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Open channel ultrasonic flowmeter

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Open channel ultrasonic flowmeter

JD-MZ /LMC/UF-98M Ultrasonic Open Channel FlowmeterBacher trough flowmeter

Ultrasonic probe+Bacher groove

Open channel flowmeter

characteristic:

1: Physical fully enclosed probe: The physical seamless fully enclosed probe has obvious advantages such as waterproof, rainproof, dustproof, and lightning protection, making it more suitable for use in harsh environments such as the wild

2: Full Chinese humanized LCD display: Full Chinese 12864 point LCD display, which can simultaneously display water level height, forward flow rate, cumulative flow rate, emission wave status, liquid level display chart, relay on status, ambient temperature, output current and other parameters on the display page. All information can be understood by looking at one page.

3: Flexible measurement mode: There are two measurement modes for liquid level and distance at all times, and the reference position can be flexibly set to make the flow more intuitive

4: Various measurement times correspond to different speeds: Fast, medium, and slow speeds can be selected according to different on-site environments, greatly improving the stability and accuracy of open channel flow meters.

5: Parameter locking function: After debugging the parameters, the keyboard can be locked to prevent others from arbitrarily adjusting the already set parameters.

6: Parameter settings are simpler: there is no need for the complex parameter settings of open channel flow meters in the past. Our software has achieved complete internal intelligence, with triangular weirs installed and used directly, rectangular weirs only requiring the selection of weir mouth width, and Bachel slots only requiring the setting of c and n values

The traffic display interface is as follows:

purpose

Used in conjunction with a measuring weir to measure the flow rate of water in an open channel. It is mainly used to measure the flow rate and irrigation channels of sewage treatment plants, enterprise liquid units' sewage discharge outlets, urban sewers, etc.

Due to the use of instruments in our companyultrasonicMeasure through the air using non-contact methods. Therefore, in the case of sticky and corrosive liquids, it has higher reliability than other forms of instruments.

1、 Principle:
JD-LMZ/LMC/UF-98M/Ultrasonic sewage open channel flowmeterIt is based on a specific shape of the flow channel, ensuring that the flow rate can be determined at a certain liquid level height; Using a Bacher groove as a specific flow channel results in high measurement accuracy and easy installation.
The commonly used measuring weirs and channels include right angled triangular weirs, rectangular weirs, and Bacher channels:

Introduction:
LMZ seriesUltrasonic Open Channel FlowmeterIt is a new type of flow meter used for measuring the discharge of sewage from enterprise self flowing pipes (channels), abbreviated as "sewage flowmeter". It is widely used for measuring sewage discharge in the petroleum, chemical, textile, and pharmaceutical industries. It is one of the necessary instruments for urban pollution prevention and environmental protection departments to monitor sewage discharge, and also an essential instrument for measuring agricultural irrigation water discharge in water conservancy departments.
This flowmeter adopts technologies such as hydraulic flow measurement, ultrasonic positioning, microcomputer processing, and digital display, and can be installed and automatically measured in harsh environments. It has high reliability and strong resistance to dryness. Easy installation and maintenance, easy to read.

Principle:
LMZOpen channel flowmeterIt is based on the specific shape of the Bacher measuring groove/weir plate measuring groove, ensuring a certain liquid level height and obtaining a certain flow rate. The Bacher groove/weir plate measuring groove is selected as the specific flow channel, with high measurement accuracy and easy installation. The sensor measures the liquid level height, and the instantaneous flow rate and cumulative flow rate values are processed by the 89C52 series single-chip machine. The flow rate can be expressed as follows:
Q=KHn
Q： Instantaneous flow rate (t/h) K: flow constant
H： Liquid level height n: n power value
The instantaneous traffic is accumulated and processed to obtain the cumulative traffic.

Application area:
due toOpen channel flowmeterThe characteristics of non pressure flow are widely used in sewage discharge outlets, suitable for measuring and controlling sewage in various enterprises such as chemical, metallurgical, environmental protection, and pharmaceutical industries.

Main technical parameters:
Range: 20t/h, 50t/h, 150t/h, 400t/h, 900t/h, 1500t/h, 3000t/h, 5000t/h, 8000t/h, 10000t/h
Accuracy: Level 1.0
Display instrument temperature: 0 ℃~50 ℃ Medium temperature: 0 ℃~+60 ℃
Sensor temperature: -30 ℃~+60 ℃ Pressure: Free flow
Flow channel form: Bachel groove/triangular weir plate/rectangular weir plate Protection level: IP65
Power supply: 220VAC 50HZ Front straight section: 1-3 meters
Display: Dual window, 8-bit LED cumulative flow and 4-digit LED instantaneous flow. Power consumption: ≤ 15W
Requirements for the size of the Bacher trough open channel:

Model number	Applicable channel (width x height) mm	Minimum flow rate (t/h)	Maximum flow rate (t/h)
LMZ—20	≥200×250	0.32	20
LMZ—50	≥250×300	0.65	50
LMZ—150	≥300×500	2.77	115
LMZ—400	≥400×650	5.40	400
LMZ—900	≥600×800	9.00	900
LMZ—1500	≥840×1000	12.6	1500
LMZ—3000	≥1200×1000	45.0	3000
LMZ—5000	≥1680×1100	108.0	5400
LMZ—8000	≥1920×1100	126.0	7200

Requirements for the size of triangular/rectangular weir plates in open channels:

Model specifications	Maximum flow rate (t/h)	Applicable channels (width x depth)	Maximum water level (mm)
LMZ-Y-50	50	≥400×350	277
LMZ-Y-80	80	≥500×470	390
LMZ-Y-150	150	≥600×570	484
LMZ-Y-250	250	≥800×650	540
LMZ-Y-500	500	≥800×650	510
LMZ-Y-800	800	≥800×850	655
LMZ-Y-1000	1000	≥1000×850	707

Common specifications of weir plateOpen channel flowmeterSize:

Model specifications	B	H	P	P1
LMZ-Y-50	480	400	160	-
LMZ-Y-80	580	460	160	-
LMZ-Y-150	680	520	240	-
LMZ-Y-250	880	600	280	-
LMZ-Y-500	880	680	-	250
LMZ-Y-800	880	880	-	300
LMZ-Y-1000	1080	880	-	350

Civil engineering installation:
Before installation, first check the terrain. The inlet must be higher than the outlet to ensure a water level difference and smooth outlet. This is a successful installation of the Bachel troughOpen channel flowmeterThe key.

Simulation diagram of Bacher measurement slot

Common model specificationsOpen channel flowmeterInstallation dimensions (unit: mm)

model	B	L	L1	L2	H
LMZ-20	300	650	1500	1000	250
LMZ-50	380	750	2000	1500	300
LMZ-150	450	900	2500	1800	500
LMZ-400	600	900	3000	2000	700

The most critical point for installing the Bacher groove is:
It is necessary to ensure that there is a water level difference downstream of the Bacher trough, the discharge is smooth, and there will be no water accumulation
Intelligent flow display device:
The intelligent flow display instrument is a new product developed by our factory. The CPU adopts AT89C52 microprocessor, which can display both cumulative flow and instantaneous flow simultaneously with the support of general software.

Main features:
(1) The instrument can display both cumulative flow and instantaneous flow simultaneously.
(2) Can output standard current signal of 4-20mADC
(3) Power off data protection function, data retention time of ten years.
(4) Capable of print output and timed printing function (optional)
(5) Pulse signal capable of outputting cumulative flow value (optional)

Main technical indicators:
(1) Input signal: current
(2) Power supply: 220VAC, 50HZ, power consumption ≤ 10W
(3) Environmental temperature: 0-50 ℃ Relative temperature: ≤ 85%
(4) Installation size: disc structure
(5) Instrument size: 160 × 80 × 130mm
Hole size: 152 × 76mm

Wiring:

The integrated Bacher slot has an RVV sheathed signal wire of 20 meters. If the distance is far, users can extend it themselves, and the distance is generally within 2000 meters. Otherwise, field connection tests should be conducted.

Ordering Notice:
When placing an order, users must make the correct selection based on specific measurement conditions and on-site conditions:

When placing an order, please specify:
1. The name of the tested medium.
2. Upper limit traffic and commonly used traffic.
3. The length, width, and depth dimensions of open channels.
4. The height difference between the inlet and outlet.
5. Output signal and type.
6. Other special requirements that need to be explained.

The LMC series of flow sensors adoptsUltrasonic sensor The LMZ series adoptsStatic pressure sensor

Fully sealed production, anti-corrosion and moisture-proof. It can be applied to measurements of various media and is also suitable for low-power measurements. The electronic probe is applicable to the environment with wind, water vapor, foam or vortex; Ultrasonic probes are suitable for use in harsh environments such as corrosive chemicals, suspended solids, and grease.

Integrated ultrasonic open channel flowmeter

Water level measurement range (m):	0～3.0m
Blind spot m:	0.3m
The overall measurement accuracy is ± F S.：	System error ± 3 ‰
Flow measurement range:	Depending on the maximum capacity of 999999m3/h for the weir/channel
Working temperature ℃:	－20℃～＋60℃
Minimum water level resolution mm:	±1mm
Signal output:	RS485，4～20mA， pulse output
Power supply:	DC24V /150mA ； AC220 /100mA
Protection level:	IP65

Range: 250t/h Ultrasonic Open Channel Flowmeter	Range: 30t/h triangular weirOpen channel flowmeter	Range: 150t/h Manhole triangular weirOpen channel flowmeter
advantage: 1. A large amount of sewage foam does not affect its normal measurement 2. Suitable for spacious channels 3. No debugging required	advantage: 1. Suitable for small traffic channels with limited space 2. Sewage foam does not affect its normal measurement 3. No debugging required	advantage: 1. Suitable for narrow space manhole cement pipelines 2. It does not damage the probe even when there is a large amount of rainwater and sewage 3. Cement pipes can be installed without water level difference

Basher groove: