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1702662999@qq.com
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Phone
18915186518
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Address
No. 99 Tongtai Avenue, Industrial Concentration Zone, Jinhu County, Jiangsu Province
Product Categories
Jiangsu Huayun Instrument Co., Ltd
Intelligent/integrated orifice flowmeter
NegotiableUpdate on 03/21
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Overview
1. The integrated intelligent orifice plate flowmeter combines throttling devices such as orifice plates or nozzles, three valve groups, differential pressure sensors, pressure sensors, temperature sensors, signal processing units, display units, communication units, etc. It is a wide range and multi-purpose flowmeter that can complete various online dynamic compensation operations. This flowmeter comes in two types: bus powered and battery powered. Measure the flow rates of various liquids, gases, and vapors, and provide users with the mass flow rate, working state flow rate, standard state flow rate, cumulative flow rate, pressure, and temperature parameters of the measured medium. This flowmeter is easy to install, requires minimal maintenance, and can save installation and construction time and costs. Product price: Price 360.00 yuan 550.00 yuan 48000.00 yuan Starting from 1 unit in bulk
Product Details
1. The integrated intelligent orifice plate flowmeter combines throttling devices such as orifice plates or nozzles, three valve groups, differential pressure sensors, pressure sensors, temperature sensors, signal processing units, display units, communication units, etc. It is a wide range and multi-purpose flowmeter that can complete various online dynamic compensation operations. This flowmeter comes in two types: bus powered and battery powered. Measure the flow rates of various liquids, gases, and vapors, and provide users with the mass flow rate, working state flow rate, standard state flow rate, cumulative flow rate, pressure, and temperature parameters of the measured medium. This flowmeter is easy to install, requires minimal maintenance, and can save installation and construction time and costs.
Product price:
| price | ¥ 360.00 yuan | ¥ 550.00 yuan | ¥ 48000.00 yuan |
| Starting from batch | ≥ 1 unit |
overview
The integrated orifice flowmeter is a high range ratio differential pressure flow device composed of a standard orifice plate and a multi parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter, and pressure transmitter), which can measure the flow of gas, steam, liquid, and natural gas. Integrated orifice flow meters are widely used in process control and measurement in fields such as petroleum, chemical, metallurgical, power, heating, and water supply.
scope of application
1. Nominal diameter: 15 mm ≤DN≤1200mm
2. Nominal pressure: PN≤10MPa
3. Productivity: - 50℃≤t≤550℃
4. Range ratio: 1:10, 1:15
5. Accuracy: Level 0.5, Level 1
Integrated orifice flow meters are commonly used for cleaning liquids, gases, and steam services. It can be used for all pipe sizes, but it is very cost-effective for measuring larger flow rates (diameters over 6). Integrated orifice plates have also been approved by many organizations for the storage of liquids and gases.
The current integrated orifice plate calculation is still different, although various institutions are adopting a universally accepted integrated orifice plate flow equation. The integrated orifice plate size program usually allows users to select the desired flow equation.
The integrated orifice flowmeter can be made of any material, but stainless steel is the most common. The thickness of the plate used (1/8-1/2 ") is a function of the size of a line, temperature, pressure, and pressure difference during the process. The traditional integrated orifice flowmeter is a thin circular plate (with labels for processing and data) inserted into the pipeline between the two flanges of the nozzle joint. This installation method is cost-effective, but it requires a process to shut down and the board to be removed for maintenance or inspection. On the contrary, an integrated orifice plate device allows for the removal of non pressure reducing lines and closure of flow through the holes. In such accessories, an integrated orifice plate, a circular plate without labels
The concentric integrated orifice flowmeter has a sharp (square edge) concentric hole, which provides an almost pure line contact between the plate and the fluid, with negligible frictional resistance at the boundary. The ratio of concentric integrated orifice plates with β (or diameter) ranges from 0.25 to 0.75*** High flow velocity and low static pressure occur downstream of the integrated orifice plate at a pipe diameter of approximately 0.35 to 0.85. This is called shrinking. Measuring the pressure difference near the integrated orifice plate can greatly reduce the influence of pipeline roughness, as friction has an impact on the fluid and pipe wall.
