CN106225860B - Ultrasonic flue gas flowmeter - Google Patents
Ultrasonic flue gas flowmeter Download PDFInfo
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- CN106225860B CN106225860B CN201610809942.3A CN201610809942A CN106225860B CN 106225860 B CN106225860 B CN 106225860B CN 201610809942 A CN201610809942 A CN 201610809942A CN 106225860 B CN106225860 B CN 106225860B
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- 239000003546 flue gas Substances 0.000 title claims abstract description 52
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 239000000523 sample Substances 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 12
- 238000012544 monitoring process Methods 0.000 abstract description 11
- 239000000779 smoke Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 7
- 230000005484 gravity Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 15
- 238000009434 installation Methods 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 7
- 229910001069 Ti alloy Inorganic materials 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229910001040 Beta-titanium Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000738 capillary electrophoresis-mass spectrometry Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000002463 transducing effect Effects 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
- G01F1/662—Constructional details
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- Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention provides an ultrasonic flue gas flowmeter, which skillfully improves the structure of the flue gas flowmeter: the ultrasonic wave transmitting and receiving device comprises a controller, a first ultrasonic wave transmitting and receiving sensor and a second ultrasonic wave transmitting and receiving sensor at an interval L, and only simple function expansion is needed based on the structure. Meanwhile, the connecting rod provided with the first ultrasonic transmitting and receiving sensor and the second ultrasonic transmitting and receiving sensor is hinged with the fixed part, so that the connecting rod can rotate relative to the fixed part. In the actual use, after the fixed part is inserted into the monitoring hole, under the effect of gravity, the detection device is vertically downward and is parallel to the flow direction of the smoke. According to the calculation result of the trigonometric function equation, the component values of the ultrasonic flowmeter are slightly influenced by the error angle near the parallel angle of 0 degree (180 degrees), the error value of the angle error of 8 degrees is less than 1 percent, under the condition, the mounting full angle error of 16 degrees at the maximum can be allowed, the influence of the mounting error of the ultrasonic flowmeter is small, and the measurement accuracy is ensured.
Description
Technical Field
The invention relates to the field of detection equipment, in particular to an ultrasonic flue gas flowmeter.
Background
Accurate detection of emissions of gases, particulate matters and the like is a problem that much attention is paid to by many regulatory authorities, and at present, most of them are applied to automatic flue gas Monitoring systems (CEMS) of thermal power plants and power plants, and the difficulties and problems faced in the flow measurement process are many: high temperature, high dust, high moisture, strong negative pressure and corrosivity, etc.; the operating conditions are typically: the temperature of a smoke medium is about 150 ℃, the primary air or secondary air of a thermal power plant is generally about 200 ℃, and the temperature of the primary air or the secondary air is about 400 ℃ respectively, and the existing method for measuring the flow mainly comprises the following steps: pitot tube pressure differential method: the flow is calculated by measuring the pressure difference, the speed measuring tube is placed at the central position in the flue during measurement, the direction of the tube opening is vertical to the flow direction of flue gas, the difference between dynamic pressure and static pressure at the position is measured, and therefore the flow at the point is calculated.
Fluid thermal deformation method: when the fluid flows through the heating object, the heat loss of the heating object is in a certain proportional relation with the flow of the fluid, and the flow is calculated according to the proportional relation and the heat loss. The two measurement modes have the problems of poor measurement precision and more complicated realization.
In practical application, the installation of the ultrasonic flue gas flowmeter must be fixed by combining the existing working condition. At present, most monitoring holes of a chimney (flue) are designed vertically, and the structure of the existing flue gas flowmeter is difficult to measure the flow of flue gas conveniently, quickly and accurately.
Disclosure of Invention
In view of the above, the technical problem to be solved by the present invention is to overcome the defects of the prior art, and to provide an ultrasonic flue gas flowmeter, which includes a fixing component; the fixed part is connected with a controller and a detection device; the detection device comprises a connecting rod and a first ultrasonic transmitting and receiving sensor and a second ultrasonic transmitting and receiving sensor 133 which are arranged on the connecting rod at intervals; the connecting rod is hinged with the fixed part; the distance between the first ultrasonic transmitting and receiving sensor and the second ultrasonic transmitting and receiving sensor is L; the first ultrasonic transmitting and receiving sensor and the second ultrasonic transmitting and receiving sensor 133 are provided with probes; the probe of the first ultrasonic transmitting and receiving sensor is arranged opposite to the probe of the second ultrasonic transmitting and receiving sensor; the controller is used for controlling the first ultrasonic transmitting and receiving sensor and the second ultrasonic transmitting and receiving sensor to transmit ultrasonic waves, recording the time point of transmitting the ultrasonic waves, and recording the time point of receiving the ultrasonic waves by the first ultrasonic transmitting and receiving sensor and the second ultrasonic transmitting and receiving sensor.
