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CN111595397A - Measuring pipe body structure for ultrasonic gas meter - Google Patents

Measuring pipe body structure for ultrasonic gas meter Download PDF

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Publication number
CN111595397A
CN111595397A CN202010332755.7A CN202010332755A CN111595397A CN 111595397 A CN111595397 A CN 111595397A CN 202010332755 A CN202010332755 A CN 202010332755A CN 111595397 A CN111595397 A CN 111595397A
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ultrasonic
port
ultrasonic sensor
gas meter
chamber
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彭黎辉
马浩程
曹丽
杉亮一
清水和义
高桥刚
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Tsinghua University
Tokyo Keiso Co Ltd
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Tsinghua University
Tokyo Keiso Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66Measuring 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
    • G01F1/662Constructional details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/18Supports or connecting means for meters
    • G01F15/185Connecting means, e.g. bypass conduits

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  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
  • Electromagnetism (AREA)

Abstract

本发明涉及一种用于超声波气表的测量管体结构,其包括:一第一端口气舱、一第二端口气舱、一直线型测量管、一第一超声波传感器、一第二超声波传感器以及密封螺栓;所述第一超声波传感器和所述第二超声波传感器的中心轴线,与所述直线型测量管的中心轴线重合。本发明通过超声波气表两端设计的端口气舱进行缓冲,保证测量管路内气流稳定;利用直线型测量管路进行测量,流速测量灵敏度高,超声波气表流量测量的准确性好;外形简单,易于加工和装配,并具有良好的密封效果。

Figure 202010332755

The invention relates to a measuring tube structure for an ultrasonic gas meter, which comprises: a first port air chamber, a second port air chamber, a linear measuring tube, a first ultrasonic sensor, and a second ultrasonic sensor and a sealing bolt; the central axes of the first ultrasonic sensor and the second ultrasonic sensor coincide with the central axis of the linear measuring tube. The invention uses the port air chambers designed at both ends of the ultrasonic gas meter for buffering, so as to ensure the stable airflow in the measurement pipeline; using a linear measurement pipeline for measurement, the flow velocity measurement sensitivity is high, and the accuracy of the ultrasonic gas meter flow measurement is good; and the shape is simple. , easy to process and assemble, and has a good sealing effect.

Figure 202010332755

Description

用于超声波气表的测量管体结构Measuring tube structure for ultrasonic gas meters

技术领域technical field

本发明涉及一种用于超声波气表的测量管体结构,属于计量设备技术领域。The invention relates to a measuring tube body structure for an ultrasonic gas meter, and belongs to the technical field of measuring equipment.

背景技术Background technique

近年来,我国天然气行业发展迅速,年消耗量逐年攀升,根据相关数据可以得知,我国天然气消费总量在1994年时为173亿立方米,而到了2010年增加到了1076亿立方米,并且年增长率也很高,截止到2016年,这一数据已经翻了一倍,已经达到了2058亿立方米。虽然近年来天然气的产量和消费增速有所放缓,但是市场依旧非常庞大。此外,随着国家产业能源结构的调整,天然气属于清洁能源,在国家的能源结构中的占比也会逐渐增加,然而我国现有的居民天然气结算方式相对还很老旧,不仅不利于国家数据的统计和资源分配,同时也不方便居民进行天然气资源的使用。In recent years, my country's natural gas industry has developed rapidly, and the annual consumption has been rising year by year. According to relevant data, the total natural gas consumption in my country was 17.3 billion cubic meters in 1994, but increased to 107.6 billion cubic meters in 2010. The growth rate is also high, and as of 2016, this figure has doubled to 205.8 billion cubic meters. Although the growth rate of natural gas production and consumption has slowed down in recent years, the market is still very large. In addition, with the adjustment of the national industrial energy structure, natural gas is a clean energy, and its proportion in the country's energy structure will gradually increase. However, my country's existing residential natural gas settlement method is relatively old, which is not only unfavorable for national data. statistics and resource allocation, and it is also inconvenient for residents to use natural gas resources.