Flange faucets are mainly used in the United States, located 1 inch on the surface of the integrated orifice plate (Figure 2-3). They do not use upper and lower pipes with a diameter of 2 inches. Corner faucets dominate all sizes of pipes in Europe, and pipes below 2 inches are used in the United States (Figure 2-3). Compared to corner joints, relatively small gaps are a potential maintenance issue. The tapered faucet (this is a near radius tap, Figure 2-4) is located upstream of the pipe diameter from the plate and downstream at the tapered point. The change in this position (β ratio and Reynolds number) is from 0.35d to 0.8D.
The Contracta faucet provides a large pressure difference and most of the noise. In addition, if the board changes, it may require a change in the tap position. Additionally, in small pipelines, the contraction may lie on the flange. Therefore, taper taps are usually only used for pipe sizes exceeding six inches.
The radius tap is similar to a shrinking tap, except that the downstream tap is fixed on the integrated orifice plate 0.5d (Figure 2-3). The pipeline faucet is located on pipes with 2.5 and 8 diameters upstream of the pipe mouth (Figure 2-3). They detect * * * small pressure differences, and are greatly affected by the tap distance of the orifice, pipeline roughness, inconsistent dimensions, and measurement errors.
The SCLG series integrated orifice flowmeter is a high range ratio differential pressure flow device composed of a standard orifice plate and a multi parameter differential pressure transmitter (or differential pressure transmitter, temperature transmitter, and pressure transmitter). It can measure the flow of gas, steam, liquid, and natural gas, and is widely used in process control and measurement in the fields of petroleum, chemical, metallurgy, power, heating, water supply, etc.
The integrated orifice flowmeter consists of a standard orifice throttling element, a three valve group, a differential pressure transmitter, and a shut-off valve (high-temperature medium cooling plate or condenser). The integrated structure is easy for users to install.
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model |
Remarks |
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| SKLG | Throttle device (orifice flowmeter) | |||||||||
| code |
Two basic classifications based on their structural features |
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| K |
perforated plate |
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| P |
Nozzles, etc |
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code |
Nominal pressure (105Pa) |
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2.5 |
2.5 |
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10 |
10 |
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16 |
16 |
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25 |
25 |
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64 |
64 |
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100 |
100 |
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200 |
200 |
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code |
Caliber (mm) |
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| 15~1200 |
15～1200mm |
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code |
Subdivide according to its structural form |
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H |
Standard orifice plate (ring chamber) |
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Y |
Standard orifice plate (flange) |
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K |
Standard orifice plate (drilling) |
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I |
ISA 1932 nozzle |
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L |
Long diameter nozzle |
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W |
Wenqiu Li nozzle |
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G |
Classic Wenqiu Li Guan |
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S |
Double orifice plate |
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Q |
Circular perforated plate |
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Z |
conical entrance orifice plate |
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R |
1/4 round hole plate |
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P |
Eccentric orifice plate |
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N |
Integrated (concealed) orifice plate |
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X |
Wedge-shaped orifice plate |
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T |
Special throttling devices not listed above |
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code |
medium |
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1 |
liquid |
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2 |
gas |
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3 |
steam |
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4 |
High temperature liquid |
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code |
Compensation form |
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N |
Without pressure or temperature compensation |
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P |
With pressure compensation output |
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T |
Equipped with temperature compensation output |
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Q |
Equipped with pressure and temperature compensation output |
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code |
Differential pressure range of transmitter |
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0 |
Micro differential pressure range |
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1 |
Low differential pressure range |
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2 |
Medium differential pressure range |
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3 |
High differential pressure range |
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code |
Is there an on-site display |
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W |
Throttle device sensor |
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X |
Intelligent throttling device (flowmeter) |
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As a standard flow detection instrument, orifice plate/differential pressure flowmeter has mature technology, is familiar to users, and has a wide range of applications. Integrated intelligent differential pressure flowmeter is a new type of flowmeter developed on the basis of traditional orifice plate/differential pressure flowmeter (hereinafter referred to as flowmeter).
