CN215261897U

CN215261897U - Online high accuracy steam flow metering device

Info

Publication number: CN215261897U
Application number: CN202121492567.7U
Authority: CN
Inventors: 林瑞忠; 赵太甲
Original assignee: Fuzhou Charm Faith Autosystem Co ltd
Current assignee: Fuzhou Charm Faith Autosystem Co ltd
Priority date: 2021-07-02
Filing date: 2021-07-02
Publication date: 2021-12-21
Anticipated expiration: 2031-07-02

Abstract

The utility model relates to an online high accuracy steam flow metering device. The device comprises a steam flowmeter, a power supply module and a sensor module, wherein the power supply module is connected with the steam flowmeter and used for supplying power to the whole device; the steam flow meter comprises an MCU, a touch screen connected with the MCU, an A/D module used for transmitting signals collected by the sensor module to the MCU, a communication module used for realizing online communication of the steam flow meter, and a DC/DC conversion module. The sensor module comprises a pressure transmitter for acquiring outside pressure, a differential pressure transmitter for acquiring outside differential pressure and a temperature transmitter for acquiring outside temperature. The utility model discloses the device can greatly reduced investment, operating cost, improves work efficiency.

Description

Online high accuracy steam flow metering device

Technical Field

The utility model relates to an online high accuracy steam flow metering device.

Background

In industrial production, the metering of steam has direct reference value on the aspects of accounting and management of production cost, optimization of operation decision and the like. The research on the technology of improving the metering precision of the steam flow and the like is urgently needed by the current industrial production.

The traditional industrial steam flow measurement is mainly characterized in that a sensor acquires signals, and a computer measures the signals and converts the signals into average production throughout the day. Due to the low precision and large error of the sensor (the measuring precision is 0.2-0.5%, the measuring error is increased due to the large fluctuation range of the medium in the pipeline), the method has the defects of complex production flow, high manufacturing cost and low measuring precision. In order to solve the problem, an online high-precision flowmeter is required to be used for metering steam, and the online high-precision flowmeter can compensate and meter media in real time, so that the flow rate of the media can be obtained in time.

Disclosure of Invention

An object of the utility model is to provide an online high accuracy steam flow metering device, can greatly reduced investment, operating cost, improve work efficiency.

In order to achieve the above purpose, the technical scheme of the utility model is that: an online high-precision steam flow metering device comprises a steam flowmeter, a power supply module and a sensor module, wherein the power supply module is connected with the steam flowmeter and used for supplying power to the whole device; the steam flow meter comprises an MCU, a touch screen connected with the MCU, an A/D module used for transmitting signals collected by the sensor module to the MCU, a communication module used for realizing online communication of the steam flow meter, and a DC/DC conversion module.

The utility model discloses an embodiment, sensor module is including the pressure transmitter who is used for gathering ambient pressure, the temperature transmitter who is used for gathering ambient temperature including the differential pressure transmitter who is used for gathering ambient pressure difference and is used for gathering ambient temperature.

The utility model discloses an embodiment, steam flowmeter still includes USB module, storage module, button module, DA output module be connected with MCU.

In an embodiment of the present invention, the MCU employs an ARM-a72 processor or BCM2837B 0.

In an embodiment of the present invention, the a/D module adopts a 22-bit a/D acquisition chip.

The utility model discloses an embodiment, communication module adopts serial ports communication chip.

In an embodiment of the present invention, the touch screen is a 7-inch touch screen.

In an embodiment of the present invention, the D/a output module adopts a 10-bit D/a output chip.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model can greatly reduce the investment and the operation cost, improve the working efficiency, and greatly reduce the occupied area and the weight of the metering facility on the platform and the formed pressure loss; the online real-time compensation flowmeter can simplify equipment investment and save considerable investment, and in addition, the online real-time compensation flowmeter can reliably run for a long time without maintenance, so the online real-time compensation flowmeter is particularly suitable for a platform.

Drawings

Fig. 1 is an overall block diagram of the present invention.

Fig. 2 is a schematic diagram of the online flowmeter of the present invention.

Figure 3 is the AC/DC power supply of the present invention.

Fig. 4 is a schematic circuit diagram of the D/a output module of the present invention.

Fig. 5 is the schematic diagram of the a/D module of the present invention.

Fig. 6 is a functional schematic diagram of the MCU processor chip of the present invention.