In some embodiments, the fixing member is provided with a housing cavity; and transducer signal wires connected with the first ultrasonic transmitting and receiving sensor, the second ultrasonic transmitting and receiving sensor and the controller are arranged in the accommodating cavity.
In some embodiments, a push rod is connected to the stationary member; one end of the push rod, which is far away from the fixed part, is connected with an elastic part; one end of the elastic component, which is far away from the fixed component, is connected with a limiting component; one end of the limiting component, which deviates from the elastic component, is abutted against one end of the connecting rod, which faces towards the fixing component.
In some embodiments, the push rod is disposed within the receiving cavity of the stationary component; one end of the fixing part, which is far away from the controller, is provided with a through hole for communicating the accommodating cavity with the outside; the connecting rod extends out of the accommodating cavity; the fixing part is provided with a limiting groove; the limiting groove is used for enabling one end of the push rod, which deviates from the elastic component, to slide, so that the stretching of the limiting component is adjusted.
In some embodiments, the second ultrasonic transmitting and receiving sensor is disposed at an end of the connecting rod facing away from the fixing member.
In some embodiments, the fixing device further comprises a bracket clamped with the fixing component and used for fixing the fixing component.
In certain embodiments, the fixation component is a straight tube.
In some embodiments, the push rod is provided with a wire hole for the transducer signal wire to pass through.
In some embodiments, a temperature measuring device is also included that is connected to the controller.
In certain embodiments, a barometric pressure measurement device is also included that is coupled to the controller.
Compared with the prior art, the ultrasonic flue gas flowmeter provided by the invention has the beneficial effects that:
the ultrasonic flue gas flowmeter provided by the embodiment of the invention is skillfully improved in structure, and comprises a controller, a first ultrasonic transmitting and receiving sensor and a second ultrasonic transmitting and receiving sensor which are arranged at an interval L, and based on the structure, the ultrasonic flue gas flowmeter can be placed in a space of flue gas flow to be detected only by simple function expansion during implementation, so that an included angle alpha is formed between a transmission path for transmitting ultrasonic waves between the first ultrasonic transmitting and receiving sensor and the second ultrasonic transmitting and receiving sensor and the flue gas flowing direction in the space of the flue gas flow to be detected, and the flue gas flow in the space of the flue gas flow to be detected can be obtained by calculating the time for transmitting in the same interval according to the downstream direction and the upstream direction of the ultrasonic waves. Meanwhile, the connecting rod provided with the first ultrasonic transmitting and receiving sensor and the second ultrasonic transmitting and receiving sensor is hinged with the fixed part, so that the connecting rod can rotate relative to the fixed part. In the actual use, after the fixed part inserts the monitoring hole, under the effect of gravity, then detection device surveyed perpendicularly downwards, and it is parallel with the flue gas flow direction maintenance. Due to structure and installation errors, the first ultrasonic wave transmitting and receiving sensor and the second ultrasonic wave transmitting and receiving sensor generate installation error angles with the smoke flow direction, and the measurement value of the ultrasonic smoke flowmeter is only the component value of the actual smoke flow velocity value in the smoke flow direction. According to the calculation result of the trigonometric function equation, the component values of the ultrasonic smoke flowmeter are less influenced by the error angle near the parallel angle of 0 degree (180 degrees), the error value of the angle error of 8 degrees is less than 1 percent, under the condition, the maximum mounting full-angle error of 16 degrees can be allowed, the influence of the mounting error of the ultrasonic smoke flowmeter is small, and the measurement precision is ensured. In addition, in actual conditions, most of monitoring holes are formed perpendicular to the flue, and the ultrasonic flue gas flowmeter is designed to be installed and fixed by utilizing the existing conditions in consideration of installation. The fixing member can be freely vertically inserted into or removed from the monitoring hole. Compared with the measuring method in the prior art, the measuring method has the advantages of simple structure, convenience in implementation and higher accuracy, combines actual installation conditions, and reduces operation requirements.
Further, the fixed part is connected with a push rod; one end of the push rod, which is far away from the fixed part, is connected with an elastic part; one end of the elastic component, which is far away from the fixed component, is connected with a limiting component; one end of the limiting component, which is far away from the elastic component, is abutted against one end of the connecting rod, which is far towards the fixing component. When this kind of structure made detection device perpendicularly downwards, the push rod pushed forward under the spring force effect to the tight detection device in top guarantees that detection device can not rock because of the influence production of flue gas flow in the measurement process.