从2005年开始,城市的燃气普及率就逐年提高,到2009年就已经达到了91.4%,“十二五”之后,城市的燃气普及率达到了94%以上,县城的燃气普及率达到了65%以上,用气家庭达到了2亿户。相关数据表明,我国膜式燃气表的市场规模在数千万台左右。Since 2005, the gas penetration rate in cities has been increasing year by year, and reached 91.4% in 2009. After the "Twelfth Five-Year Plan", the gas penetration rate in cities has reached more than 94%, and the gas penetration rate in county towns has reached 65%. % or more, and the number of households using gas has reached 200 million. Relevant data show that the market size of membrane gas meters in my country is about tens of millions.

2016年,上海市已经开始了“水,电,气”的三表集抄,利用原有的电表自动集抄的通道,将不同通信结构的智能水表,气表的数据采集之后,经过电力线载波或短距离无线等方式上传至电力集中器,利用原有的用电信息采集系统将数据传送至后台数据服务器。从而实现广大居民“抄表不进户,付费不出社区”的便利。而全国范围内的三表和四表集抄也将会是未来数字化社会的重要发展方向。由于传统的膜式气表是采用机械结构进行的气体流量的测量,很难进行智能化的集成,因此也需要更加精准、高效、稳定的新一代智能化气表来代替传统的膜式天然气表。In 2016, Shanghai has started the centralized reading of "water, electricity and gas" three meters, using the original automatic meter reading channel, after collecting the data of smart water meters and gas meters with different communication structures, through the power line carrier wave. Or short-distance wireless upload to the power concentrator, and use the original power consumption information collection system to transmit the data to the background data server. In this way, it is convenient for the majority of residents to "do not enter the household for meter reading, and do not pay for the community". The nationwide three-meter and four-meter collection copying will also be an important development direction of the future digital society. Since the traditional membrane gas meter uses a mechanical structure to measure the gas flow, it is difficult to integrate intelligently. Therefore, a more accurate, efficient and stable new generation of intelligent gas meters is needed to replace the traditional membrane gas meters. .

“十三五”时期(2016-2020年)将是我国全面建成小康社会,实现中华民族伟大复兴中国梦的关键时期,能源发展面临前所未有的机遇和挑战,天然气在我国能源革命中占据重要地位。在国家继续深化改革的政策指引下,天然气行业的发展环境将发生显著变化。天然气行业的不断发展与普及将及大的推动智能燃气表的发展。The "13th Five-Year Plan" period (2016-2020) will be a critical period for my country to build a moderately prosperous society in an all-round way and realize the Chinese dream of the great rejuvenation of the Chinese nation. Energy development faces unprecedented opportunities and challenges, and natural gas occupies an important position in my country's energy revolution. Under the guidance of the state's policy of continuing to deepen reforms, the development environment of the natural gas industry will undergo significant changes. The continuous development and popularization of the natural gas industry will greatly promote the development of smart gas meters.

当前,传统智能燃气表在解决燃气客户痛点时存在许多问题,比如数据传输不稳定、功耗高和抄表成功率低等。而以超声波流量测量技术并配备有物联网功能模块的超声波电子式燃气表具有高安全、广覆盖、大连接、低功耗和低成本等特点,可以较好的解决上述问题,并更好的满足燃气客户的发展需求。然而,现有超声波电子式燃气表中燃气流量测量的灵敏度较低。At present, traditional smart gas meters have many problems in solving the pain points of gas customers, such as unstable data transmission, high power consumption and low meter reading success rate. The ultrasonic electronic gas meter with ultrasonic flow measurement technology and equipped with the Internet of Things functional module has the characteristics of high security, wide coverage, large connection, low power consumption and low cost, which can better solve the above problems, and better Meet the development needs of gas customers. However, the sensitivity of gas flow measurement in existing ultrasonic electronic gas meters is low.

发明内容SUMMARY OF THE INVENTION

超声波燃气表的核心技术是对燃气流量的准确测量。本发明的目的是提供一种用于超声波气表的测量管体结构,采用了超声波测量气体流速的方式,可以精确地测量管道内部燃气/天然气/煤气的流速。The core technology of ultrasonic gas meter is the accurate measurement of gas flow. The purpose of the present invention is to provide a measuring tube structure for an ultrasonic gas meter, which can accurately measure the flow rate of gas/natural gas/gas inside the pipeline by adopting the method of measuring the gas flow rate by ultrasonic waves.

