous embodiment, the electrical component in this embodiment includes a first battery 61 and a backup battery (not shown in the figure), and the placement position of the first battery 61 is the same as that of the previous embodiment, that is, through two. Therefore, a backup battery compartment 420 is provided on the housing base 411 for placing the backup battery. A compartment cover connector 431 is provided on the cover body 412, and the compartment cover 432 is threadedly connected to the compartment cover connector 431. In addition, an antenna accommodating cavity 433 is provided on the cover body 412 in this embodiment for placing the antenna to facilitate wireless transmission.

[0083] Fig.11 is a partial structural diagram of a metering structure according to another embodiment of the utility model; Fig.12 yes Fig.11 In this embodiment, a plurality of vibration power generation modules 45 are arranged in the measurement chamber. Fig.11 Only one is shown in the figure. Depending on the power generation requirements, Fig.11There may be multiple vibration power generation modules 45. Specifically, in this embodiment, a stator support 441 is provided on the measurement chamber body 11 and the side wall 113 by welding or the like, and a wire channel 445 is provided above the vibration power generation module 45 on the measurement chamber body 11 and the side wall 113 by welding or the like, and the wire channel 445 extends upward along the side wall 113 into the housing of the electrical component 4. Fig.12 , the vibration power generation module 45 includes a stator 451, a mover 452 and a coil 453. In this embodiment, the stator 451 and the mover 452 are composed of an iron core and a permanent magnet, and the stator 451 and the mover 452 form a magnetic field. The coil 453 is wound around the mover 452, and of course it can also be wound around the stator 451. This embodiment is only used as an example. The stator 451 is fixed on the stator support 441, the mover 452 is fixed on the mover support 442, and the two supports are connected by a spring 443. In order to stabilize the moving trajectory of the mover, a guide rod 444 is also connected between the two supports. Among them, one end of the guide rod 444 is fixed on the stator support 441 or the mover support 442, and the other end passes through the hole on the mover support 442 or the stator support 441. When the liquid enters the measuring chamber and generates up and down vibrations, the guide rod 444 can control the mover 452 to vibrate only in the vertical direction. When the mover 452 vibrates up and down following the liquid, the magnetic field changes, and current is induced in the coil 453 in the magnetic field. The end of the coil 453 is connected to the wire as the current output end, and the wire is led to the electrical component housing through the wire channel 445.

[0084] In this embodiment, the first battery in the housing of the electrical component for supplying power to the electrical element is a rechargeable battery, the electrical component includes a power management module and a large capacitor for storing power, the power management module includes a charging management terminal, a charging control terminal and a storage terminal, wherein the current output terminal of the vibration power generation module 45 is electrically connected to the charging management terminal of the power management module via a wire channel, the charging control terminal is electrically connected to the charging terminal of the first battery 61, and the storage terminal is electrically connected to the charging terminal of the large capacitor. The power management module can detect the power of the large capacitor and the first battery 61, and when the power of the first battery 61 is sufficient and the power of the large capacitor is not full, the charging management terminal and the storage terminal are connected to charge the large capacitor and store the generated power in the large capacitor; when the power of the first battery 61 is insufficient, the charging management terminal and the charging control terminal can be connected, the power generated by the vibration power generation module 45 can be directly charged to the first battery 61, and can also receive the discharge terminal of the large capacitor and the charging terminal of the first battery 61, and the large capacitor can charge the first battery 61.

[0085] The number and installation position of the vibration power generation modules 45 in this embodiment are only a specific embodiment, and can be modified accordingly according to the specific structure of the measuring chamber. For example, multiple vibration power generation modules 45 are arranged on the side wall surrounding the measuring chamber to increase the power generation; or, the stator is arranged at the top and the mover is arranged at the bottom; or coils for inducing current are wound around the mover and the stator; or, the vibration power generation module 45 is arranged on the side wall of the measuring chamber near the top, etc.; or, in order to avoid the influence of the magnetic field in the vibration power generation module 45 on the position detection device for detecting the height of the float, a shielding cover can also be provided for the vibration power generation module 45. For example, when casting the measuring chamber 1, a double-side wall structure is cast, and the vibration power generation module 45 is arranged in the space between the double side walls, and the bottom of the inner wall is open to allow liquid to enter the space between the double side walls.

[0086] The power generation module in this embodiment uses the vibration generated when the liquid flows to generate electricity, which does not affect the measurement of the flow rate, and fully utilizes the vibration energy generated when the liquid flows, converts it into electricity to power the device, which is energy-saving and environmentally friendly.

