Wide-range-ratio temperature-pressure-flow integrated device

Abstract

A temperature-pressure-flow integrated device with a large range ratio comprises a measuring pipeline, and pipeline connecting structures are fixed to the two ends of the measuring pipeline respectively. A throttling device is arranged on the inner side of the middle of the measuring pipeline and divides the inner side of the measuring pipeline into a high-pressure side and a low-pressure side. A high-pressure side pipeline and a low-pressure side pipeline of the differential pressure transmitter are respectively communicated with the high-pressure side and the low-pressure side of the measuring pipeline; a high-pressure side main pipeline and a low-pressure side main pipeline are respectively communicated with the outer walls of the front side and the rear side of the throttling device, the high-pressure side pipelines of the plurality of differential pressure transmitters are communicated with the high-pressure side main pipeline after being connected in parallel, and the low-pressure side pipelines of the plurality of differential pressure transmitters are communicated with the low-pressure side main pipeline after being connected in parallel. According to the utility model, through the differential pressure transmitters arranged in parallel, the measuring range ratio of the flow measuring device is enlarged; the problem of the lower limit of the measuring range of the throttling device is fully solved.

Description

Technical Field

[0001] The utility model relates to the technical field of flow measurement of gas, liquid and steam in pipelines, and mainly relates to a temperature-pressure-flow integrated device with a large range ratio. Background Art

[0002] The differential pressure flow meter (also called throttling type) is based on the throttling principle of fluid flow, and uses the pressure difference generated when the fluid flows through the throttling device to achieve flow measurement. It is one of the most mature and commonly used methods for measuring flow in production. It is usually composed of a throttling device that can convert the measured flow into a pressure difference signal, a differential pressure gauge that can convert the pressure difference into a corresponding flow value for display, and a display instrument. In the unit combination instrument, the pressure difference signal generated by the throttling device is often converted into a corresponding standard signal (electrical or pneumatic) through a differential pressure transmitter for display, recording or control.

[0003] There are many types of differential pressure flowmeters on the market. Commonly used differential pressure flowmeters include: Bitopa flowmeter, orifice flowmeter, V-cone flowmeter, Annubar flowmeter, Vidibar flowmeter, Diamondbar flowmeter, Deltabar flowmeter, multi-hole balance flowmeter, etc. However, the general range ratio of flow measurement devices on the market is 1:10, which greatly limits the range of flow measurement. Utility Model Content

[0004] In view of the technical problem of the small flow measurement range of the above-mentioned flow measuring device, the present technical solution provides a temperature-pressure-flow integrated device with a large range ratio, which expands the range ratio by connecting multiple differential pressure transmitters in parallel, and can effectively solve the above-mentioned problem.

[0005] The utility model is realized by the following technical solutions:

[0006] A temperature-pressure-flow integrated device with a large range ratio comprises a measuring pipeline, and pipeline connection structures are respectively fixed at both ends of the measuring pipeline; a throttling device is arranged on the inner side of the middle part of the measuring pipeline to divide the inner side of the measuring pipeline into a high-pressure side and a low-pressure side; the high-pressure side pipeline and the low-pressure side pipeline of the differential pressure transmitter are respectively connected to the high-pressure side and the low-pressure side of the measuring pipeline; the outer walls on the front and rear sides of the throttling device are respectively connected to the high-pressure side main pipeline and the low-pressure side main pipeline, and the differential pressure transmitter is provided with a plurality of them, and the high-pressure side pipelines of the plurality of differential pressure transmitters are connected in parallel to be connected to the high-pressure side main pipeline, and the low-pressure side pipelines of the plurality of differential pressure transmitters are connected in parallel to be connected to the low-pressure side main pipeline.

[0007] Furthermore, a valve one is provided on the high-pressure side main pipeline and the low-pressure side main pipeline, and a plurality of differential pressure transmitters and valve one are respectively connected to the flow totalizing device signal through signal lines.

[0008] Furthermore, a pressure transmitter is connected to the measuring pipeline through a pipeline on the high-pressure side of the measuring pipeline, and a valve 2 is arranged between the pressure transmitter and the measuring pipeline. The valve 2 is connected to the flow integrator signal through a signal line.

[0009] Furthermore, a temperature sensor is provided on the low-pressure side of the measuring pipeline, and the temperature sensor is connected to the flow totalizing device through a signal line.

[0010] Furthermore, when the temperature sensor is a thermal resistor, three copper wires with the same specification and a resistance value less than 10Ω are used to effectively avoid measurement errors.