Further, the push rod can be arranged in the accommodating cavity of the fixing part; the limit groove formed in the fixing part slides the push rod, so that the stretching of the limit part is adjusted, the push rod is pushed forwards under the action of spring force, the detection device is tightly pushed, and the detection device is guaranteed not to shake due to the flowing influence of smoke in the measurement process.
Further, still include with temperature measuring device and the pressure measurement device that the controller is connected have richened ultrasonic wave flue gas flowmeter's function.
In summary, the special structure of the present invention has the advantages and practical values, and similar methods are not disclosed or used in the similar products, so that the present invention is innovative, has a practical and practical effect, and has a plurality of enhanced effects compared with the existing flue gas flow meter, thereby being practical and having a wide industrial value.
The details are described below with reference to the accompanying drawings.
Drawings
It is to be understood that the following drawings illustrate only certain embodiments of this invention and are therefore not to be considered limiting of its scope, for those skilled in the art to which it pertains without inventive faculty, and that other related drawings may be derived therefrom.
FIG. 1 is a cross-sectional view of an ultrasonic flue gas flow meter of the present invention;
FIG. 2 is a cross-sectional view of the ultrasonic flue gas flow meter of the present invention;
fig. 3 is a schematic structural diagram of the ultrasonic flue gas flowmeter of the present invention.
The reference numbers illustrate:
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Examples
The embodiment of the invention provides an ultrasonic flue gas flowmeter 1, which comprises a fixing part 11; the fixed part 11 is connected with a controller and a detection device 13; the detecting device 13 comprises a connecting rod 131 and a first ultrasonic transmitting and receiving sensor 132 and a second ultrasonic transmitting and receiving sensor 133 which are arranged on the connecting rod 131 at intervals; the connecting rod 131 is hinged with the fixed part 11; the distance between the first ultrasonic transmitting and receiving sensor 132 and the second ultrasonic transmitting and receiving sensor is L; the first ultrasonic transmitting and receiving sensor 132 and the second ultrasonic transmitting and receiving sensor 133 are both provided with a probe 134; the probe 134 of the first ultrasonic transmitting and receiving transducer 132 is arranged opposite to the probe 134 of the second ultrasonic transmitting and receiving transducer; the controller is configured to control the first ultrasonic transmitting and receiving sensor 132 and the second ultrasonic transmitting and receiving sensor to transmit ultrasonic waves, record a time point of transmitting the ultrasonic waves, and record a time point of receiving the ultrasonic waves by the first ultrasonic transmitting and receiving sensor 132 and the second ultrasonic transmitting and receiving sensor 133.
Above-mentioned, can understand, this ultrasonic wave flue gas flowmeter 1 includes the first ultrasonic wave launch and receive sensor 132 and the second ultrasonic wave launch and receive sensor 133 of controller, interval L, based on this structure, when implementing, only need carry out simple function extension, alright place ultrasonic wave flue gas flowmeter 1 in waiting to detect the space of flue gas flow for the transmission route of transmission ultrasonic wave between first ultrasonic wave launch and receive sensor 132 and the second ultrasonic wave launch and receive sensor 133 with flue gas flow direction in waiting to detect the space of flue gas flow becomes contained angle alpha, alright according to ultrasonic wave following current direction, the flue gas flow in the flue gas flow space that waits to detect is calculated to the time that the transmission takes in the same interval to obtain. Meanwhile, since the link 131 provided with the first ultrasonic transmission/reception sensor 132 and the second ultrasonic transmission/reception sensor is hinged to the fixed member 11, the link 131 can be rotated with respect to the fixed member 11. In the actual use, after the fixed part 11 is inserted into the monitoring hole, the detection device 13 vertically detects downwards under the action of gravity, so that the detection device 13 is prevented from touching the wall of a chimney (flue). After the flow of the flue gas is monitored, when the fixing part 11 is taken out of the monitoring hole, the detection device 13 can stretch and directly exit from the monitoring hole. Compared with the measuring method in the prior art, the measuring method has the advantages of simple structure, convenience in implementation and higher accuracy, and meets the actual requirements.