[0087] See also Fig.13 , Fig.13 4 is a block diagram of the principle of an electrical module according to an embodiment of the utility model. The electrical module in this embodiment includes a first processing unit 401, a human-machine interface 402 and a first communication unit 403, wherein the first processing unit 401 is composed of a microprocessor or a signal processor and its peripheral circuits. The human-machine interface 402 in this embodiment is, for example, a display screen, which is mounted on the upper surface of the cover 412 of the shell. The first processing unit 401 receives the float height signal detected by the position detection device 404, processes it to obtain the corresponding height, and then calculates the flow rate of the liquid according to the preset calculation formula.

[0088] See also Fig.14 , Fig.14 This is a schematic diagram of the flow calculation principle when the float is a cone according to an embodiment of the utility model. It is a schematic diagram of the vertical section of the liquid inlet pipe 12 and the longitudinal section of the cone under the float 21. The vertical section of the liquid inlet pipe 12 is a straight cylinder. During measurement, the float 21 moves upward under the action of the liquid. When the float 21 is balanced by force in the liquid inlet pipe 12, it stabilizes at a height. At this time, the height that the float 21 rises is h. The volume flow calculation formula (1-1) is:

[0089]

[0090] q v is the volume flow rate; α is the flow coefficient of the device, which is a constant determined by experiment; g is the acceleration of gravity; V f is the volume of the float; ρ f is the density of the float material; ρ is the density of the liquid being measured; Ff is the working cross-sectional area of ​​the float at the current measuring position; ΔF is the flow annular area; R is the angle between the generatrix of the lower cone of the float and the height, in one embodiment, its range is 20-60 degrees; h is the height of the float rising from the lowest position to the current measurement position. f is the working cross-sectional radius of the cone when the float rises to the current measuring position; Rp is the working radius of the liquid outlet at the top of the liquid inlet pipe.

[0091] Where, ΔF=πRp 2 -F f (1-2)

[0092]

[0093]

[0094] Substituting the above three formulas into formula (1-1), we get the following formula (1-5):

[0095]

[0096] In formula 1-5, except for the height h of the float rising from the lowest position to the current measuring position, other parameters are known parameters. When the height h of the float 21 rising is detected by the position detection device, the instantaneous flow rate of the measured liquid can be calculated by formula (1-5), and the cumulative flow rate over a period of time can be obtained by the following formula (1-6).

[0097]

[0098] Among them, Q t represents the accumulated flow at time t, Q0 represents the accumulated flow at time t=0, and q t It represents the instantaneous flow at time t, where t represents time (unit: s).

[0099] The position detection device 404 detects the height of the float 21 and sends the height information to the first processing unit 401 in the form of a continuous analog signal.

[0100] Fig.15 4 is a schematic diagram of a Hall sensor according to an embodiment of the utility model. In this embodiment, the position detection device 404 is a Hall sensor, which includes a Hall element 4041 and an amplifier 4042. The Hall element 4041 converts the sensed magnetic flux into a voltage and outputs it to the amplifier 4042. The amplifier 4042 amplifies the voltage output by the Hall element 4041 and outputs it. Fig.15Only the basic components of the Hall sensor are shown, and other components such as voltage regulators and the like may be provided as needed. The magnet in the utility model (i.e., the detection part placed at the end of the float connecting rod) may be a permanent magnet with strong magnetic properties, such as a neodymium iron boron magnet, a samarium cobalt magnet, an aluminum nickel cobalt magnet, etc. Since the Hall sensor in the utility model can output a linear voltage, and the Hall sensor is installed in the second accommodating chamber 32 at the top of the sleeve 3 whose position remains unchanged, the linear voltage corresponds to the distance between the magnet at the top of the end of the float connecting rod 22 and the Hall sensor, that is, the distance the float rises, and the height measurement is accurate.

[0101] The first processing unit 401 calculates the instantaneous flow rate of the measured liquid and the cumulative flow rate over a period of time based on the built-in logical algorithm, such as the aforementioned formula (1-5) or formula (1-6). The various parameters used in the calculation can be written together when the calculation program is loaded into the processing chip of the first processing unit 401, or can be received by authorized staff through the human-computer interaction interface 402, or receive parameter data sent by the management center through the first communication unit 403.

