Liquid flow metering device

Abstract

The utility model relates to a liquid flow metering device which comprises a floater assembly, a liquid detection cylinder, a magnetic induction sensor and a sealing cover, the liquid detection cylinder is covered with the sealing cover so that a detection cavity can be formed in the sealing cover, and a liquid outlet is formed in the side wall of the detection cavity. The floater assembly comprises a floater connecting rod, a floater and a magnet, the liquid detection cylinder comprises a liquid channel, the liquid channel penetrates through the side wall of the detection cavity and extends into the detection cavity, and the channel wall of the liquid channel is formed after the side wall and the bottom surface of the liquid detection cylinder extend; the liquid channel comprises an inlet and an outlet which are located at the two ends respectively, the inlet is located outside the liquid detection cylinder, the direction of the inlet is opposite to the direction of the liquid outlet, and the inlet is a liquid inlet of detected liquid. The liquid flow metering device is simple and compact in structure and convenient to produce and manufacture.

Description

Technical Field

[0001] The present application relates to the technical field of metering devices, and in particular to a liquid flow metering device. Background Art

[0002] Flowmeter is one of the important measuring instruments in process automation instruments and devices. According to the physical properties of the measured medium, it can be divided into liquid flowmeter and gas flowmeter. Among them, there are many types of liquid flowmeters, and the common liquid flowmeters are: vortex flowmeter, turbine flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, volumetric flowmeter, differential pressure flowmeter, rotor flowmeter, open channel flowmeter, Coriolis mass flowmeter, etc.

[0003] However, most of the liquid flow meters in the prior art have complex structures, high manufacturing and production costs, and high requirements for the measurement environment. For example, the measurement site of the vortex flowmeter cannot have vibrations and the flow rate cannot be too low. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the present application proposes a liquid flow metering device, in which the liquid detection cylinder is an integrally formed structure, and the entire liquid metering device has a simple and compact structure and is easy to produce.

[0005] The embodiment of the present application proposes a liquid flow metering device, comprising: a float assembly, a liquid detection cylinder, a magnetic induction sensor and a sealing cover, wherein the sealing cover is covered on the liquid detection cylinder to form a detection chamber inside, and a liquid outlet is opened on the side wall of the detection chamber, wherein the float assembly comprises a float connecting rod and a float and a magnet arranged at both ends of the float connecting rod; the liquid detection cylinder comprises a liquid channel, the liquid channel passes through the side wall of the detection chamber and extends into the detection chamber, and the channel wall of the liquid channel is formed by extending the side wall and bottom surface of the liquid detection cylinder; the liquid channel comprises an inlet and an outlet respectively located at two ends, the inlet is located outside the liquid detection cylinder, and the direction of the inlet is opposite to the direction of the liquid outlet, The inlet is the liquid inlet of the measured liquid; the outlet is located in the detection chamber, and the outlet faces the sealing cover; the float is against the outlet of the liquid channel, and the measured liquid entering the liquid channel from the liquid inlet lifts the float and enters the detection chamber and then flows out through the liquid outlet; the middle area of ​​the sealing cover protrudes outward to form a convex column, the convex column includes a hollow structure and has a predetermined height, the hollow structure is used to accommodate the magnet and the magnet can move along the convex column; wherein when the measured liquid reaches the outlet through the liquid inlet and the liquid channel, it can lift the float together with the magnet; the magnetic induction sensor is arranged near the magnet, and the magnetic induction sensor is used to collect the magnetic field strength of the magnet to determine the flow rate of the measured liquid.

[0006] Optionally, the liquid flow metering device further comprises an electric control box, an open end of the electric control box is inverted on the upper end surface of the sealing cover and fixedly connected to the upper end surface, and the electric control box is used to arrange electronic components.

[0007] Optionally, the side surface of the float connecting rod includes a plurality of ridges arranged along the length direction of the float connecting rod.

[0008] Optionally, the liquid detection cylinder further comprises a liquid inlet flange and a liquid outlet flange, wherein the liquid inlet flange is arranged at the liquid inlet, and the liquid outlet flange is arranged at the liquid outlet.

[0009] Optionally, the liquid detection cylinder is a cylindrical structure, and the sealing cover body is a circular sheet structure.

[0010] Optionally, the electrical control box is a cylinder, and a display screen is provided on the electrical control box, and the display screen is used to display the flow measured by the liquid flow metering device; and a support plate is provided on the back of the display screen, and the support plate is fixed on the electrical control box, and the electronic components are arranged between the display screen and the support plate.

[0011] Optionally, a sensor mounting groove is formed at the top of the boss, and the magnetic induction sensor is fixed in the sensor mounting groove.

[0012] Optionally, the float is a cone, and the float and the float connecting rod are detachably connected via threads.

[0013] Optionally, the outlet of the liquid channel is parallel to the bottom surface of the liquid detection cylinder, and the height value of the outlet to the bottom surface is greater than the distance from the center line of the liquid outlet to the bottom surface.

[0014] Optionally, the liquid channel and the body of the liquid detection cylinder are an integral injection-molded structure.

[0015] The liquid flow metering device proposed in the embodiment of the present application measures the flow of the liquid by detecting the moving distance of the float. The structure of the liquid flow metering device is simple and compact. The liquid detection cylinder and the liquid channel are an integrally formed structure and can be manufactured by injection molding. In addition, the float of the liquid flow metering device proposed in the present application moves in the detection chamber, and the float does not contact the inner wall of the detection chamber. Compared with the prior art in which the float in the conical tube contacts and rubs against the inner wall of the conical tube, the measurement accuracy can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Below, the preferred embodiments of the present application will be further described in detail with reference to the accompanying drawings, wherein:

[0017] Figure 1 is a three-dimensional diagram of a liquid flow metering device according to an embodiment of the present application;

[0018] Figure 2 yes Figure 1 A cross-sectional view of the structure shown along the AA direction;

[0019] Figure 3 It is a structural schematic diagram of a float connecting rod according to an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 100, liquid flow metering device; 101, float assembly; 102, liquid detection cylinder; 104, sealing cover; 105, detection chamber; 107, liquid outlet; 106, liquid inlet; 1011, float connecting rod; 1012, float; 1013, magnet; 1014, convex ridge; 109, liquid channel; 1091, channel wall; 1021, side wall; 1022, bottom surface; 110, boss; 1101, hollow structure; 1102, sensor mounting groove; 112, electric control box; 1023, upper end surface; 1121, display screen; 1123, support plate; 1025, liquid inlet flange; 1026, liquid outlet flange; 1093, inlet; 1094, outlet. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] In the following detailed description, reference may be made to the various specification drawings that are part of the present application and are used to illustrate specific embodiments of the present application. In the accompanying drawings, similar reference numerals describe substantially similar components in different figures. The various specific embodiments of the present application are described below in sufficient detail 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 used or structural, logical or electrical changes may be made to the embodiments of the present application.

[0024] The embodiment of the present application proposes a liquid flow metering device, comprising: a float assembly, a liquid detection cylinder, a magnetic induction sensor and a sealing cover, wherein the sealing cover is covered on the liquid detection cylinder to form a detection chamber inside, and a liquid outlet is opened on the side wall of the detection chamber, wherein the float assembly comprises a float connecting rod and a float and a magnet arranged at both ends of the float connecting rod; the liquid detection cylinder comprises a liquid channel, the liquid channel passes through the side wall of the detection chamber and extends into the detection chamber, and the channel wall of the liquid channel is formed by extending the side wall and bottom surface of the liquid detection cylinder; the inlet of the liquid channel is located outside the liquid detection cylinder, the direction of the inlet of the liquid channel is opposite to the direction of the liquid outlet, and the inlet is a liquid inlet for the liquid to be measured. The outlet of the liquid channel is arranged in the detection chamber, and the outlet of the liquid channel faces the sealing cover; the float is against the outlet of the liquid channel, and the liquid to be measured entering the liquid channel from the liquid inlet lifts the float and enters the detection chamber and then flows out through the liquid outlet; the middle area of ​​the sealing cover protrudes outward to form a convex column, and the convex column includes a hollow structure and has a predetermined height, and the hollow structure is used to accommodate the magnet and the magnet can move along the convex column; wherein when the liquid to be measured reaches the outlet through the liquid inlet and the liquid channel, it can lift the float together with the magnet; the magnetic induction sensor is arranged near the magnet, and the magnetic induction sensor is used to collect the magnetic field strength of the magnet to determine the flow rate of the liquid to be measured.

