Gas flow detection device

Abstract

The utility model belongs to the technical field of gas flow detection, and particularly relates to a gas flow detection device which comprises a gas flow detection body, a gas inlet pipeline is fixedly installed on the inner side of the gas flow detection body, and a gas outlet pipeline is fixedly installed at the bottom of the gas flow detection body. The outer sides of the gas flow detection main body and the sprinkler are fixedly provided with connecting flanges, the top of the gas flow detection main body is fixedly provided with a detector mounting pipeline, and through cooperative work of a differential pressure type flow sensor and a thermal mass flow sensor and in combination with a temperature and pressure compensation technology, the measurement precision of gas flow is effectively improved; the industrial production and experiment requirements with extremely high measurement precision requirements can be met; the two flow sensors with different principles complement each other, so that the measuring range of the device is widened, and the gas flow under various working conditions from extremely low flow to high flow can be accurately measured.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas flow detection technical field especially relates to a gas flow detection device. BACKGROUND

[0002] In the industrial production process, such as chemical industry, metallurgy, electric power and so on, accurate control gas flow is important to guarantee product quality, improve production efficiency and protect safety production. In the laboratory, the accurate measurement of gas flow is the basis for carrying out various experiments. In the civil field, the accurate detection of gas flow is related to energy metering and safe use.

[0003] However, the existing gas flow detection device has many drawbacks. The traditional mechanical flowmeter, such as rotor flowmeter, is easy to be affected by gas density, temperature and pressure change, and the range of measurement is limited, which is difficult to adapt to complex working conditions. Although the thermal gas mass flowmeter can directly measure the gas mass flow, it is sensitive to the change of gas composition, and the measurement error is large in the multi-component gas environment. The ultrasonic flowmeter needs accurate pipeline installation conditions, and is picky about the roughness and scaling of the inner wall of the pipeline, otherwise it will seriously affect the measurement accuracy; therefore we propose a gas flow detection device. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a gas flow detection device, which solves the existing problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A gas flow detection device, comprising a gas flow detection main part, an air inlet pipeline is fixedly installed on the inner side of the gas flow detection main part, an air outlet pipeline is fixedly installed at the bottom of the gas flow detection main part, connecting flanges are fixedly installed on the outer side of the gas flow detection main part and the air outlet pipeline, a detection instrument installation pipeline is fixedly installed at the top of the gas flow detection main part, a gas flow detector is arranged above the detection instrument installation pipeline, a threaded connection cylinder is fixedly installed on the outer side of the gas flow detector, a throttle orifice plate is fixedly installed on the inner side of the air inlet pipeline, a flow sensing module, a signal processing module, a data transmission and display module and a temperature and pressure compensation module are installed above the gas flow detector, and the gas flow detector is electrically connected with the flow sensing module, the signal processing module, the data transmission and display module and the temperature and pressure compensation module.

[0007] As a further improvement of the above scheme, threaded holes are formed in the top four corners of the connecting flanges, and the two connecting flanges are connected by bolts.

[0008] As a further improvement of the above-mentioned scheme, the detection instrument is provided with external threads on the outer side of the pipeline, and the inner wall of the threaded connecting cylinder is provided with internal threads.

[0009] As a further improvement of the above-mentioned scheme, the flow sensing module comprises a differential pressure flow sensor and a thermal mass flow sensor, and the differential pressure flow sensor and the thermal mass flow sensor are electrically connected to the gas flow detector.

[0010] As a further improvement of the above-mentioned scheme, the signal processing module comprises a data acquisition module and a microprocessor, the data acquisition module is electrically connected to the microprocessor, and the data acquisition module is electrically connected to the differential pressure flow sensor and the thermal mass flow sensor.

[0011] As a further improvement of the above-mentioned scheme, the data transmission and display module comprises a wireless transmission module and a display screen, the wireless transmission module is electrically connected to the data acquisition module, and the display screen is electrically connected to the wireless transmission module.

[0012] As a further improvement of the above-mentioned scheme, the temperature and pressure compensation module comprises a temperature sensor and a pressure sensor, and the temperature sensor and the pressure sensor are electrically connected to the gas flow detector.

[0013] Compared with the prior art, the gas flow detection device has the advantages that:

[0014] (1) The gas flow detection device can effectively improve the measurement accuracy of gas flow by the cooperative work of the differential pressure flow sensor and the thermal mass flow sensor, combined with temperature and pressure compensation technology, and can meet the requirements of industrial production and experimental demand with extremely high measurement accuracy; the two flow sensors with different principles complement each other, broaden the range of the device, and can accurately measure the gas flow under various working conditions from extremely low flow to high flow.