It will be appreciated that the insertion into the flue is maintained parallel to the direction of flow of the flue gases. Due to the structure and installation errors, the first ultrasonic transmitting and receiving sensor 132 and the second ultrasonic transmitting and receiving sensor 133 generate installation error angles with the flow direction of the flue gas, and the measured value of the ultrasonic flowmeter 1 is only the component value of the actual flow velocity value of the flue gas in the flow direction of the flue gas. According to the calculation result of the trigonometric function equation, the component values of the ultrasonic flowmeter are less influenced by the error angle near the parallel angle of 0 degree (180 degrees), the error value of the angle error of 8 degrees is less than 1 percent, under the condition, the maximum mounting full-angle error of 16 degrees can be allowed, the influence of the mounting error of the ultrasonic flowmeter 1 is small, and the measurement precision is ensured. In addition, in actual conditions, most of monitoring holes are formed perpendicular to the flue, and the ultrasonic flowmeter 1 is designed to be fixed by utilizing the existing conditions during installation. The fixing member can be freely inserted or removed vertically from the monitoring hole. Compared with the measuring method in the prior art, the measuring method has the advantages of simple structure, convenience in implementation and higher accuracy, combines actual installation conditions, and reduces operation requirements.
In the embodiment of the present invention, the fixing component 11 is provided with an accommodating cavity 111; the accommodating cavity 111 is internally provided with a transducer signal line 14 connected with the first ultrasonic transmitting and receiving sensor 132, the second ultrasonic transmitting and receiving sensor and the controller.
Above, it will be appreciated that the transducer signal wire 14 is preferably a high temperature titanium alloy transducing wire. Titanium alloys are alloys based on titanium with other elements added. Titanium has two homogeneous heterocrystals: titanium is an allotropic isomer, has a melting point of 1668 ℃, and has a close-packed hexagonal lattice structure at a temperature lower than 882 ℃, and is called as alpha-titanium; it has a body-centered cubic lattice structure at over 882 deg.C and is called beta-titanium. By utilizing the different characteristics of the two structures of titanium and adding proper alloy elements, the phase transition temperature and the component content of the titanium alloy are gradually changed to obtain titanium alloys (titanium alloys) with different tissues, and the titanium alloy transduction line has a good high-temperature resistant effect.
It will be appreciated that the transducer signal wires 14 are preferably wrapped with teflon tubing and then introduced into the control box through the push rod 15.
In the embodiment of the present invention, a push rod 15 is connected to the fixing member 11; one end of the push rod 15, which is far away from the fixed part 11, is connected with an elastic part 16; one end of the elastic component 16, which is far away from the fixed component 11, is connected with a limiting component 17; one end of the limiting component 17, which is far away from the elastic component 16, is abutted with one end of the connecting rod 131, which is far towards the fixed component 11.
The fixing component 11 is connected with a push rod 15; one end of the push rod 15, which is far away from the fixed part 11, is connected with an elastic part 16; one end of the elastic component 16 departing from the fixed component 11 is connected with a limiting component 17; one end of the limiting component 17, which is far away from the elastic component 16, is abutted with one end of the connecting rod 131, which is far towards the fixing component 11. When this kind of structure made detecting device 13 perpendicularly downwards, push rod 15 pushed forward under the spring force effect to top detecting device 13, guarantee that detecting device 13 can not rock because of the influence production of flue gas flow in the measurement process.
In the embodiment of the present invention, the push rod 15 is disposed in the accommodating cavity 111 of the fixing component 11; a through hole 112 for communicating the accommodating cavity 111 with the outside is formed at one end of the fixing part 11, which is away from the controller; the connecting rod 131 extends out of the accommodating cavity 111; the fixing part 11 is provided with a limit groove 113; the limiting groove 113 is used for sliding one end of the push rod 15 departing from the elastic component 16, so as to adjust the extension and retraction of the limiting component 17.
The push rod 15 can be placed in the accommodating cavity 111 of the fixing component 11; the push rod 15 slides through the limit groove 113 formed in the fixing part 11, so that the expansion of the limit part 17 is adjusted, the push rod 15 is pushed forwards under the action of spring force, the detection device 13 is tightly pushed, and the detection device 13 is guaranteed not to shake due to the influence of smoke flowing in the measurement process.
In the embodiment of the present invention, the second ultrasonic transmission and reception sensor is disposed at an end of the connecting rod 131 facing away from the fixing member 11.
In the embodiment of the present invention, a bracket 18 is further included, which is engaged with the fixing component 11 and is used for fixing the fixing component 11.
Above, it will be appreciated that the bracket 18 is preferably a fixed flange.
In the present embodiment, the fixing member 11 is a straight pipe.
In the embodiment of the present invention, the push rod 15 is provided with a wire hole for the transducer signal wire 14 to pass through.
Above-mentioned, the line hole that supplies transducer signal line 14 to wear to establish is seted up to push rod 15, and transducer signal line 14 is difficult for appearing breaking over and twining.
In the embodiment of the present invention, a temperature measuring device 19a connected to the controller is further included.
In the embodiment of the present invention, an air pressure measuring device 19b connected to the controller is further included.
