High-precision remote transmission type glass tube rotameter
By using a combination of a monopole Hall switch and a magnetic permeable sheet in a glass tube rotor flowmeter, the flow measurement error problem caused by magnetic fields is solved, the measurement accuracy and accuracy of the flowmeter are improved, and the measurement accuracy is achieved. .
Patent Information
- Application Number
- CN202323533073.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2033-12-25
AI Technical Summary
Due to the magnetic field characteristics of the existing glass tube rotor flowmeter, the flow measurement values of the float upward and downward stroke induction positions have large errors, resulting in inaccurate measurements.
Using a monopole Hall switch and a magnetic permeable sheet, by installing two magnetic steel and a magnetic permeable sheet in the middle of the float, and high-density double-sided interlaced arrangement on the sensor assembly, ensuring that the Hall switch only senses one polarity. Magnetic field reduces sensor spacing and improves measurement accuracy.
It effectively reduces the error of the upper and lower stroke measurement values, improves the measurement accuracy and accuracy of the flowmeter, and reduces the error of the flowmeter to within 3% of the full scale.
Smart Images
Figure CN222298875U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of glass tube rotor flowmeters, in particular to a high-precision remote transmission type glass tube rotor flowmeter. Background Art
[0002] The main measuring element of the glass tube rotor flowmeter is a vertically mounted tapered glass tube with a small bottom and a large top and a float that can move up and down inside. When the fluid passes through the tapered glass tube from bottom to top, a pressure difference is generated between the upper and lower parts of the float, and the float rises under the action of this differential pressure. When the rising force, the buoyancy and viscous lift of the float are equal to the gravity of the float, the float is in a balanced position. Therefore, there is a certain proportional relationship between the flow rate of the fluid flowing through the flowmeter and the rising height of the float, that is, the flow area of the flowmeter, and the position height of the float can be used as a flow measurement. Ordinary glass tube rotor flowmeters can only use visual scales. Currently, there is a remote transmission glass tube rotor flowmeter on the market that has a magnet installed on the float, uses an omnipolar Hall switch sensor chip, and adopts a measurement principle similar to that of a reed switch and a Hall switch level meter to measure the flow of the glass tube rotor flowmeter. However, due to the magnetic field characteristics of the magnetic steel, when the float moves up and down, the magnetic field is distributed both up and down, resulting in a large error in the flow value measured at the same flow point in the up and down stroke sensing positions, generally around 3% of the full scale. Therefore, a high-precision remote transmission glass tube rotor flowmeter is proposed to solve the above problem. Utility Model Content
[0003] The utility model aims to solve the shortcomings in the prior art and proposes a high-precision remote transmission type glass tube rotor flow meter.
[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0005] A high-precision remote transmission glass tube rotor flowmeter, comprising a body and a float arranged in the body and capable of moving up and down, a sensor assembly is arranged on the inner wall of the body, the sensor assembly comprises a plurality of Hall switches arranged on both sides of a circuit board, the two sides of the circuit board are respectively a top layer of the circuit board and a bottom layer of the circuit board, and the Hall switches are arranged in a longitudinally uniform array on the top layer of the circuit board and the bottom layer of the circuit board;
[0006] Two magnetic steels are symmetrically arranged in the middle of the float, and a magnetic conductive sheet is arranged between the magnetic steels; the polarities of the opposite sides of the magnetic steels are the same, and the polarity is the same as that of the Hall switch.
[0007] Furthermore, the Hall switch is a small unipolar Hall switch.
[0008] Furthermore, the distance between two adjacent Hall switches on the same side of the top layer and the bottom layer of the circuit board is less than 1 mm.
[0009] Furthermore, the Hall switches on both sides of the top layer and the bottom layer of the circuit board are arranged alternately.
[0010] Furthermore, a sensor sleeve is provided on the outside of the sensor assembly.