[0011] Furthermore, the flow totalizer adopts an ARM Cortex-M3 32-bit RISC core processor and is connected to a 128*64 dot matrix monochrome LCD display; when the temperature and pressure signals are abnormal, emergency parameter values ​​are used for compensation calculations. Based on the ARM microprocessor, it cooperates with various flow transmitters and sensors to accurately measure and calculate the flow rate for different fluid media through a variety of flow mathematical models. It can collect, display, control, remotely transmit, communicate and process various signals such as on-site temperature, pressure, flow, etc., forming a digital acquisition system and control monitoring system, which is widely used in trade settlement and factory metering management networks in industries such as petrochemicals, chemicals, metallurgy, electricity, light industry, medicine and urban gas.

[0012] Furthermore, the input functions of the flow totalizer include flow channel, temperature channel and pressure channel; the signals input into the flow channel include analog signals and frequency signals, wherein the analog signals are 4-20mA and 0-10mA signals, the frequency signal is Fr, the range is 0.0-5000.0HZ, the low level is ≤1V, the high level is ≥5V; the signals input into the temperature channel include: 0-10mA, 4-20mA, Pt100 signals; the signals input into the pressure channel include: 0-10mA and 4-20mA signals.

[0013] Furthermore, the output functions of the flow totalizer include power distribution output, transmission output and relay output. The power distribution output provides a 12VDC power supply for a temperature sensor F12 and a 24VDC sensor power supply for two differential pressure transmitters Q24 and P24; the single-channel maximum output current is 30mA, of which the flow current 24V distribution Q24 and the pressure 24V distribution P24 share a common ground; the transmission output supports 1 standard current transmission output with a maximum load capacity of 500Ω; the relay output supports a maximum of 3 relay outputs with a contact capacity of 3A@250VAC / 3A@30VDC, and can be configured with upper-limit, upper-limit, lower-limit and lower-limit alarms.

[0014] Furthermore, the differential pressure transmitter adopts a single crystal silicon resonant sensor to convert the measured differential pressure into a 4-20mADC current signal output, which is suitable for measuring the flow, liquid level, density and pressure of liquid, gas or steam. The differential pressure transmitter can measure, display or remotely monitor static pressure, and has functions such as fast response, remote setting and self-diagnosis.

[0015] Furthermore, the differential pressure transmitter is provided with a display screen, which can measure, display or remotely monitor the static pressure. Beneficial Effects

[0016] The utility model proposes a temperature-pressure-flow integrated device with a large range ratio, which has the following beneficial effects compared with the prior art:

[0017] The utility model expands the range ratio by connecting multiple differential pressure transmitters in parallel; for example, if two differential pressure transmitters with a range ratio of 1:10 are connected in parallel, the two differential pressure transmitters after parallel connection can expand the range ratio to 1:100; the principle is: two differential pressure transmitters are installed on a throttling device, of which the first differential pressure transmitter can achieve a range ratio of 1:10, and the second differential pressure transmitter further reduces the flow range from the lower limit to 1:10 on the basis of the first differential pressure transmitter; then the range ratio is equivalent to 1:10X10=1:100. If the range ratio needs to be further expanded, multiple differential pressure transmitters can be connected in parallel according to the needs, which fully solves the problem of the lower limit of the range of the throttling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is a structural schematic diagram of the flow totalizing device in the utility model.

[0020] The numbers in the accompanying drawings are: 1-measuring pipeline, 2-pipeline connection structure, 3-throttling device, 4-high-pressure side main pipeline, 5-low-pressure side main pipeline, 6-valve one, 7-differential pressure transmitter, 71-high-pressure side pipeline, 72-low-pressure side pipeline, 8-pressure transmitter, 9-valve two, 10-temperature sensor, 11-flow integrating device, 111-liquid crystal display, 112-USB interface. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. The described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Under the premise of not departing from the design concept of the utility model, various modifications and improvements made by ordinary people in this field to the technical solutions of the utility model should fall within the protection scope of the utility model. Example

[0022] like Figure 1 As shown, a temperature-pressure-flow integrated device with a large range ratio includes a measuring pipeline 1, which is a hollow cylindrical pipeline; pipeline connection structures 2 are fixed at both ends of the measuring pipeline 1. In this embodiment, the pipeline connection structure 2 is a flange.

