CN203561397U - A Small Caliber Gas Ultrasonic Flowmeter - Google Patents

Abstract

The utility model relates to a small-diameter gas ultrasonic flowmeter, which comprises a flowmeter body and a flowmeter meter head. A temperature sensor and an ultrasonic sensor probe are arranged in the cavity of the flowmeter body, and pipe connecting threads are respectively arranged at both ends of the flowmeter body. , used for threaded connection with pipelines, no need for electric welding installation, convenient and quick installation and disassembly; flow direction signs are provided on the barrel of the flowmeter body to indicate the gas flow direction, avoid installation errors, and further improve the convenience of flowmeter installation The body of the flowmeter is made of aluminum alloy, which is light in weight, easy to carry, and reduces transportation costs.

Description

A Small Caliber Gas Ultrasonic Flowmeter

technical field

The utility model relates to an ultrasonic flowmeter, which is suitable for the detection of low flow rate, especially suitable for the detection of gas with a working condition flow rate of 0.7-65m ³ /h and a starting flow rate of 0.08-0.16m ³ /h. The utility model relates to a DN25-DN32 small-caliber gas ultrasonic flowmeter, which belongs to the technical field of industrial instrumentation.

Background technique

Ultrasonic flowmeter is a flowmeter that is installed on the flowing gas pipeline and uses ultrasonic principle to measure the gas flow.

Ultrasonic gas flow detection technology is a bright spot in the field of flow detection in recent years. With the rapid development of ultrasonic flowmeter technology, a large number of ultrasonic flowmeters are widely used in industrial production, energy measurement, transportation, hotel catering, residential life and other industries. Applications. Judging from the application of large and medium-caliber gas ultrasonic flowmeters, ultrasonic flowmeters have their own unique advantages in measurement accuracy, reliability, pressure loss, maintenance costs and manufacturing costs compared to other types of flowmeters. Especially in the field of natural gas pipeline transportation, gas ultrasonic flowmeter has become the trend of the best choice.

However, in the actual application of natural gas pipeline field, the detection of low flow rate is a problem that cannot be ignored, and has been paid more and more attention. Today, with the popularization and use of natural gas, more and more flowmeters are installed in pipelines. As a tool for trade settlement, the choice of flowmeters in actual pipeline installations is basically large and medium-sized flowmeters. , the flowmeter is more accurate in the case of medium and large flow rates. The user's gas flow rate in the production process is unstable, and the flow rate of some users is extremely low. Use a large-caliber flowmeter to measure low flow rates. The measurement error increases, and the gas supplier brings economic losses.

At present, the commonly used medium and low pressure small-caliber gas flowmeters at home and abroad are mainly distributed in DN25 to DN80, including turbine flowmeters, positive displacement flowmeters, throttling flowmeters, ultrasonic flowmeters, electromagnetic induction flowmeters, mass flowmeters, Roots flowmeter, etc., due to the standard short-cut structure of this type of gas flowmeter, the accuracy level of this type of gas flowmeter for gas flow measurement is mostly below 1.0, the measurement range is small, and the range ratio is small. 5:1 to 20:1, and it is impossible to measure the flow of gas in the state of small flow rate. In addition, affected by the flow field, this type of gas flowmeter needs to install straight pipe sections of different lengths in structure to improve the measurement accuracy of gas flow and increase the range ratio, otherwise it cannot be detected, and the installation of straight pipe sections This makes the small-caliber gas flowmeter subject to certain restrictions on the detection and installation requirements.

Utility model content

The technical problem to be solved by the utility model is to provide a small-caliber gas ultrasonic flowmeter for the above deficiencies, which solves the problem of large detection errors of low-flow gas. The advantages of accuracy, simple structure and convenient installation.

In order to solve the above technical problems, the utility model adopts the following technical solutions: a small-caliber gas ultrasonic flowmeter, including a flowmeter body and a flowmeter head, and a temperature sensor and an ultrasonic sensor probe are arranged in the cavity of the flowmeter body. In that: the two ends of the flowmeter body are respectively provided with pipe connecting threads.

In an optimized solution, a meter connection seat is communicated between the flowmeter body and the flowmeter head.

In another optimized solution, both ends of the meter head connecting seat are respectively detachably connected to the flow meter head and the flow meter body.

In yet another optimized solution, a flow direction sign is provided on the barrel of the flowmeter body.

In a further optimization solution, the flowmeter body is an aluminum alloy flowmeter body.

In a further optimization scheme, the ultrasonic flowmeter includes a CPU processing module, a power processing conversion circuit, a signal processing module and an output module;

The power processing conversion circuit is used to provide power to the CPU processing module, and the CPU processing module provides power to receive the signal collected by the signal processing module and send it to the output module.

In a further optimization solution, the signal processing module includes a flow signal processing module, a pressure signal processing module and a temperature signal processing module;

The flow signal processing module is used to collect flow signals;

The pressure signal processing module is used to collect pressure signals;

The temperature signal processing module is used for collecting temperature signals.

In a further optimization scheme, the output module includes a working condition pulse output module, an RS-485 output module and a liquid crystal display.

After the utility model adopts the above technical scheme, compared with the prior art, the utility model has the following advantages: the two ends of the flowmeter body are respectively provided with pipeline connection threads, which are used to connect with the pipeline threads, and there is no need to use electric welding for installation, and the installation and disassembly are convenient fast;

There is a flow direction sign on the barrel of the flowmeter body, which is used to indicate the gas flow direction, avoid installation errors, and further improve the convenience of flowmeter installation;

The body of the flowmeter is made of aluminum alloy, which is light in weight, easy to carry, and reduces transportation costs.