一种用于超声波气表的测量管体结构,其包括:一第一端口气舱、一第二端口气舱、一直线型测量管、一第一超声波传感器、一第二超声波传感器以及密封螺栓;所述第一超声波传感器和所述第二超声波传感器的中心轴线,与所述直线型测量管的中心轴线重合。A measuring tube body structure for an ultrasonic gas meter, comprising: a first port air chamber, a second port air chamber, a linear measuring tube, a first ultrasonic sensor, a second ultrasonic sensor and sealing bolts ; The central axes of the first ultrasonic sensor and the second ultrasonic sensor coincide with the central axis of the linear measuring tube.

一种用于超声波气表的测量管体结构,其包括:一第一端口气舱,该第一端口气舱设置一进气口;一第二端口气舱,该第二端口气舱设置一出气口;一直线型测量管;一第一超声波传感器;一第二超声波传感器;以及密封螺栓;所述直线型测量管相对的两端分别插入所述第一端口气舱和所述第二端口气舱;所述第一超声波传感器和所述第二超声波传感器的中心轴线,与所述直线型测量管的中心轴线重合。A measuring tube body structure for an ultrasonic gas meter, comprising: a first port air chamber, the first port air chamber is provided with an air inlet; a second port air chamber, the second port air chamber is provided with a air outlet; a straight measuring tube; a first ultrasonic sensor; a second ultrasonic sensor; and a sealing bolt; the opposite ends of the straight measuring tube are respectively inserted into the first port air chamber and the second end a tone chamber; the central axes of the first ultrasonic sensor and the second ultrasonic sensor coincide with the central axis of the linear measuring tube.

与现有技术相比,本发明提供的用于超声波气表的测量管体结构中,第一超声波传感器、第二超声波传感器的中心轴线与直线型测量管的中心轴线重合,直线型测量段距离较长,超声波在气流中传播的距离也较长,可以显著提高流速测量灵敏度,并可以降低可测最小流量和测量死区。Compared with the prior art, in the measuring tube structure for an ultrasonic gas meter provided by the present invention, the central axes of the first ultrasonic sensor and the second ultrasonic sensor coincide with the central axis of the linear measuring tube, and the distance between the linear measuring sections is Longer, the ultrasonic wave travels in the airflow for a longer distance, which can significantly improve the flow velocity measurement sensitivity, and can reduce the measurable minimum flow rate and measurement dead zone.

附图说明Description of drawings

图1是本发明提出的用于超声波气表的测量管体结构的结构示意图。FIG. 1 is a schematic structural diagram of a measuring tube structure for an ultrasonic gas meter proposed by the present invention.

图2是图1所示的用于超声波气表的测量管体结构的渲染图。FIG. 2 is a rendering diagram of the structure of the measuring tube for the ultrasonic gas meter shown in FIG. 1 .

图3是图1所示的用于超声波气表的测量管体结构的正视剖面图。FIG. 3 is a front sectional view of the measuring tube structure for the ultrasonic gas meter shown in FIG. 1 .

图4是图1所示的用于超声波气表的测量管体结构的标准三视图。FIG. 4 is a standard three view of the structure of the measuring tube body for the ultrasonic gas meter shown in FIG. 1 .

图5是本发明提出的超声波气表的测量原理示意图。FIG. 5 is a schematic diagram of the measurement principle of the ultrasonic gas meter proposed by the present invention.

图6是基于图1所示的用于超声波气表的测量管体结构的两块气表实际测试的误差结果。FIG. 6 is the error result of the actual test of two gas meters based on the measuring tube structure of the ultrasonic gas meter shown in FIG. 1 .