[0102] The human-machine interaction interface 402 may include only a display screen, or may be composed of a display screen and buttons, or may be a touch screen. The display screen may display data such as instantaneous and cumulative flow rates, and may also display related information such as device information, liquid information, and the like.

[0103] In this embodiment, the first communication unit 403 is, for example, a mobile communication unit, which can access a mobile communication network and report flow data to the management center via the mobile communication network. The first communication unit 403 is, for example, a GSM module / GPRS module / LTE module supporting 2G, 3G, or 4G networks and a communication module supporting 5G networks, etc., mainly including an antenna, a radio frequency front-end module (RF FEM), a radio frequency transceiver module, and a baseband signal processor, etc. Thereby, the calculated flow data of the measured liquid is transmitted to a distant external device, such as a server in the management center, and the staff does not need to go to the measurement site to read the data. And a mobile communication module accessing a 5G network, etc.

[0104] Application Example 1

[0105] In this embodiment, Figure 1 The flow meter in the system is used as a water meter in the home. When it is used, it is installed in the water supply pipeline of each household. The water supply enterprise (such as the water plant) is equipped with a management center, which includes multiple servers, thus forming a water consumption monitoring system. See Fig.16 , Fig.16Schematic diagram of the water consumption monitoring system according to the first embodiment of the present utility model. In this embodiment, each metering subject 10 (such as a household) is equipped with a water meter 20 in its water supply pipeline. Figures 1 to 6 , the electrical module schematic diagram can be found in Fig.13 Each water meter 20 has a unique identifier and corresponds to the registered address and user name of each metering entity 10. The water meter 20 of each metering entity 10 sends its measured water consumption to the management center 40 via the wireless communication link 30. The management center 40 includes a server or a server cluster, which receives the water consumption sent by the water meter 20 of each metering entity 10 through the wireless communication network and records and stores it, and then calculates the fee based on the water consumption and charges the user.

[0106] When the water meter 20 is installed in the user's household water supply pipeline, since it has not been activated at this time, the first processing unit 401 in the water meter controls the motor module 423 in the water meter 20 to close the ball valve 51. After the user has completed all the procedures, such as registration, setting metering parameters and other related matters, the water supply company supplies water to the user. At this time, the management center 40 sends an opening instruction to the user's water meter 20 through the communication link 30, and at the same time, sends the set related metering parameters, such as metering cycle, data reporting time, etc. to the water meter 20. Among them, the user can log in to the website of the management center 40 through his terminal device, such as a desktop computer, a laptop computer, etc., and register as a water user. The user can also set the metering parameters and other parameters of the water meter, such as the arrears processing method, etc. Of course, the metering parameters can also be set by the staff of the water supply company at the management center according to the user's request.

[0107] The management center 40 sends the set metering parameters to the corresponding water meter 20 through the communication link 30. After receiving the metering parameters, the first processing unit 401 in the water meter 20 determines the metering end date according to the metering cycle and the metering start date, calculates the specific cumulative metering duration, and sets a timer to determine the end time of the current metering cycle. During metering, the instantaneous flow is calculated according to formula 1-5. The cumulative flow can be obtained based on the calculated cumulative metering duration of the metering cycle through formula 1-6, and the flow data of the current metering cycle can be obtained through the second item. After the end of the current metering cycle, the various data are stored and reported to the management center 40 through the communication link 30 through the first communication unit 403 at the set reporting time. After the end of the current metering cycle, the flow metering of the next metering cycle begins. When a user fails to pay the fee on time, the management center 40 stops supplying water to the user according to regulations. At this time, the management center 40 sends a stop instruction to the user's water meter 20 through the communication link 30, and the first processing unit 401 of the water meter 20 controls the motor module 423 in the water meter 20 to close the ball valve 51, thereby stopping supplying water to the user.

[0108] The metering structure of the water meter in this embodiment adopts a fully welded structure, which realizes sealing integration, waterproof and leakproof. In addition, this embodiment can produce the metering structure by stamping or casting. Compared with other processing techniques, the process is simple, the processing cost is low, and the manufactured structural parts are solid and durable. Compared with other processing methods, the service life can be significantly increased. In addition, according to the metering principle, the instantaneous flow rate can be obtained by only determining the height of the float. There are few parameters that affect the measurement, which fundamentally reduces the factors that affect the accuracy of the measurement, so the measurement is accurate. The position detection device can accurately obtain the height of the float. When electromagnetic shielding measures are adopted, external electromagnetic interference is prevented, further increasing the accuracy of the detection signal.

