CN201804022U - Penetrating Ultrasonic Flue Velocity Meter - Google Patents
Penetrating Ultrasonic Flue Velocity Meter Download PDFInfo
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- CN201804022U CN201804022U CN2009202934871U CN200920293487U CN201804022U CN 201804022 U CN201804022 U CN 201804022U CN 2009202934871 U CN2009202934871 U CN 2009202934871U CN 200920293487 U CN200920293487 U CN 200920293487U CN 201804022 U CN201804022 U CN 201804022U
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Abstract
Description
技术领域technical field
本实用新型属于气体流速的测量,特别涉及一种采用超声波来测量烟气流量的超声波烟气流速计量仪,应用在环保监测行业中。 The utility model belongs to the measurement of gas flow velocity, in particular to an ultrasonic flue gas velocity measuring instrument which adopts ultrasonic wave to measure flue gas flow, and is applied in the environmental protection monitoring industry. the
背景技术Background technique
目前大多应用在热力厂和发电厂的CEMS系统中,对于烟气流速的检测方法主要有:测量流体中的压力差的皮托管、测量流体热变量的热式气体流量计等方法。 At present, most of them are used in CEMS systems of thermal power plants and power plants. The detection methods of flue gas flow rate mainly include: Pitot tube for measuring the pressure difference in the fluid, and thermal gas flowmeter for measuring the thermal variable of the fluid. the
皮托管气体流量计的原理为:通过测量压力来测量流速,操作时将测速管放置在烟道内中心位置,使管口与烟气流速方向垂直,测得该位置上的动压与静压之差,从而计算出该点的流速。存在问题:为实现流速的测量,仪表需配备压差变送器,尤其是在小流速(10m/s)的测量,由于皮托管产生的压力很小,故对于低流速的测量,皮托管气体流量计有其自身的弊端:精度差,不能测低速烟气,经常堵塞。 The principle of the Pitot tube gas flowmeter is: to measure the flow rate by measuring the pressure. During operation, place the velocity measuring tube at the center of the flue, make the nozzle perpendicular to the flow direction of the flue gas, and measure the relationship between the dynamic pressure and the static pressure at this position. difference, so as to calculate the flow velocity at this point. Existing problems: In order to realize the measurement of flow rate, the instrument needs to be equipped with a differential pressure transmitter, especially in the measurement of small flow rate (10m/s), because the pressure generated by the pitot tube is very small, so for the measurement of low flow rate, the pitot tube gas The flow meter has its own disadvantages: poor accuracy, unable to measure low-speed flue gas, and often blocked. the
热式气体流量计的原理为:利用热传导原理检测流量,即通过流动中的流体与热源之间热量交换关系来测量流量。从加热功率与热源的温度差的比值可以得出质量流量Q。存在问题:热式气体流量计的响应速度相对较长。 The principle of the thermal gas flowmeter is to use the principle of heat conduction to detect the flow rate, that is, to measure the flow rate through the heat exchange relationship between the flowing fluid and the heat source. The mass flow Q can be derived from the ratio of the heating power to the temperature difference of the heat source. Problem: The response speed of the thermal gas flowmeter is relatively long. the
发明内容Contents of the invention
本实用新型的目的是,针对上述流量计的缺点,提出测量横渡一定距离所需时间的方法,涉及将两个超声波收发器分别设置在被测烟气管道的上风侧和下风侧,通过从一个超声波收发器发送超声波到另一超声波收发器接收,再由另一个超声波收发器发送超声波到前者超声波收发器接收所需时间差而测量烟气流量的超声波流量计,以达到测速具有响应快,测量范围广的优点。 The purpose of this utility model is to propose a method for measuring the time required to cross a certain distance in view of the shortcomings of the above-mentioned flowmeter, which involves setting two ultrasonic transceivers on the upwind side and the downwind side of the flue gas pipeline to be measured respectively, through a Ultrasonic transceivers send ultrasonic waves to another ultrasonic transceiver for reception, and then another ultrasonic transceiver sends ultrasonic waves to the former ultrasonic transceiver to receive the time difference required to measure the ultrasonic flow meter of flue gas flow, so as to achieve speed measurement with fast response and wide measurement range. wide advantages. the
本实用新型的技术方案是,一种对穿式超声波烟气流速计量仪,由两个超声波收发器及控制电路构成,两个超声波收发器分别设置在被测烟气管道的上风侧和下风侧,在烟气的通路中形成超声波传播路径,超声波收发器的探头通过导线连接至控制盒内的控制电路,超声波收发器利用自身的法兰与烟气管道上的法兰盘固定在烟道上,保持两个超声波收发器的轴线方向与烟气流速方向成固定角度θ。 The technical scheme of the utility model is that a piercing type ultrasonic flue gas velocity measuring instrument is composed of two ultrasonic transceivers and a control circuit, and the two ultrasonic transceivers are respectively arranged on the upwind side and the downwind side of the measured flue gas pipeline , forming an ultrasonic propagation path in the flue gas passage, the probe of the ultrasonic transceiver is connected to the control circuit in the control box through a wire, and the ultrasonic transceiver is fixed on the flue by its own flange and the flange on the flue gas pipe. Keep the axial directions of the two ultrasonic transceivers at a fixed angle θ with the smoke flow direction. the