主要元件符号说明Description of main component symbols

测量管体结构 10Measuring Tube Structure 10

第一端口气舱 12First port air chamber 12

进气口 122Air intake 122

第一通孔 124first through hole 124

第二通孔 126second through hole 126

第二端口气舱 142nd port air chamber 14

出气口 142Air outlet 142

第三通孔 144third through hole 144

第四通孔 146Fourth through hole 146

直线型测量管 16Straight measuring tube 16

第一端 162first end 162

第二端 164second end 164

第一超声波传感器 11first ultrasonic sensor 11

第二超声波传感器 13Second ultrasonic sensor 13

密封螺栓 18sealing bolt 18

出线孔 182Outlet hole 182

圆盘 15Disc 15

通孔 152Through hole 152

如下具体实施方式将结合上述附图进一步说明本发明。The following specific embodiments will further illustrate the present invention in conjunction with the above drawings.

具体实施方式Detailed ways

下面将结合附图及具体实施例对本发明提供的用于超声波气表的测量管体结构作进一步的详细说明。The structure of the measuring tube body for the ultrasonic gas meter provided by the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

请参见图1至图4,本发明提供的超声波气表的测量管体结构10包括一第一端口气舱12、一第二端口气舱14、一直线型测量管16、一第一超声波传感器11、一第二超声波传感器13和两个密封螺栓18。Referring to FIGS. 1 to 4 , the measuring tube structure 10 of the ultrasonic gas meter provided by the present invention includes a first port air chamber 12 , a second port air chamber 14 , a linear measuring tube 16 , and a first ultrasonic sensor 11. A second ultrasonic sensor 13 and two sealing bolts 18.

所述第一端口气舱12具有一进气口122、一第一通孔124和一第二通孔126。所述进气口122为整个测量管体结构10的进气口122。所述第二端口气舱14具有一出气口142、一第三通孔144和一第四通孔146。所述出气口142为整个测量管体结构10的出气口142。优选的,所述进气口122和出气口142位于直线型测量管16的同侧。本实施例中,所述进气口122和出气口142位于直线型测量管16的上侧。The first port air chamber 12 has an air inlet 122 , a first through hole 124 and a second through hole 126 . The air inlet 122 is the air inlet 122 of the entire measuring tube structure 10 . The second port air chamber 14 has an air outlet 142 , a third through hole 144 and a fourth through hole 146 . The air outlet 142 is the air outlet 142 of the entire measuring tube structure 10 . Preferably, the air inlet 122 and the air outlet 142 are located on the same side of the linear measuring tube 16 . In this embodiment, the air inlet 122 and the air outlet 142 are located on the upper side of the linear measuring tube 16 .

所述直线型测量管16是一中空的管状结构,包括第一端162和与第一端162相对的第二端164。所述第一端口气舱12与直线型测量管16的第一端162连接,所述第二端口气舱14与直线型测量管16的第二端164连接。所述第一端口气舱12和第二端口气舱14对称设置在所述直线型测量管16相对的两端。具体的,所述直线型测量管16的第一端162设置在所述第一端口气舱12的第二通孔126处,直线型测量管16的第二端164设置在所述第二端口气舱14的第三通孔144处。本实施例中,所述直线型测量管16的第一端162从第一端口气舱12的第二通孔126插入第一端口气舱12中,所述直线型测量管16的第二端164从第二端口气舱14的第三通孔144插入第二端口气舱14中。所述第一端口气舱12和第二端口气舱14通过密封圈或密封胶与所述直线型测量管16密封连接,并使用螺栓或钢箍固定。优选的,所述第一端162和第二端164呈喇叭口形状。The linear measuring tube 16 is a hollow tubular structure including a first end 162 and a second end 164 opposite to the first end 162 . The first port air chamber 12 is connected to the first end 162 of the straight measuring tube 16 , and the second port air chamber 14 is connected to the second end 164 of the straight measuring tube 16 . The first port air chamber 12 and the second port air chamber 14 are symmetrically arranged at opposite ends of the linear measuring tube 16 . Specifically, the first end 162 of the straight measuring tube 16 is disposed at the second through hole 126 of the first port air chamber 12 , and the second end 164 of the straight measuring tube 16 is disposed at the second end At the third through hole 144 of the tone chamber 14 . In this embodiment, the first end 162 of the straight measuring tube 16 is inserted into the first port air chamber 12 from the second through hole 126 of the first port air chamber 12 , and the second end of the straight measuring tube 16 is inserted into the first port air chamber 12 . 164 is inserted into the second port air chamber 14 from the third through hole 144 of the second port air chamber 14 . The first port air chamber 12 and the second port air chamber 14 are sealed and connected to the linear measuring tube 16 through a sealing ring or sealant, and are fixed by bolts or steel hoop. Preferably, the first end 162 and the second end 164 are in the shape of a bell mouth.