[0015] (2) The gas flow detection device can automatically adapt to the changes of gas temperature, pressure and composition, and through compensation algorithm and multi-sensor fusion technology, accurate flow measurement results can be ensured under complex working conditions; wireless data transmission and remote monitoring functions are provided, which facilitates the operation personnel to master the gas flow information in real time, and realizes intelligent management. At the same time, the alarm function of the display screen can discover abnormal conditions in time, and ensures the safety of production. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings described in the following description are only some embodiments of the present application, and for the ordinary skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 A perspective structural schematic view of a gas flow detection device is provided for the present application.

[0018] Figure 2 A perspective structural schematic view of a gas flow detection device is provided for the present application.

[0019] Figure 3 A perspective structural schematic view of a gas flow detection device is provided for the present application.

[0020] Figure 4 A perspective structural schematic view of a gas flow detection device is provided for the present application.

[0021] In the figure: 1, gas flow detection main body; 2, gas inlet pipeline; 3, gas outlet pipeline; 4, connecting flange; 5, detector installation pipeline; 6, gas flow detector; 7, threaded connection cylinder; 8, throttle orifice plate; 9, flow sensing module; 10, signal processing module; 11, data transmission and display module; 12, temperature and pressure compensation module; 13, differential pressure flow sensor; 14, thermal mass flow sensor; 15, data acquisition module; 16, microprocessor; 17, wireless transmission module; 18, display screen; 19, temperature sensor; 20, pressure sensor. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application, obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the ordinary skilled in the art without creative labor are within the protection scope of the present application.

[0023] REFERENCE Figures 1-4The utility model provides a gas flow detection device, including gas flow detection main part 1, the inside fixed mounting of gas flow detection main part 1 has the air inlet pipe 2, the bottom fixed mounting of gas flow detection main part 1 has the air outlet pipe 3, the outside fixed mounting of gas flow detection main part 1 and the outside has the connecting flange 4, the top fixed mounting of gas flow detection main part 1 has the detector installation pipeline 5, the top of detector installation pipeline 5 is provided with gas flow detector 6, the outside fixed mounting of gas flow detector 6 has screw thread connection cylinder 7, the inside fixed mounting of air inlet pipe 2 has throttle orifice plate 8, the top of gas flow detector 6 is installed with flow sensing module 9, signal processing module 10, data transmission and display module 11 and temperature and pressure compensation module 12, and gas flow detector 6 is electrically connected with flow sensing module 9, signal processing module 10, data transmission and display module 11 and temperature and pressure compensation module 12;Differential pressure type flow sensor 13 adopts high-precision differential pressure transmitter, cooperates with special throttle orifice plate 8;Install in the inside of air inlet pipe 2, when gas flows through throttle orifice plate 8, will produce differential pressure on its upstream and downstream;Differential pressure transmitter can accurately measure this differential pressure value, and it is converted into electric signal output;Through the mathematical model of differential pressure and flow established in advance, the gas flow can be accurately calculated;Can satisfy the requirement of high-precision measurement of most industrial scenes;Thermal mass flow sensor 14 as auxiliary measurement means, thermal mass flow sensor 14 utilizes the cooling effect of gas to heating element to measure gas mass flow;Sensor built-in heating wire and temperature sensor, when gas flows, take away the heat of heating wire, cause temperature change, and temperature sensor converts this change into electric signal;Thermal mass flow sensor can provide more accurate measurement in low flow range, and is supplemented with differential pressure type flow sensor, widens the range of device, makes it can adapt to different working conditions from small flow to larger flow;In the embodiment, the top four corners of connecting flange 4 are provided with threaded holes, and the two connecting flanges 4 are connected by bolts;In the embodiment, the outside of detector installation pipeline 5 is provided with external thread, and the inner wall of screw thread connection cylinder 7 is provided with internal thread.

[0024] In the embodiment, the flow sensing module 9 includes a differential pressure flow sensor 13 and a thermal mass flow sensor 14, which are electrically connected with the gas flow detector 6; in the embodiment, the signal processing module 10 includes a data acquisition module 15 and a microprocessor 16, the data acquisition module 15 is electrically connected with the microprocessor 16, and the data acquisition module 15 is electrically connected with the differential pressure flow sensor 13 and the thermal mass flow sensor 14; a high-performance microprocessor 16 is adopted to perform real-time analysis and calculation on the collected signals; according to a pre-stored algorithm, in combination with compensation parameters such as temperature and pressure of the gas, which can be obtained through external temperature and pressure sensors, the measurement data is corrected to eliminate the influence of the change of the state of the gas on the flow measurement, so as to obtain an accurate gas flow value; the microprocessor also has a data storage function, and can store flow data within a certain time, facilitating subsequent query and analysis.