Fig. 7 is a schematic circuit diagram of the communication module of the present invention.

Fig. 8 is a schematic circuit diagram of the USB module of the present invention.

Detailed Description

The technical solution of the present invention will be specifically described below with reference to the accompanying drawings.

As shown in fig. 1-2, the utility model relates to an online high-precision steam flow metering device, which comprises a steam flow meter, a power module (shown in fig. 3) connected with the steam flow meter and used for supplying power to the whole device, and a sensor module used for collecting external signals; the steam flow meter comprises an MCU (microprogrammed control unit), a touch screen connected with the MCU, an A/D (analog/digital) module used for transmitting signals collected by a sensor module to the MCU, a communication module used for realizing online communication of the steam flow meter and a DC/DC (direct current/direct current) conversion module (such as K7805, 2412-1WR2 and B0505-1WR 2). The sensor module comprises a pressure transmitter for acquiring outside pressure, a differential pressure transmitter for acquiring outside differential pressure and a temperature transmitter for acquiring outside temperature. The steam flow meter also comprises a USB module (as shown in figure 8, adopting a chip such as SL 811), a storage module (adopting a FLASH storage chip such as KLMBG2 JETD), a key module and a D/A output module, wherein the USB module is connected with the MCU.

The MCU adopts an ARM-A72 processor or a BCM2837B0, and as shown in FIG. 6, the functional schematic diagram of the BCM2837B0 processor chip is shown.

In this embodiment, the a/D module employs a 22-bit a/D acquisition chip (e.g., ADS 1213), and fig. 5 is a schematic diagram of the a/D module acquisition.

In this embodiment, the communication module uses a serial communication core (such as MAX202, ISO 3082) chip, and fig. 7 is a schematic circuit diagram of the communication module.

In this embodiment, the touch screen is a 7-inch touch screen, for example, a 7-inch 1024 × 600IPS low-function version is adopted.

In this embodiment, the D/a output module adopts a 10-bit D/a output chip (such as a MAX5615 chip), and fig. 4 is a schematic diagram of a circuit of the D/a output module.

As shown in FIG. 1, the online high-precision steam flow meter of the present invention mainly comprises a body (circuit board, LCD display, button, touch screen), a pressure transmitter, a differential pressure transmitter, and a temperature transmitter,

the device adopts the integrated structure design of the board card, has compact structure, small volume and easy maintenance, and is convenient for field installation and use;

converting analog quantities such as pressure, differential pressure and temperature in a pipeline into millivolt electric signals by adopting a high-precision 22-bit A/D chip, and calculating the steam quantity in a medium according to parameters such as temperature, pressure and differential pressure of the medium so as to measure the medium;

the existing IF97 standard is adopted during software metering, the area where the current steam is located (4 areas are mainly used in the industry at present) is judged in real time, and the water and steam saturation boundary is judged, so that accurate calculation is realized.

Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.

Claims

1. An online high-precision steam flow metering device is characterized by comprising a steam flow meter, a power supply module and a sensor module, wherein the power supply module is connected with the steam flow meter and used for supplying power to the whole device; the steam flow meter comprises an MCU, a touch screen connected with the MCU, an A/D module used for transmitting signals collected by the sensor module to the MCU, a communication module used for realizing online communication of the steam flow meter, and a DC/DC conversion module.

2. The on-line high-precision steam flow metering device of claim 1, wherein the sensor module comprises a pressure transmitter for acquiring an ambient pressure, a differential pressure transmitter for acquiring an ambient differential pressure and a temperature transmitter for acquiring an ambient temperature.

3. The online high-precision steam flow metering device of claim 1, wherein the steam flow meter further comprises a USB module, a storage module, a button module and a D/A output module which are connected with the MCU.

4. The on-line high-precision steam flow metering device of claim 1, wherein the MCU adopts an ARM-A72 processor or a BCM2837B 0.

5. An online high-precision steam flow metering device according to claim 1, characterized in that the A/D module adopts a 22-bit A/D acquisition chip.

6. The on-line high-precision steam flow metering device of claim 1, wherein the communication module adopts a serial communication chip.

7. The on-line high-precision steam flow metering device of claim 1, wherein the touch screen is a 7-inch touch screen.

8. An online high-precision steam flow metering device according to claim 3, characterized in that the D/A output module adopts a 10-bit D/A output chip.