Integrated differential pressure flow metering device

Abstract

The utility model relates to the technical field of flow meters, in particular to an integrated differential pressure flow metering device which internally integrates a primary detection assembly, an electric signal conversion assembly, a flow calculation and compensation calculation assembly and a communication transmission assembly in an integrated mode. According to the integrated differential pressure flow metering device, a transmitter, an integrating instrument and a data uploading device which are required by traditional differential pressure flow metering are canceled and are all integrated together, equipment required in the implementation process is reduced, the integrated differential pressure flow metering device is convenient to install, the cost is low, and the integrated differential pressure flow metering device is suitable for large-scale popularization and application. And meanwhile, investment and maintenance manpower are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meters, in particular to an integrated differential pressure flow measurement device. Background Art

[0002] At present, there are generally two forms of differential pressure flow meters. One is a split type. The primary element connects the detected positive pressure and negative pressure to the differential pressure transmitter through pressure guiding pipes. The transmitter converts the pressure signal into a 4-20 mA analog signal, and then connects the analog signal to a flow integrator or PLC for flow calculation. At the same time, pressure and temperature detection devices are separately installed on the pipeline, and the pressure and temperature signals are connected to the integrator or PLC through the transmitter for flow compensation measurement. Finally, the data is uploaded through a data acquisition device. The other is an integrated type, where the differential pressure transmitter and the pressure transmitter are installed on the differential pressure detection element, and there is no need for pressure guiding pipes to introduce pressure. At the same time, the temperature detection is built into the primary detection element, and then the differential pressure, pressure, and temperature signals are connected to a flow integrator or PLC for flow calculation. Finally, the data is uploaded through a data acquisition device.

[0003] This method has the following problems:

[0004] 1. For traditional differential pressure flow meters, to achieve the final data upload, it is necessary to have detection elements, differential pressure transmitters, flow integrators or PLCs, data acquisition devices, etc. The required equipment is numerous, the investment is large, and the installation is troublesome.

[0005] 2. With the flow monitoring device, pressure and temperature detection devices, and flow calculation and transmission devices, traditional flow measurement solutions require a large number of equipment, have a large amount of daily maintenance, many fault points, and require a lot of resources and manpower. Content of the Utility Model

[0006] In view of this, the purpose of the present utility model is to provide an integrated differential pressure flow measurement device to solve the problems of a large number of required equipment and a large amount of maintenance in traditional flow measurement solutions.

[0007] Based on the above purpose, the present utility model provides an integrated differential pressure flow measurement device, which is integrally integrated with:

[0008] A primary detection component for detecting differential pressure, real-time gauge pressure, and real-time temperature;

[0009] An electrical signal conversion component, including a first conversion part and a second conversion part. The first conversion part is used to convert the physical quantities detected by the primary detection component into capacitance signals or resistance signals, and the second conversion part is used to convert the capacitance signals or resistance signals converted by the first conversion part into analog signals;

[0010] Flow calculation and compensation calculation component, including an analog-to-digital conversion unit and a flow calculation and compensation calculation unit. The analog-to-digital conversion unit is used to convert the analog signal converted by the second conversion unit into a digital signal and input it into the flow calculation and compensation calculation unit. The flow calculation and compensation calculation unit is used to perform flow calculation and flow compensation calculation, obtain the calculation result and output a serial port signal;

[0011] Communication transmission component, used to receive the serial port signal output by the flow calculation and compensation calculation unit and upload the data.

[0012] Preferably, the device is also integrally integrated with a data display unit, which is used to receive the serial port signal output by the flow calculation and compensation calculation unit and display the data.

[0013] Preferably, the primary detection component includes a differential pressure detection device for detecting differential pressure, a pressure detection device for detecting real-time gauge pressure, and a temperature detection device for detecting real-time temperature.

[0014] Preferably, the differential pressure detection device is an orifice plate type standard part device or an inserted dynamic pressure head type differential pressure flowmeter.

[0015] Preferably, the analog-to-digital conversion unit includes a KV-AD40V type conversion unit.

[0016] Preferably, the flow calculation and compensation calculation unit includes an ARM Cortex-A series chip.

[0017] Preferably, the communication transmission component includes a TCP / IP transmission module, a 4G / 5G communication module, and a wifi communication module.

[0018] Preferably, the 4G / 5G communication module includes an EC20 module and an FX03 module, and the wifi communication module uses an ESP8266 or ESP32 module.

[0019] Advantages of the present utility model:

[0020] 1. Integrate the primary elements of flow measurement, pressure measurement, and temperature measurement, as well as the corresponding transmitters or sensors, flow calculation units, and data transmission modules together to form an integrated differential pressure flow metering device. The present utility model plans to cancel the traditional differential pressure flow metering devices such as transmitters, integrators, and data upload devices, and integrate them all together, reducing the equipment required in the implementation process, facilitating installation, and at the same time reducing the investment and maintenance manpower;

[0021] 2. Cancel the transmitters, integrators, data acquisition devices, etc. No longer require a large number of devices, easy to install, small maintenance volume, with 4G / 5G network transmission function, and data upload no longer depends on wired network layout, making the application more convenient. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the composition of an integrated differential pressure flow measurement device according to an embodiment of the present invention. Specific embodiments

[0024] In order to make the purpose, technical solutions and advantages of the present invention clearer and more understandable, the following will further describe the present invention in detail with reference to specific embodiments.