[0025] In the embodiment, the data transmission and display module 11 includes a wireless transmission module 17 and a display screen 18, the wireless transmission module 17 is electrically connected with the data acquisition module 15, and the display screen 18 is electrically connected with the wireless transmission module 17; the wireless transmission module 17 is integrated with a wireless transmission module such as Bluetooth, Wi-Fi, 4G, etc., and can transmit the flow data calculated by the microprocessor to a remote monitoring center or an upper computer in real time; through wireless transmission, the operator can obtain the gas flow information in real time at a place far away from the detection site, so as to realize remote monitoring and management; the display screen 18 is equipped with a liquid crystal display screen on the device body, which can directly display the current gas flow value, temperature, pressure and other related parameters; the display screen adopts a high-contrast and wide-view-angle design, so that the operator can clearly read the data in different environments; at the same time, the display screen can also set an alarm threshold, and when the gas flow exceeds or is lower than the set threshold, the display screen will issue an audible and visual alarm signal to remind the operator to handle it in time.

[0026] In the embodiment, the temperature and pressure compensation module 12 includes a temperature sensor 19 and a pressure sensor 20, which are electrically connected with the gas flow detector 6; the temperature sensor 19 is a high-precision platinum resistance temperature sensor, which is installed in the gas pipeline to measure the temperature of the gas in real time; the temperature sensor transmits the measured temperature signal to the microprocessor for temperature compensation of the gas flow; because the density of the gas changes with the change of the temperature, the temperature compensation can improve the accuracy of the flow measurement; the pressure sensor 20 is a capacitive pressure sensor, which is also installed in the gas pipeline to monitor the pressure of the gas in real time; the pressure sensor transmits the pressure signal to the microprocessor for pressure compensation of the gas flow; the change of the gas pressure will also affect the gas density and then affect the flow measurement result, and the pressure compensation can effectively eliminate this influence; in the embodiment, a plurality of holes are formed on one side of the throttle orifice plate 8.

[0027] The implementation principle of the gas flow detection device in the embodiment of the application is as follows: the device installs the gas flow detector 6 above the gas flow detection main body 1 through the threaded cooperation of the threaded connection cylinder 7 and the detection instrument installation pipeline 5, and the top inner wall of the threaded connection cylinder 7 is provided with a sealing rubber ring, so that the gas flow detector 6 has good airtightness during detection;

[0028] The differential pressure flow sensor 13 adopts a high-precision differential pressure transmitter and is matched with a specially-made throttling orifice plate 8, is installed on the inner side of the gas inlet pipeline 2, and when the gas flows through the throttling orifice plate 8, differential pressure is generated on the upstream and downstream of the throttling orifice plate 8; the differential pressure transmitter can accurately measure the differential pressure value and convert it into an electrical signal output; through a previously established mathematical model of differential pressure and flow, the gas flow can be accurately calculated; the differential pressure flow sensor 13 can meet the requirements of high-precision measurement in most industrial scenes;

[0029] The thermal mass flow sensor 14 is used as an auxiliary measurement means, and the thermal mass flow sensor 14 measures the gas mass flow by using the cooling effect of the gas on the heating element; the sensor is internally provided with a heating wire and a temperature sensor, when the gas flows, the heat of the heating wire is taken away, causing a change in temperature, and the temperature sensor converts the change into an electrical signal; the thermal mass flow sensor can provide more accurate measurement in the low flow range, and is complementary to the differential pressure flow sensor, thereby widening the range of the device and enabling it to adapt to different working conditions from small flow to large flow;

[0030] The data acquisition module 15 is responsible for collecting the electrical signals output by the differential pressure flow sensor 13 and the thermal mass flow sensor 14, and performing preliminary amplification and filtering processing on the electrical signals, removing noise interference in the signals, and improving the stability and reliability of the signals;

[0031] The high-performance microprocessor 16 is adopted to perform real-time analysis and calculation on the collected signals; according to a previously stored algorithm, in combination with compensation parameters such as the temperature and pressure of the gas, which can be obtained through external temperature sensors and pressure sensors, the measurement data is corrected to eliminate the influence of the change in the state of the gas on the flow measurement, so as to obtain an accurate gas flow value; the microprocessor also has a data storage function, and can store flow data within a certain time, facilitating subsequent query and analysis;