[0023] A throttling device 3 is arranged on the inner side of the middle part of the measuring pipeline 1, and the throttling device 3 divides the inner side of the measuring pipeline 1 into a high-pressure side and a low-pressure side; the high-pressure side pipeline 71 and the low-pressure side pipeline 72 of the differential pressure transmitter 7 are connected to the high-pressure side and the low-pressure side of the measuring pipeline 1 respectively.

[0024] The outer walls at the front and rear sides of the throttling device 3 (i.e., the high-pressure side and the low-pressure side in the pipeline) are respectively connected with a high-pressure side main pipeline 4 and a low-pressure side main pipeline 5. Valves 1 6 are provided on the high-pressure side main pipeline 4 and the low-pressure side main pipeline 5. The two valves 1 6 are respectively connected to the flow totalizing device 11 through signal lines.

[0025] A plurality of differential pressure transmitters 7 are provided, and the high-pressure side pipelines 71 of the plurality of differential pressure transmitters 7 are connected in parallel and communicated with the high-pressure side main pipeline 4, and the low-pressure side pipelines 72 of the plurality of differential pressure transmitters 7 are connected in parallel and communicated with the low-pressure side main pipeline 5. The plurality of differential pressure transmitters 7 are respectively connected to the flow totalizer through signal lines.

[0026] In this embodiment, the high-pressure side pipelines 71 of the two differential pressure transmitters 7 are connected in parallel and communicated with the high-pressure side main pipeline 4, and the low-pressure side pipelines 72 of the two differential pressure transmitters 7 are connected in parallel and communicated with the low-pressure side main pipeline 5.

[0027] Located on the high-pressure side of the measuring pipeline 1, a pressure transmitter 8 is connected through the pipeline. A valve 2 9 is provided between the pressure transmitter 8 and the measuring pipeline 1. The valve 2 9 is connected to the flow totalizer signal through a signal line.

[0028] A temperature sensor 10 is provided on the low-pressure side of the measuring pipeline 1, and the temperature sensor 10 is connected to the flow totalizer 11 through a signal line. When the temperature sensor 10 is a thermal resistor, three copper wires with the same specification and a resistance value less than 10Ω are used to effectively avoid measurement errors.

[0029] The flow totalizer 11 adopts an ARM Cortex-M3 32-bit RISC core processor and is connected to a 128*64 dot matrix monochrome LCD 111; when the temperature and pressure signals are abnormal, emergency parameter values ​​are used for compensation calculations. The input functions of the flow totalizer 11 include flow channel, temperature channel and pressure channel; the signals input into the flow channel include analog signals and frequency signals, wherein the analog signals are 4-20mA and 0-10mA signals, and the frequency signal is Fr, with a range of 0.0-5000.0HZ, low level ≤1V, and high level ≥5V; the signals input into the temperature channel include: 0-10mA, 4-20mA, and Pt100 signals; the signals input into the pressure channel include: 0-10mA and 4-20mA signals. The output functions of the flow totalizer 11 include power distribution output, transmission output and relay output. The power distribution output provides a 12VDC power supply for a temperature sensor F12 and a 24VDC sensor power supply for two differential pressure transmitters Q24 and P24; the single-channel maximum output current is 30mA, of which the flow current 24V distribution Q24 and the pressure 24V distribution P24 share a common ground; the transmission output supports 1 standard current transmission output with a maximum load capacity of 500Ω; the relay output supports a maximum of 3 relay outputs with a contact capacity of 3A@250VAC / 3A@30VDC, and can be configured with upper upper limit, upper limit, lower limit, and lower lower limit alarms.

[0030] In this embodiment, the flow totalizing device 11 uses a sophisticated flow totalizing instrument of model MF30X01K19A produced by Hongguang Instrument Factory of the Group.

[0031] The differential pressure transmitter 7 uses a single crystal silicon resonant sensor to convert the measured differential pressure into a 4-20mADC current signal output, which is suitable for measuring the flow, liquid level, density and pressure of liquid, gas or steam. The differential pressure transmitter is also equipped with a display screen, which can measure, display or remotely monitor static pressure.

[0032] In this embodiment, the differential pressure transmitter 7 adopts the differential pressure transmitter model EJA110E produced by Zhonghongguang Instrument Factory of the Group. The EJA110E high-performance differential pressure transmitter adopts single crystal silicon resonant sensor technology and is suitable for measuring the flow rate, liquid level density and pressure of liquid, gas or steam. EJA110E converts the measured differential pressure into a 4-20mA.DC current signal output. It can measure, display or remotely monitor static pressure and has functions such as fast response, remote setting and self-diagnosis.