[0109] Application Example 2

[0110] Fig.17 This is a schematic diagram of the principle of the water consumption monitoring system according to the second application example of the utility model. In this embodiment, it includes a management center 40 of a water supply enterprise and multiple flow metering components 100a, and each flow metering component 100a communicates with the management center 40 via a communication link 30. In this application example 2, there are 4 households in each residential unit (such as a floor in a building), and each household is used as a metering subject. The residential unit composed of multiple households is used as a metering subject unit, and one residential unit is installed with one flow metering component 100a. See Fig.18 , Fig.18 It is a schematic diagram of the principle structure of the flow metering component 100 according to the second application embodiment of the utility model. The flow metering component 100a includes multiple flow metering devices 20a and a processing device 21a. A flow metering device 20a is installed in the water inlet pipeline of each household (metering body 10), and the flow metering device 20a of each household is electrically connected to the processing device 21a, such as through a wire connection in this embodiment. It should be noted that it can also be a wireless connection, such as the electrical module of each flow metering device 20a includes a wireless module such as Bluetooth, Wi-Fi or ZigBee as a communication unit.

[0111] The electrical module of the flow metering device 20a in the second application example of the present invention only includes a signal processing unit, which receives the sensing signal sent by the position detection device 404, obtains the height data of the float after preprocessing, and sends it to the processing device 21a. The processing device 21a includes a housing and a processing module. The principle of the processing module is the same as Fig.13The principle shown is the same, including a first processing unit 401, a human-computer interaction interface 402 and a first communication unit 403. In this embodiment, the human-computer interaction interface 402 includes a display screen 211a and a button 212a, and is installed on the housing to facilitate users to check their own water consumption. The first processing unit 401 receives the float height data sent by the flow metering device 20a, and calculates the flow data based on the float height. Among them, when the signal processing unit in the flow metering device 20a sends the float height data, the data sent includes the identifier of the flow metering device 20a. When the processing device 21a receives the data, it extracts the identifier from it, and classifies, calculates, stores, and displays the data based on the identifier. The processing device 21a communicates with the management center through the first communication unit 403, receives the identifiers of the four household users in the component sent by the management center 40, and their respective metering parameters, sends the flow data to the management center 40 according to their respective metering cycles and data reporting times, and receives the start and stop instructions sent by the management center, and controls the opening and closing of the ball valve in the corresponding flow metering device 20a based on the instructions.

[0112] In this application embodiment, according to the application scenario, a household metering and centralized calculation processing method is adopted, and the flow metering device 20a in each household detects the height of the float, and then uses the powerful processing and computing capabilities of the processing chip to complete the calculation of the water flow of four household users by one processing module. Therefore, each flow metering device 20a only needs a signal processing unit, and no display screen is required, which reduces the application of electronic components, thereby further reducing costs.

[0113] Application Example 3

[0114] In this application embodiment, on the basis of the aforementioned application embodiment 1, the electrical module further includes a second communication unit, such as an Internet of Things communication unit for short-range transmission, which establishes a first network with a legitimate external device within the communication range to realize the reception and transmission of data between the legitimate external device. The second communication unit is, for example, a Bluetooth module, a LoRa module, a Zigbee module, etc. At this time, the terminal device of the user or the staff of the management center, such as a mobile phone, a tablet computer or a dedicated reading device, can transmit data with the water meter 20 at a short distance. For example, the user can use the terminal application in his mobile phone to communicate with the water meter 20, which facilitates the user to set metering parameters, read water consumption data, etc.

[0115] Application Example 4

[0116] In this application embodiment, on the basis of the processing device 21a of the second application embodiment, a second communication unit is also included in the processing module, such as an Internet of Things communication unit for short-range transmission, which establishes a first network with a legitimate external device within the communication range to realize the reception and transmission of data between the legitimate external device. The second communication unit is, for example, a Bluetooth module, a LoRa module, a Zigbee module, etc. When the user can communicate with the processing device 21a in the flow metering component 100a using the terminal application in his mobile phone, the processing device 21a also includes an identity authentication step, and after verifying the legitimacy of the user's identity, establishes communication with the user's mobile phone.

[0117] The water meter 20 or the flow metering device 20a in the above four application embodiments may also include a vibration power generation module, such as Fig.11 and Fig.12 The structure in order to achieve the purpose of environmental protection.

