Turbulent flow device and gas flow monitoring equipment

Abstract

The utility model provides a turbulent flow device and gas flow monitoring equipment, and relates to the technical field of gas flow monitoring, the turbulent flow device comprises a mounting short pipe, a heating rod and a temperature control element, the mounting short pipe is used for being mounted on a flow velocity meter mounting base on the outer wall of a pipeline to be measured; one end of the heating rod is used for penetrating through the flow meter mounting base and extending into a to-be-detected pipeline, and the other end of the heating rod is connected to the mounting short pipe and extends out of the pipe wall of the mounting short pipe; the temperature control element is connected with one end, extending out of the mounting short pipe, of the heating rod and is used for controlling the heating rod to heat gas in the to-be-detected pipeline. Compared with the prior art, the number of heating turbulent flows is increased by increasing heat sources, the problem that equipment cannot work normally due to the fact that gas entering a pipeline is low in temperature, unstable in flow field and little in turbulent flow and cannot provide a strong enough signal-to-noise ratio for flow velocity measurement is solved, and the measurement accuracy of the light scintillation gas flowmeter is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas flow monitoring, and in particular, to a flow disturbance device and a gas flow monitoring device. Background Art

[0002] The OFS optical scintillation gas flowmeter measures the gas flow velocity based on the optical scintillation principle. It consists of an optical emission unit, an optical reception unit, and a signal processing and control unit, and is an optical flow sensor. The emission unit and the reception unit are respectively arranged on both sides of the gas flow path. The emission unit emits a modulated light beam through the gas flow, and the reception unit receives this light beam and converts it into an electrical signal, which is processed by the signal processing unit and then converted into a flow velocity signal.

[0003] The basis for the OFS optical scintillation gas flowmeter to measure the gas flow velocity is optical scintillation, that is, the flashing of light intensity. Optical scintillation is the change in light intensity caused by light passing through gas masses with different temperatures and densities. Therefore, heated, turbulent, and flowing gas provides the optimal scintillation. However, in actual applications, in some application environments, due to the low gas temperature, the turbulence contained therein cannot provide a strong enough signal-to-noise ratio. In this signal-to-noise ratio, the signal refers to hot or different-density turbulence, and the noise is vibration and electronic interference. Therefore, the existing gas flow velocity measurement schemes are difficult to ensure their accuracy in low-temperature environments, making the equipment unable to work properly. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a flow disturbance device and a gas flow monitoring device, which can realize the flow disturbance of gas, and solve the problem that due to the low temperature of the gas entering the pipeline, the flow field is unstable, the turbulence is less, and it cannot provide a strong enough signal-to-noise ratio for flow velocity measurement, resulting in the equipment being unable to work properly.

[0005] The embodiments of the utility model are implemented as follows:

[0006] In a first aspect, the utility model provides a flow disturbance device, including:

[0007] An installation short pipe, which is used to be installed on the flowmeter installation base on the outer wall of the pipeline to be measured;

[0008] A heating rod, one end of which is used to pass through the flowmeter installation base and extend into the pipeline to be measured, and the other end of the heating rod is connected to the installation short pipe and extends out of the pipe wall of the installation short pipe;

[0009] A temperature control element, which is connected to the end of the heating rod extending out of the installation short pipe, and is used to control the heating rod to heat the gas in the pipeline to be measured.

[0010] In an alternative embodiment, the heating rod includes a heating sleeve, a heater, and connecting wires. One end of the heating sleeve is for extending into the pipeline to be measured, and the other end extends out of the mounting stub pipe and is connected to the temperature control element. The heater is accommodated at one end of the heating sleeve that extends into the pipeline to be measured and is used for heating the heating sleeve located within the pipeline to be measured. The connecting wires are disposed within the heating sleeve, and one end of the connecting wires is connected to the heater, and the other end is connected to the temperature control element.

[0011] In an alternative embodiment, the heating sleeve includes a connecting bent section, a first straight section, a bent section, and a second straight section that are connected in sequence. The connecting bent section passes through the mounting stub pipe, and one end of the connecting bent section that extends out of the mounting stub pipe is connected to the temperature control element. One end of the first straight section is connected to the end of the connecting bent section away from the temperature control element, and the first straight section is for passing through the flowmeter mounting base and entering the pipeline to be measured. The bent section is connected to the end of the first straight section away from the connecting bent section and is bent radially relative to the first straight section. The second straight section is connected to the end of the bent section away from the first straight section and is for being horizontally disposed within the pipeline to be measured. Among them, the heater is disposed in the first straight section.

[0012] In an alternative embodiment, the first straight section and the second straight section are parallel to each other, and the first straight section is spaced from the axis of the mounting stub pipe. The distance between the second straight section and the axis of the mounting stub pipe is greater than the distance between the first straight section and the axis of the mounting stub pipe.

[0013] In an alternative embodiment, the heating rod further includes a thermocouple. The thermocouple is disposed within the heater and is electrically connected to the temperature control element through the connecting wires for measuring the heating temperature.

[0014] In an alternative embodiment, the temperature control element includes a temperature controller and a temperature control housing. The temperature control housing is provided with a mounting joint, and the heating sleeve is detachably connected to the mounting joint. The temperature controller is disposed within the temperature control housing and is connected to the connecting wires.

[0015] In an alternative embodiment, a threaded joint is further provided at one end of the heating sleeve that extends out of the mounting stub pipe. The mounting joint is provided with a threaded hole, and the threaded joint is threadedly assembled in the threaded hole.

[0016] In an alternative embodiment, first flange rings close to the temperature control element and second flange rings away from the temperature control element are provided at both ends of the mounting stub pipe. The first flange rings are for connecting to the flowmeter mounting base, and the second flange rings are for connecting to a flow rate monitor.

[0017] In a second aspect, the present utility model provides a gas flow monitoring device, which includes a flow velocity monitor, a flow velocity monitor mounting base, and a flow disturbance device according to any one of the foregoing embodiments. The flow velocity monitor mounting base is used to be arranged on the opposite outer sidewalls of a pipeline to be measured. The transmitting end of the flow velocity monitor is arranged on the flow velocity monitor mounting base on one side, the mounting short pipe is arranged on the flow velocity monitor mounting base on the other side, and the receiving end of the flow velocity monitor is arranged on the mounting short pipe.

[0018] In an optional embodiment, the part of the heating rod extending into the pipeline to be measured is located upstream of the flow field at the optical path center of the flow velocity monitor, and is used to heat the gas in the flow field passing through the optical path center.

[0019] The beneficial effects of the embodiments of the present utility model include:

[0020] The flow disturbance device and the gas flow monitoring device provided by the embodiments of the present utility model realize the heating of the gas in the pipeline to be measured by setting a heating rod, and passing one end of the heating rod through the flow velocity monitor mounting base and extending it into the pipeline to be measured. The heating rod is controlled by a temperature control element and is fixedly installed by the mounting short pipe. Compared with the prior art, the present utility model increases the number of turbulences by adding a heat source, solves the problem that the device cannot work properly because the temperature of the gas entering the pipeline is low, the flow field is unstable, and there are few turbulences, which cannot provide a strong enough signal-to-noise ratio for flow velocity measurement, and ensures the accuracy of the measurement of the optical flash gas flowmeter. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic diagram of the flow disturbance device provided by the embodiment of the present utility model from the first perspective;

[0023] Figure 2 It is a cross-sectional view of the flow disturbance device provided by the embodiment of the present utility model;

[0024] Figure 3 It is a schematic diagram of the flow disturbance device provided by the embodiment of the present utility model from the second perspective;

[0025] Figure 4 It is an assembly schematic diagram of the gas flow monitoring device provided by the embodiment of the present utility model.

[0026] ICON:

[0027] 100 - Turbulence device; 110 - Installation stub; 111 - First flange ring; 113 - Second flange ring; 130 - Heating rod; 131 - Heating sleeve; 1311 - Connecting bend; 1313 - First straight section; 1315 - Bending section; 1317 - Second straight section; 133 - Heater; 135 - Connecting wire; 137 - Thermocouple; 139 - Threaded joint; 150 - Temperature control element; 151 - Temperature controller; 153 - Temperature control housing; 155 - Installation joint; 200 - Gas flow monitoring device; 210 - Flow velocity monitor; 230 - Flow velocity meter installation base. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed when in use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be construed as indicating or implying relative importance.

[0032] In addition, terms such as "horizontal" and "vertical" do not require the components to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0033] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. Specific embodiments

[0035] Please refer to Figure 1 and Figure 4 , this embodiment provides a flow disturbance device 100, which is applied to a gas flow monitoring device 200 and can realize the flow disturbance of gas, solving the problem that the gas entering the pipeline has a low temperature, an unstable flow field, and little turbulence, and cannot provide a strong enough signal-to-noise ratio for flow velocity measurement, resulting in the abnormal operation of the device.

[0036] The flow disturbance device 100 provided by the embodiment of the present invention includes a mounting stub 110, a heating rod 130, and a temperature control element 150. The mounting stub 110 is used to be mounted on a flow velocity meter mounting base 230 on the outer wall of the pipeline to be measured; one end of the heating rod 130 is used to pass through the flow velocity meter mounting base 230 and extend into the pipeline to be measured, and the other end of the heating rod 130 is connected to the mounting stub 110 and extends out of the pipe wall of the mounting stub 110; the temperature control element 150 is connected to the end of the heating rod 130 extending out of the mounting stub 110 and is used to control the heating rod 130 to heat the gas in the pipeline to be measured.

[0037] It should be noted that there is gas to be measured flowing in the pipeline to be measured, the flow velocity meter mounting base 230 is fixedly arranged on the outer wall of the pipeline to be measured, and the mounting stub 110 is detachably arranged on the flow velocity meter mounting base 230 to realize the base installation. The mounting stub 110 can provide structural support for the heating rod 130. One end of the heating rod 130 passes through the flow velocity meter mounting base 230 and extends into the pipeline to be measured to heat the gas in the pipeline to be measured, solving the problem that the gas entering the pipeline has a low temperature, an unstable flow field, and little turbulence, and cannot provide a strong enough signal-to-noise ratio for flow velocity measurement, resulting in the abnormal operation of the device, ensuring the accuracy of the measurement of the optical scintillation gas flowmeter. At the same time, the heating rod 130 is controlled by the temperature control element 150 and is fixedly installed by the mounting stub 110.

[0038] It should be noted that the short pipe 110 is directly installed on the flowmeter installation base 230 here, so that the flow disturbance device 100 and the flow monitor 210 can share the same installation hole and installation base, reducing the installation cost of construction, without the need for additional hole opening and being unrestricted by on-site hole opening.

[0039] Furthermore, referring to Figure 2 , the heating rod 130 includes a heating sleeve 131, a heater 133 and a connecting wire 135. One end of the heating sleeve 131 is used to extend into the pipeline to be measured, and the other end extends out of the short pipe 110 and is connected to the temperature control element 150. The heater 133 is accommodated at one end of the heating sleeve 131 extending into the pipeline to be measured and is used to heat the heating sleeve 131 located in the pipeline to be measured. The connecting wire 135 is arranged in the heating sleeve 131, and one end of the connecting wire 135 is connected to the heater 133 and the other end is connected to the temperature control element 150. Specifically, the heating sleeve 131 can be made of a heat-conducting material. The heater 133 is fixedly arranged inside the heating sleeve 131 and is located in the pipeline to be measured to heat the gas in the pipeline to be measured. The connecting wire 135 is embedded in the heating sleeve 131 to realize the power supply and control of the heater 133.

[0040] In this embodiment, the heating sleeve 131 includes a connecting bent section 1311, a first straight section 1313, a bent section 1315 and a second straight section 1317 which are connected in sequence. The connecting bent section 1311 passes through the short pipe 110, and one end of the connecting bent section 1311 extending out of the short pipe 110 is connected to the temperature control element 150. One end of the first straight section 1313 is connected to the end of the connecting bent section 1311 away from the temperature control element 150, and the first straight section 1313 is used to pass through the flowmeter installation base 230 and enter the pipeline to be measured. The bent section 1315 is connected to the end of the first straight section 1313 away from the connecting bent section 1311 and is bent radially relative to the first straight section 1313. The second straight section 1317 is connected to the end of the bent section 1315 away from the first straight section 1313 and is used to be horizontally placed in the pipeline to be measured. Among them, the heater 133 is arranged on the first straight section 1313. Specifically, the connecting bent section 1311, the first straight section 1313, the bent section 1315 and the second straight section 1317 are preferably integrally formed, and the connecting bent section 1311 can partially be in the shape of a 1 / 4 arc, so that the connecting bent section 1311 can extend from the horizontal section inside the short pipe 110 to the outside and realize the vertical installation of the temperature control element 150.

[0041] It should be noted that, in order to ensure the durability and prevent the wear and corrosion of the heater 133 under harsh working conditions, Hastelloy is used for the second straight section 1317 here. Since the connecting bend section 1311, the first straight section 1313 and the bending section 1315 are integrally arranged, Hastelloy is used for all of them. It has good thermal conductivity and corrosion / wear resistance, extends the service life of the product, increases the reliability of long-term use, and reduces the maintenance cost of later operation.

[0042] In this embodiment, the first straight section 1313 and the second straight section 1317 are parallel, and the first straight section 1313 is spaced from the axis of the installation short pipe 110. The distance between the second straight section 1317 and the axis of the installation short pipe 110 is greater than the distance between the first straight section 1313 and the axis of the installation short pipe 110. Specifically, the axis of the installation short pipe 110 coincides with the optical path center of the flow velocity monitor 210. By setting the bending section 1315 here, the second straight section 1317 can be made to be farther away from the optical path center relative to the first straight section 1313, avoiding the interference effect of the second straight section 1317 on the normal monitoring of the flow velocity monitor 210.

[0043] Furthermore, the heating rod 130 further includes a thermocouple 137. The thermocouple 137 is arranged in the heater 133 and is electrically connected to the temperature control element 150 through a connecting wire 135 for measuring the heating temperature. Specifically, by setting the thermocouple 137, the heating temperature can be measured. The temperature control element 150 can control the heating temperature of the heater 133 within a set range according to the measured temperature, ensuring that the heating temperature of the measured gas flowing through the heater 133 is constant, so as to save electric energy while ensuring sufficient turbulence.

[0044] In this embodiment, the temperature control element 150 includes a temperature controller 151 and a temperature control housing 153. The temperature control housing 153 is provided with an installation joint 155. The heating sleeve 131 is detachably connected to the installation joint 155. The temperature controller 151 is arranged in the temperature control housing 153 and is connected to the connecting wire 135. Specifically, the basic structure and temperature control principle of the temperature controller 151 can refer to the relevant descriptions in the existing temperature control technology. The temperature controller 151 is electrically connected to the heater 133 and the thermocouple 137 through the connecting wire 135, and it can automatically adjust the output power of the heater 133 according to the temperature measured by the thermocouple 137 and the set temperature.

[0045] In this embodiment, a threaded joint 139 is further provided at one end of the heating sleeve 131 extending out of the mounting stub pipe 110. The mounting joint 155 is provided with a threaded hole, and the threaded joint 139 is threadedly assembled in the threaded hole. Specifically, the threaded joint 139 and the heating sleeve 131 can be movably connected. The threaded joint 139 is inserted into the threaded hole and threadedly fixed to the mounting joint 155, so as to ensure the fixed connection between the heating sleeve 131 and the temperature control element 150 and facilitate maintenance.

[0046] See Figure 3 , in this embodiment, first flange rings 111 close to the temperature control element 150 and second flange rings 113 far from the temperature control element 150 are provided at both ends of the mounting stub pipe 110. The first flange rings 111 are used to connect to the flowmeter mounting base 230, and the second flange rings 113 are used to connect to the flow rate monitor 210. Specifically, the first flange rings 111 and the second flange rings 113 are arranged in parallel with each other, and a plurality of threaded holes are provided on both the first flange rings 111 and the second flange rings 113. The first flange rings 111 are connected and fixed to the flange rings on the flowmeter mounting base 230 through the threaded holes, and the second flange rings 113 are connected and fixed to the flange rings on the flow rate monitor 210 through the threaded holes, so as to install the mounting stub pipe 110 between the flow rate monitor 210 and the flowmeter mounting base 230, realizing the fixed assembly of the flow disturbance device 100.

[0047] See Figure 4 , this embodiment of the present invention also provides a gas flow rate monitoring device 200, including a flow rate monitor 210, a flowmeter mounting base 230, and a flow disturbance device 100. The flow disturbance device 100 includes a mounting stub pipe 110, a heating rod 130, and a temperature control element 150. The mounting stub pipe 110 is used to be mounted on the flowmeter mounting base 230 on the outer wall of the pipeline to be measured; one end of the heating rod 130 is used to pass through the flowmeter mounting base 230 and extend into the pipeline to be measured, and the other end of the heating rod 130 is connected to the mounting stub pipe 110 and extends out of the pipe wall of the mounting stub pipe 110; the temperature control element 150 is connected to one end of the heating rod 130 extending out of the mounting stub pipe 110, and is used to control the heating rod 130 to heat the gas in the pipeline to be measured. The flowmeter mounting base 230 is used to be arranged on the opposite outer side walls of the pipeline to be measured. The transmitting end of the flow rate monitor 210 is arranged on one side of the flowmeter mounting base 230, the mounting stub pipe 110 is arranged on the other side of the flowmeter mounting base 230, and the receiving end of the flowmeter monitor is arranged on the mounting stub pipe 110.

[0048] In this embodiment, the part of the heating rod 130 extending into the pipeline to be measured is located upstream of the flow field at the optical path center of the flow velocity monitor 210, and is used to heat the gas flowing through the flow field at the optical path center. Specifically, the second straight section 1317 of the heating rod 130 is arranged upstream of the gas flow field, so as to heat the gas. By heating, the gas scintillation level in the adjacent area is increased to a certain scintillation level that can be locked by the downstream flow velocity monitor 210. The heated gas has more turbulence, and the light intensity will flicker when flowing through the optical path of the flow velocity monitor. At the receiving end of the flow velocity monitor 210, two detectors detect the light intensity flicker caused by the thermal turbulence, providing a signal-to-noise ratio with sufficient intensity for subsequent signal analysis and ensuring the accuracy of measurement under low-temperature conditions.

[0049] It should be noted that the flow velocity monitor 210 here can be an OFS optical scintillation gas flowmeter, and its basic structure and measurement principle can refer to the existing OFS optical scintillation gas flowmeter.

[0050] In summary, for the flow disturbance device 100 and the gas flow monitoring device 200 provided in this embodiment, by setting the heating rod 130 and passing one end of the heating rod 130 through the flow velocity meter mounting base 230 and extending it into the pipeline to be measured, the gas in the pipeline to be measured is heated. The heating rod 130 is controlled by the temperature control element 150 and is fixedly installed by the mounting short pipe 110. Compared with the prior art, the present invention increases the number of turbulences by adding a heat source, solves the problem that the device cannot work properly because the gas temperature entering the pipeline is low, the flow field is unstable, and there are few turbulences, which cannot provide a strong enough signal-to-noise ratio for flow velocity measurement, and ensures the accuracy of the optical scintillation gas flowmeter measurement, expanding the application range of the flow velocity meter. And the heating sleeve 131 uses Hastelloy with wear resistance and corrosion resistance, extending the service life of the product, increasing the reliability of the long-term use of the flow velocity meter, and reducing the maintenance cost of the later operation. The flow disturbance device 100 adopts constant temperature control, saving electric energy while ensuring sufficient turbulences are generated.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any 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. A spoiler device, characterized in that: include: A short installation tube, the short installation tube is used to be installed on a flow meter installation base on the outer wall of the pipeline to be measured; A heating rod, one end of which is used to pass through the flow meter mounting base and extend into the pipeline to be tested, so as to heat the gas in the pipeline to be tested, and the other end of which is connected to the installation short pipe and extends out of the pipe wall of the installation short pipe; A temperature control element is connected to one end of the heating rod extending out of the installation short tube, and is used to control the heating rod to heat the gas in the pipeline to be tested.

2. The spoiler device according to claim 1, characterized in that: The heating rod includes a heating sleeve, a heater and a connecting wire. One end of the heating sleeve is used to extend into the pipeline to be tested, and the other end extends out of the installation short tube and is connected to the temperature control element. The heater is accommodated in the end of the heating sleeve extending into the pipeline to be tested, and is used to heat the heating sleeve located in the pipeline to be tested. The connecting wire is arranged in the heating sleeve, and one end of the connecting wire is connected to the heater, and the other end is connected to the temperature control element.

3. The spoiler device according to claim 2, characterized in that: The heating sleeve includes a connecting bend section, a first straight section, a bent section, and a second straight section connected in sequence, the connecting bend section is passed through the installation short tube, and one end of the connecting bend section extending out of the installation short tube is connected to the temperature control element, one end of the first straight section is connected to an end of the connecting bend section away from the temperature control element, and the first straight section is used to pass through the velocity meter mounting base and enter the pipeline to be measured, the bent section is connected to an end of the first straight section away from the connecting bend section, and is bent radially relative to the first straight section, the second straight section is connected to an end of the bent section away from the first straight section, and is used to be placed horizontally in the pipeline to be measured, wherein the heater is arranged in the first straight section.

4. The spoiler device according to claim 3, characterized in that: The first straight line segment and the second straight line segment are parallel, and the first straight line segment is spaced apart from the axis of the installation short tube, and the distance between the second straight line segment and the axis of the installation short tube is greater than the distance between the first straight line segment and the axis of the installation short tube.

5. The spoiler device according to claim 2, characterized in that: The heating rod also includes a thermocouple, which is arranged in the heater and electrically connected to the temperature control element through the connecting wire for measuring the heating temperature.

6. The spoiler device according to claim 2, characterized in that: The temperature control element comprises a temperature controller and a temperature control housing. The temperature control housing is provided with a mounting joint. The heating sleeve is detachably connected to the mounting joint. The temperature controller is arranged in the temperature control housing and connected to the connecting wire.

7. The spoiler device according to claim 6, characterized in that: The end of the heating sleeve extending out of the mounting short tube is also provided with a threaded joint, the mounting joint is provided with a threaded hole, and the threaded joint is threadedly assembled in the threaded hole.

8. The spoiler device according to claim 1, characterized in that: The two ends of the installation short tube are provided with a first flange ring close to the temperature control element and a second flange ring away from the temperature control element. The first flange ring is used to connect with the flow meter mounting base, and the second flange ring is used to connect with the flow rate monitor.

9. A gas flow monitoring device, characterized in that: It includes a flow rate monitor, a flow rate meter mounting base and a flow disturbance device as described in any one of claims 1 to 8, wherein the flow rate meter mounting base is used to be arranged on the outer side wall opposite to the pipe to be measured, the transmitting end of the flow rate monitor is arranged on the flow rate meter mounting base on one side, the mounting short tube is arranged on the flow rate meter mounting base on the other side, and the receiving end of the flow rate monitor is arranged on the mounting short tube.

10. The gas flow monitoring device according to claim 9, characterized in that: The portion of the heating rod extending into the pipeline to be tested is located upstream of the flow field at the center of the optical path of the flow velocity monitor, and is used to heat the gas passing through the flow field at the center of the optical path.

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