CN210242910U

CN210242910U - Remote-transmission electronic differential pressure liquid level meter

Info

Publication number: CN210242910U
Application number: CN201921258475.5U
Authority: CN
Inventors: Lan Mao; 茅澜; Jun Wang; 王军
Original assignee: Sichuan Xinlanshi Electromechanical Instruments Co ltd
Current assignee: Sichuan Xinlanshi Electromechanical Instruments Co ltd
Priority date: 2019-08-06
Filing date: 2019-08-06
Publication date: 2020-04-03
Anticipated expiration: 2029-08-06

Abstract

The utility model discloses teletransmission electron differential pressure level gauge, including the LCD of dress on the gauge stand, the circuit board, the controller of dress on the circuit board, step motor, the step motor drive instrument pointer of dress on the step motor rotation axis, there is the height on the gauge stand, low pressure storehouse, pressure sensor adorns in low pressure storehouse, pressure sensor's height, low pressure end is adorned respectively in the height, in the low pressure storehouse, the inlet port of dress on the high pressure joint on the gauge stand communicates with each other with pressure sensor, the inlet port of dress on the low pressure joint on the gauge stand respectively with pressure sensor, pressure sensing communicates with each other, there is power control module in the controller, MCU control module, the differential pressure sensor module, the optoelectronic isolation module, 4 ~ 20mA signal output module, 485 communication module, LCD, step motor drive instrument pointer. The utility model discloses install and to show gas tank internal gas phase pressure, liquid level height, liquid volume and liquid phase and gaseous pressure differential parameter simultaneously on gas storage tank.

Description

Remote-transmission electronic differential pressure liquid level meter

Technical Field

The utility model relates to a differential pressure level gauge, in particular to teletransmission electron differential pressure level gauge.

Background art:

the existing common mechanical differential pressure liquid level meter is directly installed on a gas storage tank and can only display the differential pressure value of liquid phase and gas phase in the storage tank on site.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming above not enough, provide one kind and install the teletransmission electron differential pressure level gauge that can show the interior gaseous phase pressure of gas pitcher, liquid level height, liquid volume and liquid phase and the pressure differential parameter of gaseous phase and the wired or wireless mode remote monitoring of accessible simultaneously on gas storage tank.

The utility model discloses teletransmission electron differential pressure level gauge realizes like this:

the utility model discloses teletransmission electron differential pressure level gauge, including the gauge stand of taking the dial plate, with gauge stand complex table lid, the LCD of dress on the gauge stand, the circuit board, the controller of dress on the circuit board, fix the step motor on the circuit board, the dress is at step motor drive instrument pointer on the step motor rotation axis, there is high-pressure storehouse on the gauge stand, low pressure storehouse, pressure sensor installs in low pressure storehouse, differential pressure sensor's height, low pressure end is adorned respectively in high-pressure storehouse, low pressure storehouse, the inlet port on the high pressure joint of dress on the gauge stand communicates with each other with differential pressure sensor, the inlet port on the low pressure joint of dress on the gauge stand communicates with each other with differential pressure sensor respectively, pressure sensing communicates with each other, there is power control module in the controller, the MCU control module who takes the AD converter that links to each other with power control module, the differential pressure sensor module that links to each other with MCU, The pressure sensor module, the photoelectric isolation module connected with the amplification circuit module, the 4-20mA signal output module connected with the photoelectric isolation module, the 485 communication module respectively connected with the output end of the MCU control module, the liquid crystal display and the stepping motor drive instrument pointer.

The remote-transmission electronic differential pressure liquid level meter is provided with a central control room which is respectively communicated with the 485 communication module 4-20mA signal output module through cables.

The remote transmission electronic differential pressure liquid level meter is provided with a wireless remote transmission DTU module which is connected with the 485 communication module and transmits monitoring data to a mobile phone or a computer.