[0118] In addition, the flow metering device provided by the utility model can also be applied in other fields, such as sewage treatment systems, pharmaceutical fields, and electronic manufacturing fields. In the application process, the flow coefficient α of the device is determined experimentally according to the measured liquid, that is, the instantaneous flow can be calculated according to the aforementioned calculation formulas 1-5, and the cumulative flow can be calculated according to formulas 1-6. In addition, according to the needs of metering and process control, a combination of various types of devices can be used. For example, when it is not necessary to control the on and off of the pipeline, a ball valve and a corresponding motor module can be omitted; when it is not necessary to view the flow data from the flow metering device, a display screen is not required; when the process control system has a powerful processing chip, the electrical module in the flow metering device only needs to convert the sensed float height detection signal into float height data, and then send the float height data to the process control system, and the process control system calculates the flow.

[0119] The flow metering device provided by the utility model can measure the liquid flow of various different media by modifying the flow coefficient in the calculation formula according to the measured liquid, and has a wide range of uses; the metering structure in the flow metering device is simple and can be obtained through low-cost casting, stamping and other processes, so the manufacturing cost is low and the service life is long; the metering structure can be processed into an integrated cavity, and the connection method with the sleeve is welding, so that neither the measured liquid will be leaked nor the external liquid will penetrate into the metering structure, and it can better adapt to the application environment; the float in the device runs stably, the rising height of the float can accurately represent the rising height of the liquid, and the sensing signal is an analog signal, and its voltage value or current value can accurately correspond to the rising height of the float, so the sensing data is accurate, ensuring the accuracy of the metering structure.

[0120] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of the present invention.

Claims

1. A liquid flow metering device, characterized in that: include: A measuring chamber, wherein the measuring chamber body is sealed to connect a liquid inlet pipe and a liquid outlet pipe, wherein the liquid inlet pipe extends into the measuring chamber body, and a liquid outlet at the end faces upward; The float assembly comprises a float and a float connecting rod integrally connected thereto, wherein the float is placed at the liquid outlet at the end of the liquid inlet pipe, and the float closes the liquid outlet of the liquid inlet pipe when there is no liquid pushing, and the float is lifted upward to open the liquid outlet under the push of the liquid; a detection part is installed at the end of the float connecting rod; A sleeve, the lower end of the sleeve is communicated with the measuring chamber body, the end of the float connecting rod extends from the lower end of the sleeve into the guide channel inside the sleeve, a position detection device is built in the sleeve, when the float connecting rod moves in the guide channel inside the sleeve, the position detection device senses the position of the detection part of the end of the float connecting rod in real time to obtain a float height detection signal; The electrical component comprises a first shell and an electrical module. The first shell comprises a sleeve built-in space for embedding the sleeve. The electrical module receives a float height detection signal sensed by the position detection device.

2. The liquid flow metering device according to claim 1, characterized in that: The sleeve is an inverted funnel structure, the lower end of the inverted funnel structure is sealed and connected to the measuring chamber body, and the interior of the upper tubular structure is a guide channel.

3. The liquid flow metering device according to claim 2, characterized in that: The outer side wall of the inverted funnel structure is provided with a connection structure protruding from the outer side wall, which is used for fixed connection with the first shell of the electrical component.

4. The liquid flow metering device according to claim 1, characterized in that: The measuring chamber body includes a base, a side wall and an upper cover, the top of the base is sealedly connected to the bottom of the side wall, the top of the side wall is sealedly connected to the bottom of the upper cover, a liquid inlet and a liquid outlet are provided on the side wall of the cylindrical structure formed by the base and the side wall, and are respectively sealedly connected to the liquid inlet pipe and the liquid outlet pipe, the top of the upper cover has a through hole, and the bottom of the sleeve is sealedly connected to the through hole; the first shell is fixed on the periphery of the upper cover.

5. The liquid flow metering device according to claim 4, characterized in that: The upper cover is in the shape of a truncated cone, and the diameter of the bottom of the truncated cone is greater than the diameter of the top of the truncated cone.

6. The liquid flow metering device according to any one of claims 1 to 5, characterized in that: The sealed connection is formed by welding.

7. The liquid flow metering device according to any one of claims 1 to 5, characterized in that: The measuring chamber body is integrally cast with the liquid inlet pipe and the liquid outlet pipe.