The utility model is described in detail below in conjunction with accompanying drawing and embodiment.

Description of drawings

Accompanying drawing 1 is the structural representation of ultrasonic flow meter in the utility model embodiment;

Accompanying drawing 2 is the side view of accompanying drawing 1;

Accompanying drawing 3 is the top view of accompanying drawing 1;

Accompanying drawing 4 is the electrical principle block diagram of ultrasonic flow meter in the utility model embodiment;

In the figure,

1-Meter cover, 2-Flow meter head, 3-Meter head connection seat, 4-Flow meter body, 5-Flow direction label, 6-Keypad, 7-Data cable interface, 8-Temperature sensor, 9-Ultrasonic sensor Probe, 10-pipe connection thread, 11-display window.

Detailed ways

Embodiment, as shown in Fig. 1, Fig. 2 and Fig. 3, a kind of small-diameter gas ultrasonic flowmeter comprises a cylindrical flowmeter body 4, and the two ends of the flowmeter body 4 are respectively provided with pipe connecting threads 10 , used for threaded connection with the pipeline, no need for electric welding installation, convenient and quick installation and disassembly, flow direction sign 5 is provided on the cylinder of the flowmeter body 4, used to indicate the gas flow direction and avoid installation errors, the cavity of the flowmeter body 4 The body is provided with a temperature sensor 8 and an ultrasonic sensor probe 9. The middle part of the flowmeter body 4 is radially connected with a flowmeter head 2, and the flowmeter head 2 and the flowmeter body 4 are connected with a meter connection seat 3. The cavity of the meter connecting seat 3 is used to place a power supply battery pack, and the two ends of the meter connecting seat 3 are detachably connected with the flowmeter meter 2 and the flowmeter body 4 respectively.

The upper end of the meter head 2 of the flowmeter is connected with a meter cover 1, and the meter cover 1 is provided with a transparent display window 11 for observing measurement figures, and the meter head 2 of the flowmeter is provided with a window for setting and adjusting the flowmeter. Keypad 6 for parameters and data line interface 7 for data transmission.

The flowmeter body 4 is made of aluminum alloy, which is light in weight, easy to carry, and reduces transportation costs.

As shown in Figure 4, the ultrasonic flowmeter includes a CPU processing module, a power processing conversion circuit, a signal processing module and an output module, and the power processing conversion circuit can use an external power supply or an internal power supply. The circuit is used to provide power for the CPU processing module. The signal processing module includes a flow signal processing module, a pressure signal processing module and a temperature signal processing module. The CPU processing module receives the flow, temperature and pressure signals collected by the signal processing module and processes them. and converted to the output module, the output module includes a working condition pulse output module, an RS-485 output module and a liquid crystal display, and the liquid crystal display is used to display the flow, temperature and pressure data collected by the ultrasonic flowmeter, The RS-485 output module is used to transmit the flow, temperature and pressure signals to the corresponding signal receiving system, the working condition pulse output module is used to transmit the flow pulse signal to the corresponding instrument, the signal receiving system and The meters are determined according to the actual situation, which is the common technical knowledge of those skilled in the art, and will not be repeated in this embodiment.

The above descriptions are examples of the best implementation modes of the present utility model, and the parts not mentioned in detail are the common knowledge of those skilled in the art. The protection scope of the present utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the present utility model is also within the protection scope of the present utility model.

Claims (8)

1. a small-bore gas ultrasonic flow meter, comprise flowmeter bodies (4) and flowmeter meter (2), in the cavity of flowmeter bodies (4), be provided with temperature sensor (8) and ultrasonic sensor probe (9), it is characterized in that: the two ends of described flowmeter bodies (4) are respectively equipped with pipeline connecting thread (10).

2. the small-bore gas ultrasonic flow meter of one as claimed in claim 1, is characterized in that: between described flowmeter bodies (4) and flowmeter meter (2), be communicated with gauge outfit Connection Block (3).

3. the small-bore gas ultrasonic flow meter of one as claimed in claim 2, is characterized in that: the two ends of described gauge outfit Connection Block (3) removably connect with flowmeter meter (2) and flowmeter bodies (4) respectively.

4. as the one small-bore gas ultrasonic flow meter of claim 1-3 as described in one of them, it is characterized in that: the cylindrical shell of described flowmeter bodies (4) is provided with and flows to label (5).

5. the small-bore gas ultrasonic flow meter of one as claimed in claim 4, is characterized in that: described flowmeter bodies (4) is aluminium alloy flowmeter bodies.

6. the small-bore gas ultrasonic flow meter of one as claimed in claim 1, is characterized in that: described ultrasonic flow meter comprises CPU processing module, power supply processing change-over circuit, signal processing module and output module;

Described power supply is processed change-over circuit and is used to CPU processing module that power supply is provided, and CPU processing module provides the power supply reception signal that signal processing module collects and is delivered to output module.

7. the small-bore gas ultrasonic flow meter of one as claimed in claim 6, is characterized in that: described signal processing module comprises flow signal processing module, pressure signal processing module and processes temperature signal module;

Described flow signal processing module is used for gathering flow signal;

Described pressure signal processing module is used for gathering pressure signal;

Described processes temperature signal module is for collecting temperature signal.

8. the small-bore gas ultrasonic flow meter of one as claimed in claim 7, is characterized in that: described output module comprises operating mode pulse output module, RS-485 output module and LCDs.

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