所述第一超声波传感器11设置在第一端口气舱12远离所述直线型测量管16的一侧,所述第二超声波传感器13设置在第二端口气舱14远离所述直线型测量管16的一侧。具体的,所述第一超声波传感器11设置在第一端口气舱12的第一通孔124处,所述第二超声波传感器13设置在第二端口气舱14的第四通孔146处,并且第一超声波传感器11、第二超声波传感器13的中心轴线与所述直线型测量管16的中心轴线重合。也即,第一超声波传感器11和第二超声波传感器13的中心轴线与所述直线型测量管16的中心轴线形成的角度为零。所述第一超声波传感器11和所述第二超声波传感器13对称地设置在所述直线型测量管16相对的两端,但并未与所述直线型测量管16相对的两端(第一端162和第二端164)直接接触。本实施例中,第一超声波传感器11和第二超声波传感器13的中心轴线与所述直线型测量管16的中心轴线平行且重合。The first ultrasonic sensor 11 is arranged on the side of the first port air chamber 12 away from the linear measuring tube 16 , and the second ultrasonic sensor 13 is arranged at the second port air chamber 14 away from the linear measuring tube 16 . side. Specifically, the first ultrasonic sensor 11 is disposed at the first through hole 124 of the first port air chamber 12 , the second ultrasonic sensor 13 is disposed at the fourth through hole 146 of the second port air chamber 14 , and The central axes of the first ultrasonic sensor 11 and the second ultrasonic sensor 13 coincide with the central axis of the linear measuring tube 16 . That is, the angle formed by the central axis of the first ultrasonic sensor 11 and the second ultrasonic sensor 13 and the central axis of the linear measuring tube 16 is zero. The first ultrasonic sensor 11 and the second ultrasonic sensor 13 are symmetrically arranged at opposite ends of the straight measuring tube 16, but not at the opposite ends of the straight measuring tube 16 (the first end). 162 and the second end 164) are in direct contact. In this embodiment, the central axes of the first ultrasonic sensor 11 and the second ultrasonic sensor 13 are parallel to and coincide with the central axis of the linear measuring tube 16 .

所述第一超声波传感器11远离第一端口气舱12的一侧设有密封螺栓18,所述第二超声波传感器13远离第二端口气舱14的一侧设有密封螺栓18。所述密封螺栓18的中心留有出线孔182,以便第一超声波传感器11和第二超声波传感器13的导线穿过所述出线孔182与外电路连接。The side of the first ultrasonic sensor 11 away from the first port air chamber 12 is provided with a sealing bolt 18 , and the side of the second ultrasonic sensor 13 away from the second port air chamber 14 is provided with a sealing bolt 18 . A wire outlet hole 182 is left in the center of the sealing bolt 18 , so that the wires of the first ultrasonic sensor 11 and the second ultrasonic sensor 13 can pass through the wire outlet hole 182 to be connected to an external circuit.

进一步,所述用于超声波气表的测量管体结构10还可以包括一圆盘15,该圆盘15具有一通孔152,所述直线型测量管16穿过所述圆盘15的通孔152,分别插入所述第一端口气舱12和第二端口气舱14。所述圆盘15设置在第一端口气舱12和第二端口气舱14的之间,用于与第一端口气舱12和第二端口气舱14连接,还可以使用密封圈或密封胶实现密封,使用螺栓或钢箍进行固定。Further, the measuring tube structure 10 for an ultrasonic gas meter may further include a disc 15 having a through hole 152 , and the linear measuring tube 16 passes through the through hole 152 of the disc 15 , respectively inserted into the first port air chamber 12 and the second port air chamber 14 . The disc 15 is arranged between the first port air chamber 12 and the second port air chamber 14, and is used to connect with the first port air chamber 12 and the second port air chamber 14, and a sealing ring or sealant can also be used. To achieve a seal, secure with bolts or steel hoops.