[0025] The liquid flow metering device proposed in the embodiment of the present application is a float flow metering device, in which the liquid detection cylinder includes a liquid channel, and the channel wall of the liquid channel is formed by extending the side wall and the bottom surface of the liquid detection cylinder. The liquid detection cylinder can be produced by injection molding during production, and the production process is simple and efficient. In addition, the float of the liquid flow metering device proposed in the present application moves in the detection chamber, and the float does not contact the inner wall of the detection chamber. Compared with the prior art in which the float moves in contact with the inner wall of the tapered tube in the tapered tube, the metering accuracy can be improved.

[0026] In some embodiments of the present application, optionally, the liquid flow metering device further comprises an electrical control box, an exposed end of the electrical control box is inverted on the upper end surface of the sealing cover and fixedly connected to the upper end surface, and the electrical control box is used to set electronic components.

[0027] The electronic components and magnetic induction sensors arranged in the electric control box in the liquid flow metering device proposed in the present application are electrically connected. The electronic components determine the distance between the magnet and the magnetic induction sensor based on the magnetic field strength of the magnet sensed by the magnetic induction sensor. When the liquid enters the detection chamber, the liquid lifts the float, and the distance between the magnet located at the end of the float and the magnetic induction sensor changes. The flow rate of the liquid can be determined based on the distance between the magnet and the magnetic induction sensor.

[0028] In some embodiments of the present application, optionally, the side surface of the float connecting rod includes a plurality of ridges arranged along the length direction of the float connecting rod.

[0029] Providing ridges on the side of the float connecting rod can reduce the friction between the float connecting rod and the inner wall of the hollow structure of the convex column, thereby improving the accuracy of the measurement result.

[0030] In some embodiments of the present application, optionally, the liquid detection cylinder further includes a liquid inlet flange and a liquid outlet flange, the liquid inlet flange is arranged at the liquid inlet, and the liquid outlet flange is arranged at the liquid outlet.

[0031] The liquid outlet flange, the liquid inlet flange and the body of the liquid detection cylinder can be an integrally formed structure, and the external pipeline can be fixedly connected to the liquid outlet flange and the liquid inlet flange to achieve liquid measurement.

[0032] In some embodiments of the present application, optionally, the liquid detection cylinder is a cylindrical structure, and the sealing cover body is a circular sheet structure. The liquid detection cylinder is a cylindrical structure, which is symmetrical and has high stability.

[0033] In some embodiments of the present application, optionally, the electric control box is a cylinder, and a display screen is provided on the electric control box, and the display screen is used to display the flow rate measured by the liquid flow metering device; and a support plate is provided on the back of the display screen, and the support plate is fixed on the electric control box, and the electronic component is provided between the display screen and the support plate. By providing the display screen, the liquid metering result can be intuitively seen.

[0034] In some embodiments of the present application, optionally, a sensor mounting groove is formed at the top of the boss, and the magnetic induction sensor is fixed in the sensor mounting groove.

[0035] In some embodiments of the present application, optionally, a sensor mounting groove is opened at the top of the boss, and the magnetic induction sensor is installed in the sensor mounting groove. Installing the magnetic induction sensor at the top of the boss can not only improve the installation stability of the magnetic induction sensor, but also increase the distance between the magnetic induction sensor and the magnet, thereby improving the detection accuracy of the magnetic induction sensor.

[0036] In some embodiments of the present application, optionally, the float is a cone, and the float and the float connecting rod are detachably connected via threads.

[0037] The liquid flow meter proposed in the present application can be made of plastic and used to measure chemical liquids. Therefore, the service life of the float may be shortened and the float needs to be replaced regularly to keep the measurement accuracy within the preset range. Connecting the float and the float connecting rod by threading can make the entire replacement process faster and more convenient.

[0038] In some embodiments of the present application, optionally, the outlet of the liquid channel is parallel to the bottom surface of the liquid detection cylinder, and the height value of the outlet to the bottom surface is greater than the distance from the center line of the liquid outlet to the bottom surface.

[0039] The height value from the outlet of the liquid channel to the bottom surface is greater than the distance from the center line of the liquid outlet to the bottom surface, so that the measured liquid can exert a more stable thrust on the float after flowing out of the outlet of the liquid channel, thereby improving the accuracy of the measurement result.