8. The liquid flow metering device according to any one of claims 1 to 5, characterized in that: The liquid inlet pipe includes a horizontal section extending horizontally from the side wall of the measuring chamber body into the interior of the measuring chamber body, a vertical section with an end liquid outlet facing upward, and a curved section in the middle, wherein the length of the vertical section is not less than the effective length of the float, and the maximum curvature radius of the side wall of the curved section is not greater than the radius of the measuring chamber body.

9. The liquid flow metering device according to claim 1, characterized in that: A valve is provided in the liquid outlet pipe, and correspondingly, a driving component is provided in the electrical component, the driving component is connected to an actuator of the valve, the driving component controls the actuator based on a control instruction, and controls the working state of the valve through the actuator.

10. The liquid flow metering device according to claim 9, characterized in that: The valve is a ball valve, and correspondingly, the driving component is a motor. The actuator of the valve is a ball valve shaft, one end of which is connected to the output shaft of the motor. Based on the rotation of the motor, the ball valve shaft drives the ball of the ball valve to rotate.

11. The liquid flow metering device according to claim 1, characterized in that: The sleeve built-in space is surrounded by a shielding layer. When the sleeve is built in the sleeve built-in space, the sleeve is built in the shielding layer.

12. The liquid flow metering device according to claim 1, characterized in that: The first shell includes a shell base with electromagnetic shielding function and a corresponding cover body, and the shell base includes a sleeve built-in space and an electrical module accommodating compartment.

13. The liquid flow metering device according to any one of claims 1-5, 9-12, characterized in that: The electrical module includes a signal processing unit and a first communication unit. The signal processing unit receives a float height detection signal sent by a position detection device, obtains float height data after preprocessing, and sends the float height data to an external device via the first communication unit, which calculates the liquid flow data.

14. The liquid flow metering device according to any one of claims 1-5, 9-12, characterized in that: The electrical module includes a first processing unit, and correspondingly, a first display screen is installed on the first shell; the first processing unit receives a float height detection signal sent by a position detection device, calculates flow data based on the float height detection signal, and displays the flow data on the first display screen.

15. The liquid flow metering device according to any one of claims 1-5, 9-12, characterized in that: It also includes a power module. Correspondingly, the first shell includes a power accommodating compartment for accommodating the power module.

16. The liquid flow metering device according to claim 15, characterized in that: The power module is one or more batteries, wherein the batteries are disposable batteries or rechargeable batteries.

17. The liquid flow metering device according to claim 16, characterized in that: The first housing includes a spare battery compartment for placing a spare battery; Alternatively, the measuring chamber body further includes a vibration power generation module, the electrical components include a power management module, the current output end of the vibration power generation module is electrically connected to the charging management end of the power management module via a wire channel, and the charging control end of the power management module is electrically connected to the charging end of the rechargeable battery; during the flow metering process, the vibration power generation module uses the vibration induced current generated by the liquid flow.

18. A liquid flow metering component, characterized in that: include: A processing device, comprising a second housing and a processing module, wherein the processing module is built into an electrical compartment in the second housing; A plurality of liquid flow metering devices as claimed in any one of claims 1 to 13, configured to be installed in respective pipelines, to obtain float height data during flow metering, and to send the float height data to the processing device; Wherein, the processing module in the processing device receives the float height data sent by the liquid flow metering device, and calculates and obtains the liquid flow data of the corresponding liquid flow metering device.

19. The liquid flow metering assembly according to claim 18, characterized in that: The processing module includes a second communication unit configured to send flow data of each liquid flow metering device to the management center server and receive control instructions sent by the management center server.

20. The liquid flow metering assembly according to claim 18, characterized in that: A second display screen is installed on the second housing and is configured to display the flow data of each liquid flow metering device calculated by the processing module.

21. The liquid flow metering assembly according to any one of claims 18 to 20, characterized in that: The processing module includes a third communication unit configured to communicate with an external device within a preset distance range.

22. A liquid flow metering system, characterized in that: include: A management center server configured to at least set liquid flow metering parameters and manage flow data; A liquid flow metering device according to any one of claims 1 to 18, configured to receive metering parameters of the management center, measure the liquid flow in the pipeline according to the metering parameters, and send the obtained flow data to the management center server; or / and The liquid flow metering component described in any one of multiple claims 18-21 is configured such that a processing device in the liquid flow metering component receives metering parameters of the management center and receives float height data sent by the liquid flow metering device in the component, and the processing device calculates the flow data in the metering pipeline of the corresponding liquid flow metering device based on the float height data sent by each liquid flow metering device according to the metering parameters, and sends it to the management center server.

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