也即,所述用于超声波气表的测量管体结构10的主体结构分为左中右三个部分。左、右两部分对称安装,其上部分别留有进气口122和出气口142,内部为空心气舱。所述左、右部分均是端口气舱,中间部分为圆盘15和直线型测量段(直线型测量管16)。圆盘15用于与左、右部分的端口气舱连接,可以使用密封圈或密封胶实现密封,使用螺栓或钢箍进行固定。直线型测量段的两端分别插入左、右两个端口气舱中,直线型测量段两端的喇叭口结构起到稳定气流的作用。超声波传感器安装在所述主体结构的左右两侧,使用密封螺栓18进行固定,密封螺栓18上留有出线孔182,供超声波传感器的导线穿出。所述左部分(第一端口气舱12)、右部分(第二端口气舱14)与中间部分(直线型测量管16)通过密封圈或者密封胶密封连接,并使用螺栓或钢箍固定。That is, the main structure of the measuring tube structure 10 for an ultrasonic gas meter is divided into three parts: left, middle and right. The left and right parts are installed symmetrically, and the upper part has an air inlet 122 and an air outlet 142 respectively, and the interior is a hollow air chamber. The left and right parts are both port air chambers, and the middle part is the disc 15 and the linear measurement section (linear measurement tube 16 ). The disc 15 is used to connect with the port air chambers of the left and right parts, which can be sealed with a sealing ring or sealant, and fixed with bolts or steel hoops. The two ends of the straight measuring section are inserted into the left and right port air chambers respectively, and the bell mouth structure at both ends of the straight measuring section plays the role of stabilizing the airflow. The ultrasonic sensors are installed on the left and right sides of the main structure, and are fixed with sealing bolts 18. The sealing bolts 18 are provided with wire outlet holes 182 for the wires of the ultrasonic sensor to pass out. The left part (the first port air chamber 12 ), the right part (the second port air chamber 14 ) and the middle part (the linear measuring tube 16 ) are sealedly connected by sealing rings or sealants, and fixed by bolts or steel hoop.

请参见图5,所述用于超声波气表的测量管体结构10在使用时,气流从所述进气口122流入第一端口气舱12,在第一端口气舱12中减速,然后从直线型测量管16的第一端162流入直线型测量管16中,流经测量段(直线型测量管16)后,从直线型测量管16的第二端164流出,并进入第二端口气舱14,最后从所述出气口142排出。Referring to FIG. 5 , when the measuring tube structure 10 for an ultrasonic gas meter is in use, the airflow flows into the first port air chamber 12 from the air inlet 122 , decelerates in the first port air chamber 12 , and then flows from the air inlet 122 to the first port air chamber 12 . The first end 162 of the straight measuring tube 16 flows into the straight measuring tube 16, flows through the measuring section (the straight measuring tube 16), flows out from the second end 164 of the straight measuring tube 16, and enters the second port gas. The cabin 14 is finally discharged from the air outlet 142 .

本发明采用所述用于超声波气表的测量管体结构10以及超声波时差法测量原理测量气体流速,并进而计算气体流量。气体的流动会导致第一超声波传感器11和第二超声波传感器13接收到的对方的超声信号的时间不同,该时间差的大小与气体流速成正相关。根据该原理即可测量出所述测量管体结构10内部的气体流速。所述超声波气表的种类不限,比如可以为超声波燃气表。本实施例中,所述超声波气表为超声波燃气表。The present invention adopts the measuring tube structure 10 for an ultrasonic gas meter and the measurement principle of the ultrasonic time difference method to measure the gas flow rate, and then calculate the gas flow rate. The flow of gas causes the time difference between the ultrasonic signals received by the first ultrasonic sensor 11 and the second ultrasonic sensor 13 from each other, and the time difference is positively related to the gas flow rate. According to this principle, the gas flow rate inside the measuring tube structure 10 can be measured. The type of the ultrasonic gas meter is not limited, for example, it can be an ultrasonic gas meter. In this embodiment, the ultrasonic gas meter is an ultrasonic gas meter.