2. Introduction to integrated intelligent orifice flowmeter:
Compared with traditional differential pressure flow meters, this flow meter has the following characteristics: ① Integrated structure: The flow meter improves the differential pressure signal system by eliminating the long and easy to block pressure pipeline. The connection between the meter body and the pipeline adopts a card structure, which is easy to install. ② Multi parameter detection: Differential pressure, pressure, and temperature sensors are installed on the body of the flowmeter, which can measure differential pressure, pressure, and temperature signals online Dynamic compensation function: The flowmeter processes the measured differential pressure, pressure, and temperature signals, dynamically completes various compensation calculations in real time, improves measurement accuracy, and expands the range Diverse types: The throttling components of the flowmeter can be standard throttling components that comply with GB/T2624-2006 (standardized orifice plate, standard nozzle, standard Venturi tube), as well as non-standard throttling components (quarter circular orifice plate, circular orifice plate, wedge-shaped orifice plate, conical circular orifice plate, etc.); There are two types of flow meters: external bus power supply (24V DC) and internal battery power supply (3.6V DC). Users can choose to use it according to the on-site situation and the purpose of use Standardized communication function: The output signal of the bus powered flowmeter complies with the HA RT communication protocol and can output standard 4-20 mA DC signals and digital signals superimposed on 4-20 mA DC Strong intelligent functions: In addition to dynamic measurement and multi parameter automatic compensation, the flowmeter also has multiple functions such as self diagnosis, configuration, dynamic cycle display, communication, providing equipment management information, and power-off protection.
Compared with traditional differential pressure flow meters, this flow meter has the following characteristics: ① Integrated structure: The flow meter improves the differential pressure signal system by eliminating the long and easy to block pressure pipeline. The connection between the meter body and the pipeline adopts a card structure, which is easy to install. ② Multi parameter detection: Differential pressure, pressure, and temperature sensors are installed on the body of the flowmeter, which can measure differential pressure, pressure, and temperature signals online Dynamic compensation function: The flowmeter processes the measured differential pressure, pressure, and temperature signals, dynamically completes various compensation calculations in real time, improves measurement accuracy, and expands the range Diverse types: The throttling components of the flowmeter can be standard throttling components that comply with GB/T2624-2006 (standardized orifice plate, standard nozzle, standard Venturi tube), as well as non-standard throttling components (quarter circular orifice plate, circular orifice plate, wedge-shaped orifice plate, conical circular orifice plate, etc.); There are two types of flow meters: external bus power supply (24V DC) and internal battery power supply (3.6V DC). Users can choose to use it according to the on-site situation and the purpose of use Standardized communication function: The output signal of the bus powered flowmeter complies with the HA RT communication protocol and can output standard 4-20 mA DC signals and digital signals superimposed on 4-20 mA DC Strong intelligent functions: In addition to dynamic measurement and multi parameter automatic compensation, the flowmeter also has multiple functions such as self diagnosis, configuration, dynamic cycle display, communication, providing equipment management information, and power-off protection.
3. Main purpose and scope of application:
3.1. Main purpose:
① Flow measurement of various liquids, such as water and corrosive acid/alkali media that stainless steel can withstand Measurement of flow rates for various gases, such as air, nitrogen, oxygen, natural gas, coal gas, etc Measurement of saturated steam and superheated steam flow rate.
3.2 Scope of Application:
Applicable medium temperature: -10 ℃ to+500 ℃; Pressure of the tested medium: 6.3MPa; Applicable environmental conditions: Temperature: -25 ℃~+55 ℃; Humidity: ≤ 95%; Atmospheric pressure: 86k Pa -106k Pa.
3.3. Varieties and specifications:
There are two main types of flow meters: external power supply and internal power supply (battery). There are various specifications in these two categories, including different nominal diameters, nominal pressures, medium temperatures, and different types of throttling components.
3.4 Working principle and structural characteristics:
3.4.1 Working principle:
Install throttling devices (such as orifice plates, nozzles, etc.) in pipelines where fluid flows to change the flow cross-section. But when the fluid passes through the throttling element, as shown in Figure 1, the fluid contracts at the throttling element, accelerating the flow and reducing the static pressure, resulting in a static pressure difference before and after the throttling element. As the flow velocity of the fluid increases, the static pressure difference (referred to as pressure difference) also increases. By utilizing the relationship between pressure difference and flow velocity, the flow rate can be measured.
Under the condition of known parameters, the relationship between flow rate, pressure difference, and related parameters can be derived based on the principles of flow continuity (mass conservation principle) and Bernoulli equation (energy conservation principle).