[0011] The beneficial effects of the utility model are:
[0012] 1. The unipolar Hall switch is used to sense only one polarity of magnetic field, thus preventing measurement errors caused by different magnetic fields in the up and down strokes and improving measurement accuracy;
[0013] 2. Use small-volume sensors. The sensors are arranged in a high-density double-sided staggered manner, and the interval between two adjacent sensors is less than 1mm, which reduces the distance between sensors and can improve measurement accuracy;
[0014] 3. Install two magnets in the float and a magnetic conductive sheet in the middle. The polarities on the opposite sides are the same. At the same time, the polarity on the opposite side is the same as that of the unipolar Hall switch. Clamping the two magnets can narrow the magnetic field for easy measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a structural schematic diagram of a high-precision remote transmission glass tube rotor flowmeter proposed by the utility model;
[0016] Figure 2 This is a schematic diagram of the structure of a circuit board in a high-precision remote transmission glass tube rotor flowmeter proposed by the utility model;
[0017] Figure 3 The utility model provides a structural schematic diagram of a float in a high-precision remote transmission glass tube rotor flowmeter.
[0018] In the figure: 1. body; 2. sensor assembly; 21. top layer of circuit board; 22. bottom layer of circuit board; 23. Hall switch; 3. float; 31. magnet; 32. magnetic conductive sheet; 4. sensor cover. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0020] Reference Figure 1-3A high-precision remote transmission glass tube rotor flowmeter, comprising a body 1 and a float 3 disposed in the body 1 and capable of moving up and down, a sensor assembly 2 is disposed on the inner wall of the body 1, the sensor assembly 2 comprises a plurality of Hall switches 23 disposed on both sides of a circuit board, the two sides of the circuit board are a top layer 21 of the circuit board and a bottom layer 22 of the circuit board, respectively, the Hall switches 23 are disposed in a longitudinally uniform array on the top layer 21 of the circuit board and the bottom layer 22 of the circuit board;
[0021] Two magnets 31 are symmetrically arranged in the middle of the float 3, and a magnetic conductive sheet 32 is arranged between the magnets 31; the polarities of the opposite sides of the magnets 31 are the same, and the polarity is the same as that of the Hall switch 23. Two magnets are installed in the float, and a magnetic conductive sheet is installed in the middle. The polarities of the opposite sides are the same, and the polarity of the opposite side is the same as that of the unipolar Hall switch. The two magnets are clamped, which can narrow the magnetic field and facilitate measurement.
[0022] The Hall switch 23 is a small unipolar Hall switch. The unipolar Hall switch only senses a magnetic field of one polarity, thereby preventing measurement errors caused by different magnetic fields in the up and down strokes and improving measurement accuracy.
[0023] Furthermore, the distance between two adjacent Hall switches 23 on the same side of the top layer 21 and the bottom layer 22 of the circuit board is less than 1 mm.
[0024] The Hall switches 23 on both sides of the top layer 21 and the bottom layer 22 of the circuit board are arranged in a staggered manner. The Hall sensors with small volume are arranged in a high-density double-sided staggered manner, and the interval between two adjacent sensors is less than 1mm, which reduces the distance between sensors and improves the measurement accuracy;
[0025] A sensor sleeve 4 is also disposed outside the sensor assembly 2 .
[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A high-precision remote transmission glass tube rotor flowmeter, comprising a body (1) and a float (3) disposed in the body (1) and capable of moving up and down, a sensor assembly (2) is disposed on the inner wall of the body (1), and is characterized in that: The sensor assembly (2) comprises a plurality of Hall switches (23) arranged on both sides of a circuit board, the two sides of the circuit board being a circuit board top layer (21) and a circuit board bottom layer (22), respectively, and the Hall switches (23) are arranged in a longitudinally uniform array on the circuit board top layer (21) and the circuit board bottom layer (22); Two magnetic steels (31) are symmetrically arranged in the middle of the float (3), and a magnetic conductive sheet (32) is arranged between the magnetic steels (31); the polarities of the opposite sides of the magnetic steels (31) are the same, and the polarity is the same as that of the Hall switch (23).
2. A high-precision remote-transmission glass tube rotor flowmeter according to claim 1, characterized in that: The Hall switch (23) is a small unipolar Hall switch.
3. A high-precision remote-transmission glass tube rotor flowmeter according to claim 2, characterized in that: The distance between two adjacent Hall switches (23) on the same side of the top layer (21) of the circuit board and the bottom layer (22) of the circuit board is less than 1 mm.
4. A high-precision remote-transmission glass tube rotor flowmeter according to claim 3, characterized in that: The Hall switches (23) on both sides of the top layer (21) of the circuit board and the bottom layer (22) of the circuit board are arranged alternately.
5. A high-precision remote-transmission glass tube rotor flowmeter according to claim 1, characterized in that: A sensor sleeve (4) is also provided on the outside of the sensor assembly (2).