图6给出了基于所述测量管体结构10的两个超声波燃气表的实际测试的误差结果,由图6可知,所述两个燃气表的测量精度达标。因此,实验证明所述用于超声波气表的测量管体结构10能够优化流体稳定性,减小测量误差。FIG. 6 shows the error results of the actual test of the two ultrasonic gas meters based on the measuring tube structure 10 . It can be seen from FIG. 6 that the measurement accuracy of the two gas meters meets the standard. Therefore, experiments have proved that the measuring tube structure 10 for an ultrasonic gas meter can optimize the fluid stability and reduce the measurement error.

进一步,直线型测量管16的直径越小,其节流效应越明显,即流经直线型测量管16的气体流速随其管径的减小而增大,同时超声波气表的测量管体结构10的压力损失随直线型测量管16的管径的减小而增大。因此,在满足国家标准规定的压力损失的指标下(即小于国家标准规定的压力损失),可以尽量减小直线型测量管16的直径,使得气体在直线型测量管16内的流速尽可能大,从而提高流速的检测灵敏度并改善最小流量检测下限。因此,可以通过减小直线型测量管16的直径的方式,进一步提高流速的检测灵敏度并降低最小流量检测下限。Further, the smaller the diameter of the linear measuring tube 16 is, the more obvious the throttling effect is, that is, the gas flow rate flowing through the linear measuring tube 16 increases with the decrease of its diameter, and the measuring tube body structure of the ultrasonic gas meter is at the same time. The pressure loss at 10 increases as the diameter of the straight measuring tube 16 decreases. Therefore, under the pressure loss index specified by the national standard (that is, less than the pressure loss specified by the national standard), the diameter of the linear measuring tube 16 can be reduced as much as possible, so that the flow velocity of the gas in the linear measuring tube 16 is as large as possible. , thereby increasing the detection sensitivity of the flow rate and improving the detection limit of the minimum flow rate. Therefore, the detection sensitivity of the flow velocity can be further improved and the detection lower limit of the minimum flow rate can be lowered by reducing the diameter of the linear measuring tube 16 .

所述用于超声波气表的测量管体结构10具有以下优点:第一、所述第一超声波传感器11、第二超声波传感器13的中心轴线与直线型测量管16的中心轴线重合,直线型测量段距离较长,因此超声波在气流中传播的距离也较长,可以显著提高流速测量灵敏度、降低可测最小流量、降低测量死区;第二、第一端口气舱12和第二端口气舱14分别位于直线型测量管16的两端,直线型测量管16两端的端口气舱对气流起到了较好的缓冲和稳流效果,使得测量管道内流场稳定,也可以控制测量噪声;第三、可以优化流体稳定性,减小测量误差;第四、外形简单,易于加工和装配,并具有良好的密封效果;第五、可以通过减小直线型测量管16的直径的方式,进一步提高流速的检测灵敏度以及降低最小流量的检测下限;第六、由于所述测量管体结构10为对称结构,也即第一端口气舱12和第二端口气舱14对称设置,第一超声波传感器11和第二超声波传感器13对称设置,两个密封螺栓18也对称设置,可以将两个端口气舱、两个超声波传感器、两个密封螺栓和所述直线型测量管16组装成为所述测量管体结构10,因此,制备方法简单,便于批量化生产。The measuring tube structure 10 for an ultrasonic gas meter has the following advantages: first, the central axes of the first ultrasonic sensor 11 and the second ultrasonic sensor 13 coincide with the central axis of the linear measuring tube 16, and the linear measurement The segment distance is longer, so the ultrasonic wave travels in the airflow for a longer distance, which can significantly improve the sensitivity of flow velocity measurement, reduce the minimum measurable flow rate, and reduce the measurement dead zone; the second and first port air chambers 12 and the second port air chamber 14 are respectively located at both ends of the linear measuring tube 16. The port air chambers at both ends of the linear measuring tube 16 have a good buffering and stabilizing effect on the airflow, which makes the flow field in the measuring pipeline stable and can also control the measurement noise; 3. The fluid stability can be optimized and the measurement error can be reduced; 4. The shape is simple, easy to process and assemble, and has a good sealing effect; The detection sensitivity of the flow rate and the detection lower limit of reducing the minimum flow rate; sixth, because the measuring tube structure 10 is a symmetrical structure, that is, the first port air chamber 12 and the second port air chamber 14 are symmetrically arranged, the first ultrasonic sensor 11 It is symmetrically arranged with the second ultrasonic sensor 13, and the two sealing bolts 18 are also arranged symmetrically. Two port air chambers, two ultrasonic sensors, two sealing bolts and the linear measuring tube 16 can be assembled into the measuring tube body. The structure 10, therefore, the preparation method is simple, which is convenient for mass production.