[0040] In some embodiments of the present application, optionally, the liquid channel and the body of the liquid detection cylinder are an integral injection molding structure.

[0041] The above describes various implementations of the liquid flow metering device of the embodiment of the present application through multiple embodiments. The following describes the structure and operation process of the liquid flow metering device of the embodiment of the present application through multiple specific examples.

[0042] Figure 1 It is a three-dimensional diagram of a liquid flow metering device according to an embodiment of the present application. Figure 2yes Figure 1 The structure shown is a cross-sectional view along the AA direction. Figure 1 and Figure 2 As shown, the liquid flow metering device 100 proposed in the embodiment of the present application includes: a float assembly 101, a liquid detection cylinder 102, a magnetic induction sensor (not shown in the figure) and a sealing cover 104, wherein the sealing cover 104 covers the liquid detection cylinder 102 to form a detection chamber 105 inside, and a liquid outlet 107 is opened on the side wall of the detection chamber 105.

[0043] The float assembly 101 includes a float connecting rod 1011 and a float 1012 and a magnet 1013 disposed at two ends of the float connecting rod 1011 . Figure 3 Schematic diagram of the structure of a float connecting rod in an embodiment of the present application. Figure 2 and Figure 3 As shown, the side of the float connecting rod 1011 includes a plurality of ridges 1014 arranged along the length direction of the float connecting rod. The float 1012 is a cone, and the float 1012 and the float connecting rod 1011 are detachably connected by threads. The liquid detection cylinder 102 includes a liquid channel 109, and the liquid channel 109 extends through the side wall of the detection chamber 105 into the detection chamber 105, and the channel wall 1091 of the liquid channel 109 is formed by extending the side wall 1021 and the bottom surface 1022 of the liquid detection cylinder 102. Among them, the channel wall 1091 of the liquid channel 109 located outside the detection chamber 105 is formed by the side wall 1021 and the bottom surface 1022 of the liquid detection cylinder 102 extending to the outside of the detection chamber 105, and the channel wall 1091 located inside the detection chamber 105 is formed by the side wall 1021 of the liquid detection cylinder 102 extending inward and then upward, and the bottom surface 1022 extending upward.

[0044] The orientation of the inlet 1093 of the liquid channel 109 is opposite to that of the liquid outlet 107. The inlet 1093 of the liquid channel 109 is the liquid inlet 106 of the liquid flow metering device 100. The outlet 1094 of the liquid channel 109 is arranged in the detection chamber 105, and the outlet 1094 of the liquid channel 109 faces the sealing cover 104. The float 1012 is against the outlet 1094 of the liquid channel 109. The measured liquid entering the liquid channel 109 from the liquid inlet 106 lifts the float 1012 and enters the detection chamber 105, and then flows out through the liquid outlet 107. In some embodiments of the present application, optionally, the outlet 1094 of the liquid channel 109 is parallel to the bottom surface 1022 of the liquid detection cylinder 102, and the height value of the outlet 1094 to the bottom surface 1022 is greater than the distance from the center line of the liquid outlet 107 to the bottom surface 1022.

[0045] The middle area of ​​the sealing cover 104 protrudes outward to form a convex column 110, and the convex column 110 includes a hollow structure 1101 and has a predetermined height. The hollow structure 1101 is used to accommodate the magnet 1013 and the magnet 1013 can move along the convex column 110. When the measured liquid reaches the outlet 1094 through the liquid inlet 106 and the liquid channel 109, the float 1012 can be lifted up together with the magnet 1013. A magnetic induction sensor (not shown in the figure) is arranged near the magnet 1013, and the magnetic induction sensor is used to collect the magnetic field strength of the magnet to determine the flow rate of the measured liquid. In some embodiments of the present application, optionally, a sensor mounting groove 1102 is opened at the top of the convex column 110, and the magnetic induction sensor (not shown in the figure) is fixed in the sensor mounting groove 1102.

[0046] Continue to see Figure 2 As shown, the liquid flow metering device 100 also includes an electric control box 112, one open end of the electric control box 112 is inverted on the upper end surface 1023 of the sealing cover 104, and is fixedly connected to the upper end surface 1023, and the electric control box 112 is used to set electronic components. In some embodiments of the present application, optionally, the liquid detection cylinder 102 is a cylindrical structure, and the body of the sealing cover 104 is a circular sheet structure. The electric control box 112 is a cylinder, and a display screen 1121 is provided on the electric control box 112, and the display screen 1121 is used to display the flow measured by the liquid flow metering device. In addition, a support plate 1123 is provided on the back of the display screen 1121, and the support plate 1123 is fixed on the electric control box 112, and the electronic components are arranged between the display screen 1121 and the support plate 1123.