Above-mentioned, ultrasonic wave flue gas flowmeter 1 still include with temperature measuring device 19a and air pressure measuring device 19b that the controller is connected have richened ultrasonic wave flue gas flowmeter 1's function.
It will be apparent to those skilled in the art that the functions of the embodiments of the present invention described above may be implemented by a general purpose computing device, which may be centralized on a single computing device or distributed across a network of computing devices, or alternatively, may be implemented by existing program code that is executable by a computing device, such that it may be stored in a memory device and executed by a computing device, or fabricated separately as individual integrated circuit modules, or fabricated as a single integrated circuit module from multiple modules or steps. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. Ultrasonic wave flue gas flowmeter, its characterized in that: comprises a fixed part; the fixed part is connected with a controller and a detection device; the detection device comprises a connecting rod, a first ultrasonic transmitting and receiving sensor and a second ultrasonic transmitting and receiving sensor which are arranged on the connecting rod at intervals; the connecting rod is hinged with the fixed part; the distance between the first ultrasonic transmitting and receiving sensor and the second ultrasonic transmitting and receiving sensor is L; the first ultrasonic transmitting and receiving sensor and the second ultrasonic transmitting and receiving sensor are both provided with probes; the probe of the first ultrasonic transmitting and receiving sensor is arranged opposite to the probe of the second ultrasonic transmitting and receiving sensor; the controller is used for controlling the first ultrasonic transmitting and receiving sensor and the second ultrasonic transmitting and receiving sensor to transmit ultrasonic waves, recording the time point of transmitting the ultrasonic waves and recording the time point of receiving the ultrasonic waves by the first ultrasonic transmitting and receiving sensor and the second ultrasonic transmitting and receiving sensor;
wherein the fixed part is connected with a push rod; one end of the push rod, which is far away from the fixed part, is connected with an elastic part; one end of the elastic component, which is far away from the fixed component, is connected with a limiting component; one end of the limiting component, which is far away from the elastic component, is abutted against one end of the connecting rod, which is far towards the fixing component; when the detection device is vertically downward, the push rod tightly pushes the detection device under the action of the elastic component.
2. The ultrasonic flue gas flow meter of claim 1, wherein: the fixed part is provided with an accommodating cavity; and transducer signal wires connected with the first ultrasonic transmitting and receiving sensor, the second ultrasonic transmitting and receiving sensor and the controller are arranged in the accommodating cavity.
3. The ultrasonic flue gas flow meter of claim 1, wherein: the push rod is arranged in the accommodating cavity of the fixed part; one end of the fixing part, which is far away from the controller, is provided with a through hole for communicating the accommodating cavity with the outside; the connecting rod extends out of the accommodating cavity; the fixing part is provided with a limiting groove; the limiting groove is used for enabling one end of the push rod, which deviates from the elastic component, to slide, so that the stretching of the limiting component is adjusted.
4. The ultrasonic flue gas flow meter of claim 3 wherein: the second ultrasonic transmitting and receiving sensor is arranged at one end of the connecting rod, which is far away from the fixed part.
5. The ultrasonic flue gas flow meter of claim 1 wherein: the fixing part is clamped with the fixing part and used for fixing the fixing part.
6. The ultrasonic flue gas flow meter of claim 2, wherein: the fixing part is a straight pipe.
7. The ultrasonic flue gas flow meter of claim 2, wherein: the push rod is provided with a wire hole for the transducer signal wire to penetrate through.
8. The ultrasonic flue gas flow meter of claim 1, wherein: the temperature measuring device is connected with the controller.
9. The ultrasonic flue gas flow meter of claim 1 wherein: the device also comprises an air pressure measuring device connected with the controller.
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| CN201806779U (en) * | 2010-10-11 | 2011-04-27 | 北京爱康宜诚医疗器材股份有限公司 | Universal screw driver |
| CN102253124A (en) * | 2011-04-21 | 2011-11-23 | 北京航空航天大学 | General fixing device for probe of acoustic emission detection apparatus |
| CN103831337A (en) * | 2014-03-31 | 2014-06-04 | 成都振中电气有限公司 | Tail jacking mechanism of spinning machine |
| CN104977053A (en) * | 2015-07-21 | 2015-10-14 | 深圳西大仪器有限公司 | Flue gas flow meter and flue gas flow detection method |
| CN105698884A (en) * | 2016-03-07 | 2016-06-22 | 上海电气自动化设计研究所有限公司 | Improved measurement method of time difference type ultrasonic flow meter |
| CN206056689U (en) * | 2016-09-07 | 2017-03-29 | 深圳西大仪器有限公司 | Ultrasound wave flue gas flow meter |
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