另外,本领域技术人员还可在本发明精神内做其他变化,当然,这些依据本发明精神所做的变化,都应包含在本发明所要求保护的范围之内。In addition, those skilled in the art can also make other changes within the spirit of the present invention. Of course, these changes made according to the spirit of the present invention should be included within the scope of the claimed protection of the present invention.

Claims (10)

1. A measurement tube structure for an ultrasonic gas meter, comprising:
a first port gas chamber;
a second port gas chamber;
a linear measuring tube;
a first ultrasonic sensor;
a second ultrasonic sensor; and
a seal bolt; wherein the central axes of the first and second ultrasonic sensors coincide with the central axis of the linear measuring tube.
2. The measurement tube structure for an ultrasonic gas meter as set forth in claim 1, wherein the central axes of said first ultrasonic sensor and said second ultrasonic sensor are parallel to and coincident with the central axis of said linear measurement tube.
3. The measurement tube body structure for an ultrasonic gas meter according to claim 1, wherein opposite ends of the linear measurement tube are inserted into the first port chamber and the second port chamber, respectively.
4. The measurement tube structure for an ultrasonic gas meter as set forth in claim 1, wherein said first ultrasonic sensor and said second ultrasonic sensor are symmetrically disposed at opposite ends of said linear measurement tube.
5. The measurement tube structure for an ultrasonic gas meter as set forth in claim 1, wherein said first port chamber has an air inlet, said second port chamber has an air outlet, and said air inlet and said air outlet are located on the same side of said linear measurement tube.
6. The measurement tube body structure for an ultrasonic gas meter as set forth in claim 1, wherein both ends of said linear measurement tube are bell-mouthed.
7. The measurement tube structure for an ultrasonic gas meter according to claim 1, wherein the first ultrasonic sensor is disposed on a side of the first port chamber remote from the linear measurement tube, and the second ultrasonic sensor is disposed on a side of the second port chamber remote from the linear measurement tube.
8. The measurement tube structure for an ultrasonic gas meter according to claim 1, wherein the sealing bolt is provided on a side of the first ultrasonic sensor away from the first port gas chamber, and the sealing bolt is provided on a side of the second ultrasonic sensor away from the second port gas chamber.
9. The measurement tube structure for an ultrasonic gas meter according to claim 1, further comprising a disk having a through hole, the disk being disposed between the first port chamber and the second port chamber, the linear measurement tube being inserted through the through hole into the first port chamber and the second port chamber, respectively.
10. A measurement tube structure for an ultrasonic gas meter, comprising:
a first port air chamber, the first port air chamber having an air inlet;
the second port air chamber is provided with an air outlet;
a linear measuring tube;
a first ultrasonic sensor;
a second ultrasonic sensor; and
a seal bolt; the linear type measuring pipe is characterized in that two opposite ends of the linear type measuring pipe are respectively inserted into the first port air chamber and the second port air chamber; the central axes of the first ultrasonic sensor and the second ultrasonic sensor are coincided with the central axis of the linear measuring pipe.
CN202010332755.7A 2020-04-24 2020-04-24 Measuring pipe body structure for ultrasonic gas meter Pending CN111595397A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4365518A (en) * 1981-02-23 1982-12-28 Mapco, Inc. Flow straighteners in axial flowmeters
JPH1151722A (en) * 1997-08-06 1999-02-26 Yazaki Corp Gas meter and its gas velocity measuring tube
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