[0047] In some embodiments of the present application, optionally, the liquid detection cylinder 102 further includes a liquid inlet flange 1025 and a liquid outlet flange 1026 , wherein the liquid inlet flange 1025 is disposed at the liquid inlet 106 , and the liquid outlet flange 1026 is disposed at the liquid outlet 107 .

[0048] The above embodiments are only used to illustrate the present application, and are not intended to limit the present application. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the scope of the present application. Therefore, all equivalent technical solutions should also fall within the scope disclosed in the present application.

Claims

1. A liquid flow metering device, characterized in that: include: A float assembly, a liquid detection cylinder, a magnetic induction sensor and a sealing cover, wherein the sealing cover is covered on the liquid detection cylinder to form a detection chamber inside, and a liquid outlet is opened on the side wall of the detection chamber, wherein: The float assembly includes a float connecting rod and a float and a magnet arranged at both ends of the float connecting rod; The liquid detection cylinder comprises a liquid channel, the liquid channel passes through the side wall of the detection chamber and extends into the detection chamber, and the channel wall of the liquid channel is formed by extending the side wall and the bottom surface of the liquid detection cylinder; the liquid channel comprises an inlet and an outlet respectively located at two ends, the inlet is located outside the liquid detection cylinder, the direction of the inlet is opposite to the direction of the liquid outlet, and the inlet is the liquid inlet of the liquid to be detected; the outlet is located in the detection chamber, and the outlet faces the sealing cover; the float is against the outlet of the liquid channel, and the liquid to be detected that enters the liquid channel from the liquid inlet lifts the float and enters the detection chamber and then flows out through the liquid outlet; The middle area of ​​the sealing cover protrudes outward to form a convex column, the convex column includes a hollow structure and has a predetermined height, the hollow structure is used to accommodate the magnet and the magnet can move along the convex column; wherein when the measured liquid reaches the outlet through the liquid inlet and the liquid channel, the float can be lifted up together with the magnet; The magnetic induction sensor is arranged near the magnet, and is used to collect the magnetic field strength of the magnet to determine the flow rate of the measured liquid.

2. The liquid flow metering device according to claim 1, characterized in that: The liquid flow metering device also includes an electric control box, an open end of which is inverted on the upper end surface of the sealing cover and fixedly connected to the upper end surface, and electronic components are arranged in the electric control box.

3. The liquid flow metering device according to claim 1, characterized in that: The side surface of the float connecting rod includes a plurality of ridges arranged along the length direction of the float connecting rod.

4. The liquid flow metering device according to claim 1, characterized in that: The liquid detection cylinder further comprises a liquid inlet flange and a liquid outlet flange, wherein the liquid inlet flange is arranged at the liquid inlet, and the liquid outlet flange is arranged at the liquid outlet.

5. The liquid flow metering device according to claim 2, characterized in that: The liquid detection cylinder is a cylindrical structure, and the sealing cover body is a circular sheet structure.

6. The liquid flow metering device according to claim 5, characterized in that: The electric control box is a cylinder, and is provided with a display screen, which is used to display the flow rate measured by the liquid flow metering device; as well as, A support plate is arranged on the back of the display screen, the support plate is fixed on the electric control box, and the electronic components are arranged between the display screen and the support plate.

7. The liquid flow metering device according to claim 1, characterized in that: A sensor mounting groove is formed at the top of the convex column, and the magnetic induction sensor is fixed in the sensor mounting groove.

8. The liquid flow metering device according to claim 1, characterized in that: The float is a cone, and the float and the float connecting rod are detachably connected via threads.

9. The liquid flow metering device according to claim 1, characterized in that: The outlet of the liquid channel is parallel to the bottom surface of the liquid detection cylinder, and the height value of the outlet to the bottom surface is greater than the distance from the center line of the liquid outlet to the bottom surface.

10. The liquid flow metering device according to claim 1, characterized in that: The liquid channel and the body of the liquid detection cylinder are an integral injection molding structure.

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