The pressure sensor is characterized in that the pressure sensor and the differential pressure sensor are npc1210, the CPS181 sensor respectively, the power supply control module adopts a 7805/7809 three-terminal voltage stabilizer, the MCU control module adopts a STC12C5A60S2 control module, the amplifying circuit module adopts an INA333 amplifying circuit module, the photoelectric isolation module adopts an HCNR200 photoelectric isolation module, the 4-20mA signal output module adopts an XTR115 signal output module, the 485 communication module adopts an MAX485 communication module, and the liquid crystal display adopts a 12864 liquid crystal screen.

The wireless remote transmission DTU module adopts a GPRS-DTU or 4G-DTU module.

The utility model is arranged on a gas storage tank, high-pressure gas enters a high-pressure bin through a high-pressure gas inlet, low-pressure gas enters a low-pressure bin through a low-pressure gas inlet, a pressure difference is formed between the high-pressure bin and the low-pressure bin, a differential pressure signal is measured by a differential pressure sensor (the signal is a weak signal), then the signal is amplified by an amplifying circuit and is transmitted to an A/D processor of a control module, and an analog signal is converted into a digital signal to be convenient for the controller to process; the low-pressure gas enters the low-pressure bin through the low-pressure gas inlet, the low-pressure bin forms a pressure at the moment, a pressure signal (the signal is a weak signal) is measured through the pressure sensor, then the signal is amplified through the amplifying circuit and is transmitted to the A/D processor of the control module, and the analog signal is converted into a digital signal to be processed by the controller conveniently; and the obtained digital signal is converted into data such as height, volume, weight, percentage, pressure, differential pressure and the like through calculation of the controller, and the data is displayed and is remotely transmitted to a central control room through a 485 module or a 4-20mA module.

The utility model discloses electron teletransmission differential pressure gauge is based on the liquid height in the low temperature container, and the principle of the difference between gas phase and the hydrostatic pressure in the low temperature container is equaled, through measuring the size of static pressure difference to confirm the height of being surveyed liquid.

The utility model discloses the sensing part of electron teletransmission differential pressure gauge is based on displacement balance principle work. When the gas enters a high pressure bin (HP) and a low pressure bin (LP) of the sensing part through a high pressure valve and a low pressure valve respectively during working, the differential pressure sensor generates weak electric signals due to the action of differential pressure, and the electric signals are amplified and then transmitted to the controller to drive the instrument pointer and the liquid crystal screen to display and output digital signals at the same time: and simultaneously, the signals are transmitted to a 4-20mA signal output module through a photoelectric isolation module to output analog signals such as analog output 4-20mA signals (including differential pressure signals); the output digital signals such as digital output various signals (information of differential pressure, volume percentage, weight, temperature, medium and the like) or analog signals can be transmitted to a network or a central control room through the wireless transmission module to be displayed in real time. The digital display liquid level meter can simultaneously display differential pressure; pressure; volume, etc.

The utility model discloses can show gas phase pressure, liquid level height, liquid volume and the pressure differential parameter of liquid phase and gaseous phase in the gas pitcher simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a top view of fig. 1.

Fig. 4 is a diagram of pressure sensor position.

FIG. 5 is a schematic diagram of the positions of the LCD, the circuit board, and the pressure sensor.

FIG. 6 is a schematic diagram of the positions of the high and low pressure connectors and the pressure and differential pressure sensors.

Fig. 7 is a circuit block diagram of the present invention.

Fig. 8 is another circuit block diagram of the present invention.

Detailed Description

Example 1:

fig. 1 to 7 show the embodiment 1. Referring to fig. 1 to 5, the remote-transmission electronic differential pressure liquid level meter of embodiment 1 includes a meter base 2 with a dial 1, a meter cover 3 engaged with the meter base, a liquid crystal display 4 mounted on the meter base, a circuit board 5, and a controller mounted on the circuit board. A stepping motor 6 fixed on the circuit board and a stepping motor driving instrument pointer 7 arranged on a rotating shaft of the stepping motor. The gauge stand is provided with a high pressure bin 8 and a low pressure bin 9. The pressure sensor 10 is installed in the low pressure chamber, the high and low pressure ends of the differential pressure sensor 11 are installed in the high pressure chamber and the low pressure chamber respectively, and the air inlet hole of the high pressure joint 12 installed on the gauge stand is communicated with the differential pressure sensor. An air inlet hole on a low-pressure joint 13 arranged on the gauge stand is respectively communicated with a differential pressure sensor and a pressure sensor. The controller is internally provided with a power supply control module, an MCU control module with an A/D converter, a differential pressure sensor module, a photoelectric isolation module, a 4-20mA signal output module, a 485 communication module, a liquid crystal display and a stepping motor driving instrument pointer, wherein the MCU control module is connected with the power supply control module, the differential pressure sensor module is respectively connected with the MCU control module through an amplification circuit module, the pressure sensor module is connected with the photoelectric isolation module, the 4-20mA signal output module is connected with the photoelectric isolation module, and the 485 communication module is respectively connected with the output end of the.

In this embodiment 1, there is a central control room which is respectively communicated with the 485 communication module 4-20mA signal output module through cables.

The pressure sensor and the differential pressure sensor are respectively model npc1210 and model CPS181 sensors. The power control module adopts a model 7805/7809 three-terminal voltage regulator. The MCU control module adopts a control module with the model of STC12C5A60S 2. The type of the amplifying circuit module is INA333 amplifying circuit module. The photoelectric isolation module adopts a HCNR200 photoelectric isolation module. The-20 mA signal output module adopts a signal output module with the model of XTR 115. The 485 communication module adopts a MAX485 communication module. The liquid crystal display adopts a 12864 liquid crystal screen.

Example 2:

fig. 1 to 6 and 8 show the embodiment 2. This example 2 is basically the same as example 1. The difference is that as shown in fig. 8, a wireless remote transmission DTU module which is connected with a 485 communication module and transmits monitoring data to a mobile phone or a computer is arranged in the remote transmission electronic differential pressure liquid level meter. The wireless remote transmission DTU module adopts a GPRS-DTU or 4G-DTU module. Parameters such as gas phase pressure, liquid level height, liquid volume and liquid phase and gas phase pressure difference in the storage tank displayed by the liquid level meter are sent to the mobile phone or the computer, so that the mobile phone or the computer far away from the gas storage tank can monitor changes of the parameters such as gas phase pressure, liquid level height, liquid volume and liquid phase and gas phase pressure difference in the storage tank in real time.

Claims

1. A remote-transmission electronic differential pressure liquid level meter is composed of meter base with dial, meter cover matched with meter base, LCD installed on meter base, circuit board, controller installed to circuit board, step motor fixed to circuit board, and pointer of step motor driven instrument installed to rotary shaft of step motor The pressure sensor module, the photoelectric isolation module connected with the amplification circuit module, the 4-20mA signal output module connected with the photoelectric isolation module, the 485 communication module respectively connected with the output end of the MCU control module, the liquid crystal display and the stepping motor drive instrument pointer.

2. The remote-transmission electronic differential pressure liquid level meter according to claim 1, characterized in that there is a central control room which is respectively communicated with the 485 communication module 4-20mA signal output module through cables.

3. The remote electronic differential pressure liquid level gauge according to claim 1, wherein there is a wireless remote DTU module connected to the 485 communication module for transmitting the monitoring data to a cell phone or a computer.

4. The remote-transmission electronic differential pressure liquid level meter according to any one of claims 1 to 3, wherein the pressure sensor and the differential pressure sensor are respectively npc1210 model and CPS181 model sensors, the power supply control module is 7805/7809 three-terminal regulator, the MCU control module is STC12C5A60S2 model control module, the amplifying circuit module is INA333 amplifying circuit module, the photoelectric isolation module is HCNR200 photoelectric isolation module, the 4-20mA signal output module is XTR115 signal output module, the 485 communication module is MAX485 communication module, and the liquid crystal display is 12864 liquid crystal display.

5. The remote-transmission electronic differential pressure liquid level meter according to one of claims 1 to 3, wherein the wireless remote-transmission DTU module is a GPRS-DTU or 4G-DTU module.