Multifunctional glass tube rotameter

Abstract

The utility model discloses a multifunctional glass tube rotameter which comprises a body, a Hall sensor and a main board display assembly, the Hall sensor is arranged on the inner wall of the body, the main board display assembly is arranged on the outer side wall of the body, and the multifunctional glass tube rotameter comprises a shell and a main board assembly arranged in the shell. The mainboard assembly is connected with the Hall sensor, and the mainboard assembly comprises a power supply conversion module, a series voltage stabilization module, a single chip microcomputer, a signal acquisition module, a communication isolation module, a communication module and an RS485 terminal, wherein the power supply conversion module supplies power through a 24V terminal, and the series voltage stabilization module supplies power through a two-wire system loop power supply terminal. The device can simultaneously have 4-20mA current signals and RS485 signals through the mainboard assembly, can be compatible with a 24V power supply mode and a two-wire system loop power supply mode, and is relatively low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of glass tube rotor flowmeters, in particular to a multifunctional glass tube rotor flowmeter. Background Art

[0002] The main measuring element of the glass tube rotor flowmeter is a vertically installed 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 top and bottom 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. The height of the float can be used as a flow measurement.

[0003] Ordinary glass tube rotor flowmeters can only use visual scales. Currently, there is a remote transmission glass tube rotor flowmeter on the market. A magnet is installed on the float, and an omnipolar Hall switch sensor chip is used. The measurement principle of the glass tube rotor flowmeter is similar to that of the reed switch and the Hall switch level meter to measure the flow of the glass tube rotor flowmeter. Through the 24V loop power supply method, 4-20mA current is output to transmit the flow. The 4-20mA current signal has the advantages of high accuracy and strong real-time performance, but its disadvantage is that it can only transmit instantaneous flow signals and cannot transmit more parameters. In addition, the access of the 4-20mA current signal to the host computer system such as the PLC and DCS system requires the connection of a dedicated acquisition module, which is expensive. Therefore, a multifunctional glass tube rotor flowmeter that can have both 4-20mA current signal and RS485 signal and is compatible with 24V power supply and two-wire loop power supply is proposed to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a multifunctional glass tube rotor flowmeter.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A multifunctional glass tube rotor flowmeter, comprising a body, a Hall sensor and a mainboard display assembly, wherein the Hall sensor is arranged on the inner wall of the body, and the mainboard display assembly is arranged on the outer wall of the body, comprising a shell and a mainboard assembly arranged in the shell, wherein the mainboard assembly is connected to the Hall sensor, and the mainboard assembly comprises a power conversion module powered by a 24V terminal, a series voltage stabilization module powered by a two-wire loop power supply terminal, a single-chip microcomputer and a signal acquisition module, a communication isolation module, a communication module, and an RS485 terminal;

[0007] The power conversion module supplies power to the first power supply module assembly and the communication module, the output end of the series voltage regulator module is connected to the loop current output module, the loop current output module supplies power to the unidirectional conduction module four, and the first power supply module assembly and the unidirectional conduction module four jointly supply power to the single-chip microcomputer and the signal acquisition module;

[0008] The output end of the series voltage regulator module is connected to the loop current output module, the output ends of the single-chip microcomputer and the signal acquisition module are respectively connected to the input ends of the loop current output module and the communication isolation module, the output end of the loop current output module is also connected to the two-wire loop power supply terminal, and the communication isolation module is connected to the communication module and the RS485 terminal in turn.

[0009] Furthermore, the first power supply module assembly includes a one-way conducting module 1 connected to a power isolation module 1, and the one-way conducting module 1 is connected to the single-chip microcomputer and the signal acquisition module.

[0010] Furthermore, the power conversion module is also connected to the second power supply module assembly, the loop current output module is connected to the one-way conducting module three, the second power supply module assembly and the one-way conducting module three jointly supply power to the display backlight module, and the display backlight module is connected to the display screen arranged on the housing.

[0011] Furthermore, the second power supply module assembly includes a one-way conducting module 2 connected to the power isolation module 2, and the one-way conducting module 2 is connected to the display screen backlight module.

[0012] The beneficial effects of the utility model are:

[0013] The device can have 4-20mA current signal and RS485 signal at the same time through the mainboard component, and is compatible with 24V power supply and two-wire loop power supply, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a system schematic diagram of a mainboard assembly in a multifunctional glass tube rotor flowmeter proposed by the utility model;

[0015] Figure 2 The utility model provides a structural schematic diagram of a multifunctional glass tube rotor flowmeter.

[0016] In the figure: 1. body; 2. Hall sensor; 3. mainboard display component; 31. 24V terminal; 32. two-wire loop power supply terminal; 33. power conversion module; 34. series voltage regulator module; 35. loop current output module; 36. power isolation module one; 37. power isolation module two; 38. unidirectional conduction module one; 39. unidirectional conduction module two; 310. unidirectional conduction module four; 311. unidirectional conduction module three; 312. display backlight module; 313. single-chip microcomputer and signal acquisition module; 314. communication isolation module; 315. communication module; 316. RS485 terminal; 4. shell; 5. display screen. DETAILED DESCRIPTION

[0017] 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.