[0025] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meaning understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0026] As Figure 1 shown, the embodiment of this specification provides an integrated differential pressure flow measurement device, which is integrally integrated with a primary detection component, an electrical signal conversion component, a flow calculation and compensation calculation component, and a communication transmission component inside, where:

[0027] The primary detection component includes a differential pressure detection device for detecting differential pressure, a pressure detection device for detecting real-time gauge pressure, and a temperature detection device for detecting real-time temperature. The differential pressure detection device and the pressure detection device are collectively referred to as the differential pressure and pressure detection part, which can be a standard device such as an orifice plate, or an inserted dynamic pressure head type differential pressure flowmeter such as a bar type or a Pitot type.

[0028] The electrical signal conversion component includes a first conversion part and a second conversion part. The first conversion part is used to convert the physical quantity detected by the primary detection component into a capacitance signal or a resistance signal, including a differential pressure and pressure conversion part and a temperature conversion part. The second conversion part is used to convert the capacitance signal or resistance signal converted by the first conversion part into a 4-20mA analog signal, realizing the output of the electrical signal.

[0029] The flow rate calculation and compensation calculation component includes an analog-to-digital conversion part and a flow rate calculation and compensation calculation unit. The analog-to-digital conversion part is used to convert the analog signal converted by the second conversion part into a digital signal and input it into the flow rate calculation and compensation calculation unit. The flow rate calculation and compensation calculation unit is used to perform flow rate calculation and flow rate compensation calculation, obtain the calculation result and output a serial port signal. Among them, the analog-to-digital conversion part adopts the KV-AD40V conversion unit to convert the 4-20mA analog signal into a digital signal and enter the flow rate calculation and compensation calculation unit. The main module CPU of the flow rate calculation and compensation calculation unit adopts an ARM Cortex-A series chip (but not limited to this), and the operating system is an embedded Linux system, which is responsible for flow rate calculation processing and data upload, automatically calculates the corresponding flow rate data based on the received metering detection signal, uploads the data, and outputs an RS485 signal. The flow rate metering and compensation calculation formula is as follows:

[0030]

[0031] Where: Q V Instantaneous volume flow rate (m3 / h); k flow coefficient; ΔP differential pressure value (Pa); ρ medium density (kg / m3)

[0032]

[0033] Where: Q 补后 Is the flow rate after temperature and pressure compensation (m3 / h); Q 补前 Is the flow rate before temperature and pressure compensation (m3 / h); p real gauge pressure is the fluid pressure dynamically and real-time measured (Pa); p actual design pressure is the design pressure (Pa); t real temperature is the flow rate temperature dynamically and real-time measured (K); t design temperature is the design temperature (K).

[0034] The communication transmission component is used to receive the serial port signal output by the flow rate calculation and compensation calculation unit and upload the data. One is wired network transmission, which is ordinary TCP / IP network transmission; the other is wireless communication transmission. This part is configured with 4G / 5G communication modules and wifi communication modules. The 4G / 5G module adopts the EC20 module and the FX03 module (but not limited to this), and the wifi communication module adopts the ESP8266 or ESP32 module (but not limited to this), realizing the upload of gateway data through wireless communication.

[0035] The device may further include a data display unit, which is configured to receive the serial port signal output by the flow rate calculation and compensation calculation unit and display the data. A liquid crystal module is adopted, and it can also be connected point by point to the primary detection component to display information such as the measured flow rate, fluid pressure, and fluid temperature.

[0036] Those of ordinary skill in the art should understand that the discussion of any above embodiment is only exemplary and is not intended to imply that the scope of the present invention is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity. Any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An integrated differential pressure flow metering device, characterized in that, The device is integrally integrated with the following components: A primary detection component for detecting differential pressure, real-time gauge pressure, and real-time temperature; An electrical signal conversion component, including a first conversion part and a second conversion part. The first conversion part is used to convert the physical quantities detected by the primary detection component into capacitance signals or resistance signals, and the second conversion part is used to convert the capacitance signals or resistance signals converted by the first conversion part into analog signals; A flow rate calculation and compensation calculation component, including an analog-to-digital conversion part and a flow rate calculation and compensation calculation unit. The analog-to-digital conversion part is used to convert the analog signals converted by the second conversion part into digital signals and input them into the flow rate calculation and compensation calculation unit. The flow rate calculation and compensation calculation unit is used to perform flow rate calculation and flow rate compensation calculation, obtain the calculation results, and output serial port signals; A communication transmission component for receiving the serial port signals output by the flow rate calculation and compensation calculation unit and uploading the data.

2. The integrated differential pressure flow metering device according to claim 1, wherein The device is also integrally integrated with a data display unit for receiving the serial port signals output by the flow rate calculation and compensation calculation unit and displaying the data.

3. The integrated differential pressure flow metering device according to claim 1, wherein, The primary detection component includes a differential pressure detection device for detecting differential pressure, a pressure detection device for detecting real-time gauge pressure, and a temperature detection device for detecting real-time temperature.

4. The integrated differential pressure flow metering device according to claim 3, characterized in that, The differential pressure detection device is an orifice plate type standard part device or an inserted dynamic pressure head type differential pressure flowmeter.

5. The integrated differential pressure flow metering device according to claim 1, wherein The analog-to-digital conversion part includes a KV-AD40V type conversion unit.

6. The integrated differential pressure flow metering device according to claim 1, wherein The flow rate calculation and compensation calculation unit includes an ARM Cortex-A series chip.

7. The integrated differential pressure flow metering device according to claim 1, wherein The communication transmission component includes a TCP / IP transmission module, a 4G / 5G communication module, and a wifi communication module.

8. The integrated differential pressure flow metering device according to claim 7, characterized in that, The 4G / 5G communication module includes an EC20 module and an FX03 module, and the wifi communication module uses an ESP8266 or ESP32 module.

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