控制电路通过产生40kHz的电信号激发超声波收发器产生超声波。 The control circuit excites the ultrasonic transceiver to generate ultrasonic waves by generating 40kHz electrical signals. the
本实用新型的优点是,超声波烟气流速计量仪用于烟道中烟气流量的测量,具有响应快,测量范围广的优点。适用于在烟气流路中形成超声波传播路径,来测量烟气流体流速的超声波烟气流速计量仪。 The utility model has the advantages that the ultrasonic flue gas velocity measuring instrument is used for measuring the flue gas flow in the flue, and has the advantages of fast response and wide measurement range. It is an ultrasonic flue gas flow meter suitable for forming an ultrasonic propagation path in the flue gas flow path to measure the flow rate of the flue gas fluid. the
附图说明Description of drawings
以下结合附图及实施例,对本实用新型作进一步描述。 Below in conjunction with accompanying drawing and embodiment, the utility model is further described. the
图1是本实用新型的对穿式超声波烟气流速计量仪的构造示意图 Fig. 1 is a schematic diagram of the structure of the penetrating ultrasonic flue gas flow meter of the present invention
图中,1-烟道,2-烟气管道上的法兰盘,3-上风超声波收发器,4-上风超声波探头,5-下风超声波探头,6-超声波收发器的法兰,7-控制盒,8-下风超声波收发器 In the figure, 1-flue, 2-flange on the flue gas pipe, 3-upwind ultrasonic transceiver, 4-upwind ultrasonic probe, 5-downwind ultrasonic probe, 6-flange of ultrasonic transceiver, 7-control Box, 8-downwind ultrasonic transceiver
具体实施方式Detailed ways
由图1可见,一种对穿式超声波烟气流速计量仪,由两个超声波收发器及控制电路构成,上风超声波收发器3设置在被测烟气管道的上风侧,下风超声波收发器8设置在被测烟气管道的下风侧,在烟气的通路中形成超声波传播路径,超声波收发器的上风超声波探头4和下风超声波探头5通过导线连接至各自控制盒7内的控制电路,超声波收发器利用自身的法兰6与烟气管道上的法兰盘2固定在烟道上,保持两个超声波收发器的轴线方向与烟气流速方向成固定角度θ。控制电路通过产生40kHz的电信号激发超声波收发器产生超声波。 It can be seen from Fig. 1 that a penetrating ultrasonic flue gas velocity measuring instrument is composed of two ultrasonic transceivers and a control circuit. On the downwind side of the measured flue gas pipeline, an ultrasonic propagation path is formed in the passage of the flue gas, and the upwind ultrasonic probe 4 and the downwind ultrasonic probe 5 of the ultrasonic transceiver are connected to the control circuits in the respective control boxes 7 by wires, and the ultrasonic transceiver Use its own flange 6 and the
本实用新型的使用方法是,两个超声波收发器分别起发送器和接收器的功能,当一方超声波收发器作为发送器使用时,另一方作为接收器使用。两个超声波收发器之间所形成的超声波传播路径与流体的流动方向成θ角。当超声波顺流体流动方向前进,其速度就变快,当超声波沿逆着流体流动方向前进,其速度就变慢。因此,控制电路产生40kHz的电信号激发超声波收发器产生超声波,由控制电路通过软件记录两个超声波收发器收发超声波传输的时间差,可以求出流体的速度。根据通过流路的截面积求出瞬时流量。 The usage method of the utility model is that two ultrasonic transceivers function as a transmitter and a receiver respectively, and when one ultrasonic transceiver is used as a transmitter, the other is used as a receiver. The ultrasonic propagation path formed between the two ultrasonic transceivers forms an angle θ with the flow direction of the fluid. When the ultrasonic wave advances along the direction of fluid flow, its speed becomes faster, and when the ultrasonic wave advances against the direction of fluid flow, its speed becomes slower. Therefore, the control circuit generates a 40kHz electrical signal to excite the ultrasonic transceiver to generate ultrasonic waves, and the control circuit records the time difference between the two ultrasonic transceivers to send and receive ultrasonic transmission through software, and the fluid velocity can be obtained. Calculate the instantaneous flow rate from the cross-sectional area of the flow path. the
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CN2009202934871U CN201804022U (en) | 2009-12-18 | 2009-12-18 | Penetrating Ultrasonic Flue Velocity Meter |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106110454A (en) * | 2016-06-01 | 2016-11-16 | 淮南市宜留机械科技有限公司 | A kind of nebulizer deters plug trustship pedestal |
CN108732379A (en) * | 2017-04-13 | 2018-11-02 | 西克工程有限公司 | Measuring device for the flow velocity for measuring fluid |
-
2009
- 2009-12-18 CN CN2009202934871U patent/CN201804022U/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106110454A (en) * | 2016-06-01 | 2016-11-16 | 淮南市宜留机械科技有限公司 | A kind of nebulizer deters plug trustship pedestal |
CN108732379A (en) * | 2017-04-13 | 2018-11-02 | 西克工程有限公司 | Measuring device for the flow velocity for measuring fluid |
CN108732379B (en) * | 2017-04-13 | 2020-10-02 | 西克工程有限公司 | Measuring device for measuring the flow rate of a fluid |
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Address after: 100085, E, building 6, Ka Wah building, 3rd Street, Beijing, Haidian District Patentee after: China energy saving Tian Rong Technology Co., Ltd. Address before: 100085, E, building 6, Ka Wah building, 3rd Street, Beijing, Haidian District Patentee before: Zhongke Tianrong (Beijing) Technology Co., Ltd. |
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CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20181218 |