[0018] Reference Figure 1-2 A multifunctional glass tube rotor flowmeter, comprising a body 1, a Hall sensor 2 and a mainboard display assembly 3, wherein the Hall sensor 2 is arranged on the inner wall of the body 1, and the mainboard display assembly 3 is arranged on the outer wall of the body 1, comprising a shell 4 and a mainboard assembly arranged in the shell 4, wherein the mainboard assembly is connected to the Hall sensor 2, and the mainboard assembly comprises a power conversion module 33 powered by a 24V terminal 31, a series voltage stabilization module 34 powered by a two-wire loop power supply terminal 32, a single-chip microcomputer and signal acquisition module 313, a communication isolation module 314, a communication module 315, and an RS485 terminal 316;

[0019] The power conversion module 33 supplies power to the first power supply module assembly and the communication module 315, the output end of the series voltage regulator module 34 is connected to the loop current output module 35, the loop current output module 35 supplies power to the unidirectional conduction module four 310, and the first power supply module assembly and the unidirectional conduction module four 310 jointly supply power to the single chip microcomputer and the signal acquisition module 313;

[0020] The output end of the series voltage regulator module 34 is connected to the loop current output module 35, and the output end of the single-chip microcomputer and signal acquisition module 313 is respectively connected to the input end of the loop current output module 35 and the communication isolation module 314. The output end of the loop current output module 35 is also connected to the two-wire loop power supply terminal 32, and the communication isolation module 314 is connected to the communication module 315 and the RS485 terminal 316 in sequence.

[0021] Furthermore, the first power supply module assembly includes a unidirectional conduction module 38 connected to a power isolation module 36 , and the unidirectional conduction module 38 is connected to the single chip microcomputer and signal acquisition module 313 .

[0022] Furthermore, the power conversion module 33 is also connected to the second power supply module assembly, the loop current output module 35 is connected to the unidirectional conduction module three 311, the second power supply module assembly and the unidirectional conduction module three 311 jointly supply power to the display backlight module 312, and the display backlight module 312 is connected to the display screen 5 arranged on the housing 4.

[0023] Furthermore, the second power supply module assembly includes a second one-way conduction module 39 connected to the second power isolation module 37 , and the second one-way conduction module 39 is connected to the display screen backlight module 312 .

[0024] During use of the device, the 24V power supply outputs a 5V voltage from the 24V terminal through the power conversion module to power the RS485 communication module, and the output of the power conversion module is connected to the power isolation module 1 and the power isolation module 2 to output two isolated 5V voltages respectively; the two-wire loop power supply is connected to the 5V series voltage regulator module to output a 5V voltage, and then connected to the loop current output module to output another 5V voltage; the 5V voltage output by the loop current output module and the 5V voltage output by the power isolation module 1 are jointly powered by the single-chip control and signal acquisition module through the unidirectional conduction module 4 and the unidirectional conduction voltage 1; the single-chip control and signal acquisition module outputs the current value corresponding to the instantaneous flow rate to the loop current output module after measurement and calculation to realize the 4-20mA current output function; the single-chip control and signal acquisition module is connected to the communication module through the communication isolation module to realize the RS485 communication function.

[0025] The 5V voltage output by the series voltage regulator module and the 5V voltage output by the power isolation module 2 are respectively supplied to the LCD backlight through the unidirectional conduction module 2 and the unidirectional conduction voltage module 3 to light up the LCD backlight, ensuring that the backlight is lit when the two-wire power supply or 24V power supply is used.

[0026] The device can have 4-20mA current signal and RS485 signal at the same time, and is compatible with 24V power supply and two-wire loop power supply, and the cost is low.

[0027] 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 multifunctional glass tube rotor flowmeter, comprising a body (1), a Hall sensor (2) and a mainboard display assembly (3), wherein the Hall sensor (2) is arranged on the inner wall of the body (1), and the mainboard display assembly (3) is arranged on the outer wall of the body (1), comprising a housing (4) and a mainboard assembly arranged in the housing (4), wherein the mainboard assembly and the Hall sensor (2) are electrically connected, and characterized in that: The mainboard assembly comprises a power conversion module (33) powered by a 24V terminal (31), a series voltage regulator module (34) powered by a two-wire loop power terminal (32), a single-chip microcomputer and signal acquisition module (313), a communication isolation module (314), a communication module (315), and an RS485 terminal (316); The power conversion module (33) supplies power to the first power supply module component and the communication module (315); the output end of the series voltage regulator module (34) is connected to the loop current output module (35); the loop current output module (35) supplies power to the unidirectional conduction module four (310); the first power supply module component and the unidirectional conduction module four (310) jointly supply power to the single chip microcomputer and the signal acquisition module (313); The output end of the series voltage stabilization module (34) is connected to the loop current output module (35), the output end of the single chip microcomputer and signal acquisition module (313) is respectively connected to the input end of the loop current output module (35) and the communication isolation module (314), the output end of the loop current output module (35) is also connected to the two-wire loop power supply terminal (32), and the communication isolation module (314) is electrically connected to the communication module (315) and the RS485 terminal (316) in sequence.

2. A multifunctional glass tube rotor flowmeter according to claim 1, characterized in that: The first power supply module assembly comprises a one-way conducting module (38) connected to a power isolation module (36), and the one-way conducting module (38) is connected to the single chip microcomputer and the signal acquisition module (313).

3. A multifunctional glass tube rotor flowmeter according to claim 1, characterized in that: The power conversion module (33) is also connected to a second power supply module assembly, the loop current output module (35) is connected to a unidirectional conduction module three (311), the second power supply module assembly and the unidirectional conduction module three (311) jointly supply power to a display screen backlight module (312), and the display screen backlight module (312) is connected to a display screen (5) arranged on the housing (4).

4. A multifunctional glass tube rotor flowmeter according to claim 3, characterized in that: The second power supply module assembly comprises a second one-way conduction module (39) connected to a second power isolation module (37), and the second one-way conduction module (39) is connected to the display screen backlight module (312).

Images