[0032] The wireless transmission module 17 device is integrated with a wireless transmission module such as Bluetooth, Wi-Fi, 4G, etc., and can transmit the flow data calculated by the microprocessor to a remote monitoring center or an upper computer in real time; through wireless transmission, the operator can obtain the gas flow information in real time in a place far away from the detection site, so as to realize remote monitoring and management;

[0033] The display screen 18 is equipped with a liquid crystal display screen on the device body, which can directly display the current gas flow value, temperature, pressure and other related parameters; the display screen adopts a high-contrast, wide-view design, which facilitates the operator to clearly read the data in different environments; at the same time, the display screen can also set an alarm threshold, when the gas flow exceeds or is lower than the set threshold, the display screen will issue an audible and visual alarm signal to remind the operator to handle it in time;

[0034] The temperature sensor 19 selects a high-precision platinum resistance temperature sensor, which is installed in the gas pipeline to measure the gas temperature in real time; the temperature sensor transmits the measured temperature signal to the microprocessor for temperature compensation of the gas flow; because the density of the gas changes with temperature, the accuracy of the flow measurement can be improved through temperature compensation;

[0035] The pressure sensor 20 adopts a capacitive pressure sensor, which is also installed in the gas pipeline to monitor the gas pressure in real time; the pressure sensor transmits the pressure signal to the microprocessor for pressure compensation of the gas flow; the change of the gas pressure will also affect the gas density, and then affect the flow measurement result, and the influence can be effectively eliminated through pressure compensation;

[0036] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The above describes a gas flow detection device provided by the present application in detail. The principles and implementation modes of the present application are described by applying specific embodiments in this paper, and the description of the above embodiments is only applicable to help understand the method and core idea of the present application. It should be pointed out that for ordinary skilled persons in the technical field, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A gas flow detection device, characterized in that, The utility model relates to a gas flow detection device, including: Gas flow detection main part (1), the inner side fixed mounting of gas flow detection main part (1) has the air inlet pipeline (2), the bottom fixed mounting of gas flow detection main part (1) has the air outlet pipeline (3), the outer side fixed mounting of gas flow detection main part (1) and the sparge has the connecting flange (4), the top fixed mounting of gas flow detection main part (1) has the detection instrument installation pipeline (5), the top of detection instrument installation pipeline (5) is provided with gas flow detector (6), the outer side fixed mounting of gas flow detector (6) has screw thread connection cylinder (7), the inner side fixed mounting of air inlet pipeline (2) has throttle orifice plate (8), the top of gas flow detector (6) is installed with flow sensing module (9), signal processing module (10), data transmission and display module (11) and temperature and pressure compensation module (12), gas flow detector (6) is electrically connected with flow sensing module (9), signal processing module (10), data transmission and display module (11) and temperature and pressure compensation module (12).

2. The gas flow detection device according to claim 1, wherein The top of connecting flange (4) is provided with threaded hole in four corners, and two connecting flanges (4) are connected by bolts.

3. The gas flow detection device of claim 1, wherein The outer side of detection instrument installation pipeline (5) is provided with external thread, and the inner wall of screw thread connection cylinder (7) is provided with internal thread.

4. The gas flow detection device of claim 1, wherein Flow sensing module (9) includes differential pressure type flow sensor (13) and thermal mass flow sensor (14), and differential pressure type flow sensor (13) and thermal mass flow sensor (14) are electrically connected with gas flow detector (6).

5. The gas flow detection device of claim 1, wherein Signal processing module (10) includes data acquisition module (15) and microprocessor (16), data acquisition module (15) is electrically connected with microprocessor (16), and data acquisition module (15) is electrically connected with differential pressure type flow sensor (13) and thermal mass flow sensor (14).

6. The gas flow detection device of claim 1, wherein Data transmission and display module (11) includes wireless transmission module (17) and display screen (18), wireless transmission module (17) is electrically connected with data acquisition module (15), and display screen (18) is electrically connected with wireless transmission module (17).

7. The gas flow detection device of claim 1, wherein Temperature and pressure compensation module (12) includes temperature sensor (19) and pressure sensor (20), and temperature sensor (19) and pressure sensor (20) are electrically connected with gas flow detector (6).

8. The gas flow detection device of claim 1, wherein A plurality of holes are formed in one side of throttle orifice plate (8).

Images