[0033] The above implementation is only for illustrating the technical concept and features of the utility model, and its purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and it cannot be used to limit the protection scope of the utility model. Any equivalent transformation or modification made according to the spirit of the utility model should be included in the utility model.

Claims

1. A temperature-pressure-flow integrated device with a large range ratio, comprising a measuring pipeline (1), wherein both ends of the measuring pipeline (1) are respectively fixed with pipeline connection structures (2); a throttling device (3) is arranged on the inner side of the middle part of the measuring pipeline (1), and the inner side of the measuring pipeline (1) is divided into a high-pressure side and a low-pressure side; a high-pressure side pipeline (71) and a low-pressure side pipeline (72) of a differential pressure transmitter (7) are respectively connected to the high-pressure side and the low-pressure side of the measuring pipeline (1); and the characteristics are: The outer walls on the front and rear sides of the throttling device (3) are respectively connected to a high-pressure side main pipeline (4) and a low-pressure side main pipeline (5). A plurality of differential pressure transmitters (7) are provided. The high-pressure side pipelines (71) of the plurality of differential pressure transmitters (7) are connected in parallel and connected to the high-pressure side main pipeline (4). The low-pressure side pipelines (72) of the plurality of differential pressure transmitters (7) are connected in parallel and connected to the low-pressure side main pipeline (5).

2. A temperature-pressure-flow integrated device with a large range ratio according to claim 1, characterized in that: The high-pressure side main pipeline (4) and the low-pressure side main pipeline (5) are provided with valve one (6), and a plurality of differential pressure transmitters (7) and valve one (6) are respectively connected to the flow totalizing device (11) through signal lines.

3. The temperature-pressure-flow integrated device with a large range ratio according to claim 1, characterized in that: Located on the high-pressure side of the measuring pipeline (1), a pressure transmitter (8) is connected via the pipeline. A second valve (9) is provided between the pressure transmitter (8) and the measuring pipeline. The second valve (9) is connected to the flow totalizing device (11) via a signal line.

4. The temperature-pressure-flow integrated device with a large range ratio according to claim 1, characterized in that: A temperature sensor (10) is provided on the low-pressure side of the measuring pipeline (1), and the temperature sensor (10) is connected to a flow totalizing device (11) via a signal line.

5. The temperature-pressure-flow integrated device with a large range ratio according to claim 4, characterized in that: When the temperature sensor (10) is a thermal resistor, the signal line uses three copper wires with the same specification and a resistance value less than 10Ω.

6. A temperature-pressure-flow integrated device with a large range ratio according to any one of claims 2 to 5, characterized in that: The flow totalizing device (11) adopts an ARM Cortex-M3 32-bit RISC core processor and is connected to a 128*64 dot matrix monochrome liquid crystal display (111); when the temperature and pressure signals are abnormal, emergency parameter values ​​are used to perform compensation operations.

7. A temperature-pressure-flow integrated device with a large range ratio according to claim 6, characterized in that: The input function of the flow totalizer (11) includes a flow channel, a temperature channel and a pressure channel; the signal input to the flow channel includes an analog signal and a frequency signal, wherein the analog signal is a 4-20mA or 0-10mA signal, and the frequency signal is Fr, with a range of 0.0-5000.0HZ, a low level ≤1V, and a high level ≥5V; The signals input to the temperature channel include: 0-10mA, 4-20mA, and Pt100 signals; the signals input to the pressure channel include: 0-10mA and 4-20mA signals.

8. The temperature-pressure-flow integrated device with a large range ratio according to claim 6, characterized in that: The output functions of the flow totalizing device (11) include power distribution output, transmission output and relay output. The power distribution output provides a 12VDC power supply for a temperature sensor F12 and a 24VDC sensor power supply for two differential pressure transmitters Q24 and P24. The maximum output current is 30mA per channel. The transmission output supports one standard current transmission output with a maximum load capacity of 500Ω. The relay output supports a maximum of three relay outputs with a contact capacity of 3A@250VAC / 3A@30VDC. The alarm can be configured as an upper limit, upper limit, lower limit and lower lower limit.

9. The temperature-pressure-flow integrated device with a large range ratio according to claim 1, characterized in that: The differential pressure transmitter (7) adopts a single crystal silicon resonant sensor to convert the measured differential pressure into a 4-20mADC current signal output.

10. The temperature-pressure-flow integrated device with a large range ratio according to claim 1, characterized in that: The differential pressure transmitter (7) is provided with a display screen and can measure, display or remotely monitor the static pressure.

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