After taking engineering units for the relevant parameters, equation (1) can be written in the form of equation (3):
In equations (2) and (3), Qm represents the mass flow rate of the fluid,
Kg/hQv - Volume flow rate of fluid working state m/nC - Coefficient of throttling element d - Diameter of opening (or throat) of throttling element under working conditions,
M m ε - the coefficient of expansion of the medium β - the diameter ratio ρ - the density △ p of the fluid working state - the pressure difference at a specific position before and after the throttling element,
Pa
The parameters of the formula are related to the pressure, temperature, composition, and physical properties of the measured fluid. Therefore, this flowmeter not only measures the pressure difference before and after the throttling element, but also measures the pressure and temperature of the fluid. By comprehensively calculating and compensating for the pressure difference △ p, temperature t1, and pressure p1, the measurement goal is achieved.
3.4.2 Structural Features:
The flowmeter adopts an integrated structure, with the body, throttle element (orifice plate), sensor, converter, and display coordinated to form a whole. As shown in Figure 2. The composition, functions, and brief description of each component are as follows:
① The meter body and throttle body are the main body of the flowmeter, which is connected to the pipeline through flanges and connecting bolts. The cylindrical inner cavity of the body is connected to the pipeline to form a fluid pathway. The throttle element (orifice plate) is installed in the cylindrical inner cavity of the body, and the upstream and downstream sections of the orifice plate are perpendicular to the direction of fluid flow. When the fluid flows, a differential pressure signal is generated upstream and downstream of the orifice plate. The differential pressure signal is led out through the pressure hole on the body and applied to the differential pressure sensor.
② The sensor flowmeter is equipped with differential pressure sensors, pressure sensors, and temperature sensors. The pressure sensor and temperature sensor are directly installed on the body to detect the pressure and temperature of the fluid. The differential pressure sensor is installed in the pressure chamber at the upper part of the flowmeter. The differential pressure signal is applied to both sides of the differential pressure sensor through the pressure tube and three valve group, and the differential pressure sensor converts the differential pressure signal into an electrical signal.
③ The main function of the pressure pipe and the three valve group pressure pipe is to transmit differential pressure signals. The pressure pipe of ordinary flow meters is straight, and the three valve group is located between the three valve group joint and the pressure chamber. Its function is to protect the differential pressure sensor from damage caused by unilateral static pressure and also facilitate the zero adjustment of the flow meter.
④ The main function of the condenser is to facilitate the filling of isolation liquid when the medium temperature is above 150 ℃ or when there is corrosive medium, in order to avoid direct action of high-temperature medium or corrosive fluid on the differential pressure sensor.
⑤ The converter is located at the top of the flowmeter and serves as the brain of the flowmeter. Its main function is to convert and process differential pressure, pressure, and temperature signals; Calculation of flow rate, compensation of flow characteristics and fluid characteristics; Implement intelligent functions of flow meters (configuration, self diagnosis, cycle display, communication);
The converter is equipped with wiring terminals, an intelligent circuit board with CPU as the core, and a liquid crystal display. The converter is divided into two parts: the front and back studio. There is a wiring terminal board installed in the back workshop, which provides power supply wiring terminals for flow meters and wiring for output signals. For internal (battery) powered flow meters, high-efficiency lithium batteries are installed in the back working room. In the front workshop of the converter, the LCD display is located at the front end, and the working parameters of the flowmeter can be read through the window glass. There are also three circuit boards (signal processing board, communication board, and LCD board) with flow meters installed in the front studio. The electrical schematic diagram of the flow meter is shown in Figure 3.
4. Specific implementation:
Integrated intelligent orifice flow meters are installed on the clean circulating water inlet main pipe and compressed air outlet main pipe in the power air compressor station to measure the standard state volume flow rate, cumulative amount, pressure, and temperature parameters of the medium, so that users can independently calculate production costs. Testing items: ① Detection of inlet flow rate of clean circulating water ② Detection of compressed air flow rate.
5. Conclusion:
The integrated intelligent orifice flowmeter throttling device generates differential pressure signals, which are detected by differential pressure, pressure, and temperature sensors, and then processed by conversion circuits and CPUs to dynamically compensate for various factors that affect measurement accuracy online, and measure the flow rate of the fluid accurately. It has the characteristics of easy installation, wide range, and comprehensive compensation function. This flowmeter is easy to install, requires minimal maintenance, and can save installation and construction time and costs.
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