WO2023165045A1 - 一种采用内置支撑结构的科氏质量流量计 - Google Patents

一种采用内置支撑结构的科氏质量流量计 Download PDF

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WO2023165045A1
WO2023165045A1 PCT/CN2022/098041 CN2022098041W WO2023165045A1 WO 2023165045 A1 WO2023165045 A1 WO 2023165045A1 CN 2022098041 W CN2022098041 W CN 2022098041W WO 2023165045 A1 WO2023165045 A1 WO 2023165045A1
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Prior art keywords
coriolis mass
mass flowmeter
housing
splitter
flow divider
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PCT/CN2022/098041
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English (en)
French (fr)
Inventor
潘巨光
马春利
尚保园
王涛
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沃森测控技术（河北）有限公司
沃森有限公司
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Priority to CA3234740A priority Critical patent/CA3234740A1/en
Publication of WO2023165045A1 publication Critical patent/WO2023165045A1/zh

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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
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
    • 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
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
    • G01F1/8413—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details 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
    • G01F15/18—Supports or connecting means for meters

Definitions

  • the invention relates to a Coriolis mass flowmeter, in particular to a Coriolis mass flowmeter with a built-in support structure.
  • the measuring tube is connected to the external pipeline through the flow divider and the flange, and the measuring tube is also isolated from the external environment by the support structure and the casing.
  • the housing is directly welded on the support tube, so that the support tube is partly wrapped inside the housing, and other parts or all parts are exposed outside the housing, and the housing does not come into contact with the transmitter support.
  • the support structure is an external structure and needs to provide sufficient support rigidity, its material, thickness, processing characteristics and precision have special requirements, so the production cost is relatively high.
  • the design of the support structure can improve the noise immunity of the flowmeter, so if the production cost is high, it will limit the performance of the flowmeter.
  • the invention provides a Coriolis mass flowmeter with a built-in support structure, the Coriolis mass flowmeter includes a first flow divider, a second flow divider, a support pipe, a first casing, a second casing, and a transmitter support parts, flow tube;
  • One end of the flow tube is connected to the first flow divider, and the other end of the flow tube is connected to the second flow divider;
  • the first flow divider and the second flow divider are fixed through the support tube;
  • the first housing is located on the front of the Coriolis mass flowmeter, connecting the first flow divider and the second flow divider;
  • the second housing is located on the back of the Coriolis mass flowmeter and is connected to the first flow divider and the second flow divider;
  • the first housing is connected to the second housing, and the transmitter support member is connected to the first housing and the second housing;
  • the first housing and the second housing enclose the support tube and the flow tube.
  • the first shell and the second shell are connected by self-fusion welding.
  • the Coriolis mass flowmeter further includes a first flange and a second flange, the first flange and the second flange are respectively connected to the first flow divider and the second flow divider .
  • the support tube is made of stainless steel or carbon steel.
  • the wall thickness of the support tube is 1mm-25mm.
  • the present invention provides a brand-new fully-wrapped design scheme, which uses a metal support tube to connect two shunts together in the form of welding, and the support tubes are all wrapped in the shell.
  • This fully-wrapped design effectively reduces the negative impact on product performance caused by the welding stress generated when welding the shell and is transmitted to the measurement area, and also greatly enhances the strength of the flange in the axial direction. It can effectively separate the vibration frequency of the shell vibration mode and the driving mode, and reduce the noise generated by the shell vibration.
  • Figure 1 is a structural diagram of a Coriolis mass flowmeter.
  • Figure 2 is the second structural diagram of the Coriolis mass flowmeter.
  • the Coriolis mass flowmeter includes a first flow divider (1a), a second flow divider (1b) , support tube (3), first housing (2a), second housing (2b), transmitter support (4), flow tube;
  • One end of the flow tube is connected to the first flow divider, and the other end of the flow tube is connected to the second flow divider;
  • the first flow divider and the second flow divider are fixed through the support tube;
  • the first housing is located on the front of the Coriolis mass flowmeter, connecting the first flow divider and the second flow divider;
  • the second housing is located on the back of the Coriolis mass flowmeter and is connected to the first flow divider and the second flow divider;
  • the first housing is connected to the second housing, and the transmitter support member is connected to the first housing and the second housing;
  • the first housing and the second housing enclose the support tube and the flow tube.
  • the present invention reduces the welding seam between the horizontal shell and the support structure; in addition, the welding between the shell and the shell in the present invention adopts self-fusion welding, and the welding between the shell and the support pipe in the prior art adopts filler welding Compared with filling welding, self-fluxing welding generates less heat, thus reducing welding stress, thereby effectively reducing the negative impact of welding stress on product performance when it is transmitted to the measurement area.
  • the structure of the housing in the present invention enhances the rigidity of the housing, which affects the vibration frequency, so that the vibration frequency of the housing vibration mode and the driving mode can be effectively separated, and the noise generated by the vibration of the housing can be reduced.
  • the Coriolis mass flowmeter further includes a first flange and a second flange, the first flange and the second flange are respectively connected to the first flow divider and the second flow divider .
  • the axial strength of the flange mainly depends on the strength of the support tube, but in the present invention, since the shell wraps the support tube, it is equivalent to adding a layer of ring structure outside the support tube, thus enhancing the axial strength of the flange. strength.
  • the new support structure Since the support tubes in the present invention are all included in the shell, the new support structure has a wider selection of materials, for example, low specification stainless steel or carbon steel can be used. In addition, the new support structure can reduce the requirements on machining accuracy, and some machining features can also be unnecessary. Second, the support structure can use thicker materials to improve the stability of the measurement. Finally, the welding area between the shell and the support structure is reduced, which reduces the transfer of welding stress to the measurement area.
  • This design scheme is applicable not only to the built-in support pipe with a circular cross section, but also to the support pipe with a rectangular cross section or other arbitrary shapes;
  • the wall thickness of the support tube is suitable between 1mm and 25mm. The thicker the wall thickness, the more favorable the impact on the vibration and noise of the shell, but it also brings waste of resources and increased product weight;
  • this design scheme can be applied to flow tubes with smaller diameters (diameter ⁇ 10mm), and can also be applied to flow tubes with larger diameters (diameter>100mm);
  • this design scheme can be applied to various design requirements of Coriolis mass flowmeters, such as different flow tube spacing and different positions of transmitter support flanges.

Abstract

一种采用内置支撑结构的科氏质量流量计，包括第一分流器（膈）、第二分流器（lb）,支撑管（3）、第一外壳（2a）、第二外壳（2b）、流量管；流量管一端连接第一分流器（la）,流量管另一端连接第二分流器（lb）；第一分流器（la）与第二分流器（lb）通过支撑管⑶固定；第一外壳（2a）位于科氏质量流量计正面，连接第一分流器（la）及第二分流器（lb）；第二外壳（2b）位于科氏质量流量计背面，连接第一分流器（la）及第二分流器（lb）；第一外壳（2a）与第二外壳（2b）连接；第一外壳（2a）和第二外壳（2b）包裹支撑管（3）、及流量管。全包裹的设计方案有效地减少了焊接外壳时产生的焊接应力传递到测量区对产品性能产生的负面影响。

Description

一种采用内置支撑结构的科氏质量流量计 技术领域
本发明涉及科氏质量流量计，具体的涉及一种采用内置支撑结构的科氏质量流量计。
背景技术
在科氏质量流量计中，测量管通过分流器和法兰与外界管道相连接，测量管也由支撑结构和外壳与外界环境隔离。现有技术中外壳直接焊接在支撑管上，从而使得支撑管部分包裹在外壳里面，其他部分亦或全部分裸露在外壳外面，外壳并不与变送器支撑件产生接触。
由于支撑结构是外部结构，并且需要提供足够的支撑刚度，它的材质、厚度和加工特征以及精度都有特殊的要求，因而生产成本比较高。此外，支撑结构的设计能够提高流量计的抗干扰性，因此如果生产成本较高，会限制流量计的性能。
发明内容
本发明提供了一种采用内置支撑结构的科氏质量流量计，所述科氏质量流量计包括第一分流器、第二分流器、支撑管、第一外壳、第二外壳、变送器支撑件、流量管；
所述流量管一端连接所述第一分流器，所述流量管另一端连接所述第二分流器；
所述第一分流器与所述第二分流器通过所述支撑管固定；
所述第一外壳位于所述科氏质量流量计正面，连接所述第一分流器及所述第二分流器；
所述第二外壳位于所述科氏质量流量计背面，连接所述第一分流器及所述第二分流器；
所述第一外壳与所述第二外壳连接，所述变送器支撑件连接所述第一外壳与所述第二外壳；
所述第一外壳和所述第二外壳包裹所述支撑管及所述流量管。
优选的，所述第一外壳与所述第二外壳通过自熔焊连接。
优选的，所述科氏质量流量计还包括第一法兰和第二法兰，所述第一法兰和所述第二法兰分别连接所述第一分流器及所述第二分流器。
优选的，所述支撑管为不锈钢或碳钢材质。
优选的，所述支撑管壁厚为1mm～25mm。
本发明提供了一种全新的全包裹的设计方案，采用焊接的形式用一根金属支撑管将两个分流器连接在一起，支撑管全部被包裹在外壳里面。这种全包裹的设计方案有效地减少了焊接外壳时产生的焊接应力传递到测量区对产品性能产生的负面影响，同时也大大增强了法兰轴向方向的强度。能有效地分离外壳振动模态与驱动模态的振动频率，降低外壳振动产生的噪音。
附图说明
图1为科氏质量流量计结构图一。
图2为科氏质量流量计结构图二。
具体实施方式
使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述。
本发明实施例中提供的一种非圆形截面的科氏质量流量计，如图1、2、所示，科氏质量流量计包括第一分流器(1a)、第二分流器(1b)、支撑管(3)、第一外壳(2a)、第二外壳(2b)、变送器支撑件(4)、流量管；
所述流量管一端连接所述第一分流器，所述流量管另一端连接所述第二分流器；
所述第一分流器与所述第二分流器通过所述支撑管固定；
所述第一外壳位于所述科氏质量流量计正面，连接所述第一分流器及所述第二分流器；
所述第二外壳位于所述科氏质量流量计背面，连接所述第一分流器及所述第二分流器；
所述第一外壳与所述第二外壳连接，所述变送器支撑件连接所述第一外壳与所述第二外壳；
所述第一外壳和所述第二外壳包裹所述支撑管及所述流量管。
本发明相比现有技术，减少了一条横向外壳和支撑结构之间的焊缝；另外本发明中外壳与外壳间的焊接采用自熔焊，现有技术中外壳与支撑管的焊接采用填充焊，自熔焊相比于填充焊，产生的热量更少，因此减少了焊接应力，从而有效地减少了焊接应力传递到测量区对产品性能产生的负面影响。
本发明中外壳的结构相比于现有技术，增强了外壳的刚度，刚度影响振动频率，从而能有效地分离外壳振动模态与驱动模态的振动频率，降低外壳振动产生的噪音。
优选的，所述科氏质量流量计还包括第一法兰和第二法兰，所述第一法兰和所述第二法兰分别连接所述第一分流器及所述第二分流器。现有技术法兰轴向强度主要取决于支撑管的强度，而本发明中由于外壳包裹着支撑管，相当于在支撑管外面增加了一层环状结构，因此增强了法兰轴向方向的强度。
由于本发明中的支撑管被全部包括在外壳中，新的支撑结构在材质的选择上就更广泛，比如可以使用低规格的不锈钢或碳钢。另外，新的支撑结构在加工精度上可以降低要求，有些加工特征也可以不需要。其次，支撑结构可以采用更厚的材料，来提高测量的稳定性。最后，外壳与支撑结构的焊接区域减小，这样减少了焊接应力向测量区域的传递。
本设计方案既可适用于截面为圆形的内置支撑管，亦适用于截面为矩形或者其他任意形状的支撑管；
支撑管的壁厚适用于1mm～25mm之间，壁厚越厚越会对外壳振动噪音产生有利影响，但同时亦带来资源的浪费及产品重量增加；
除常规口径的流量管外(10mm≤直径≤100mm)，本设计方案即可适用于较小口径(直径＜10mm)的流量管，亦可适用于口径较大的流量管(直径＞100mm)；
同时本设计方案可适用于多种不同的科氏质量流量计设计要求，例如不同的流量管间距、不同的变送器支撑法兰的位置。
对于本领域技术人员而言，显然本发明不限于上述示范性实施例的细节，而且在不背离本发明的精神或基本特征的情况下，能够以其他的具体形式实现本发明。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本发明的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。 不应将权利要求中的任何附图标记视为限制所涉及的权利要求。

Claims (5)

  1. 一种采用内置支撑结构的科氏质量流量计，其特征在于，所述科氏质量流量计包括第一分流器、第二分流器、支撑管、第一外壳、第二外壳、变送器支撑件、流量管；
    所述流量管一端连接所述第一分流器，所述流量管另一端连接所述第二分流器；
    所述第一分流器与所述第二分流器通过所述支撑管固定；
    所述第一外壳位于所述科氏质量流量计正面，连接所述第一分流器及所述第二分流器；
    所述第二外壳位于所述科氏质量流量计背面，连接所述第一分流器及所述第二分流器；
    所述第一外壳与所述第二外壳连接，所述变送器支撑件连接所述第一外壳与所述第二外壳；
    所述第一外壳和所述第二外壳包裹所述支撑管及所述流量管。
  2. 如权利要求1所述的科氏质量流量计，其特征在于，所述第一外壳与所述第二外壳通过自熔焊连接。
  3. 如权利要求1所述的科氏质量流量计，其特征在于，所述科氏质量流量计还包括第一法兰和第二法兰，所述第一法兰和所述第二法兰分别连接所述第一分流器及所述第二分流器。
  4. 如权利要求1所述的科氏质量流量计，其特征在于，所述支撑管为不锈钢或碳钢材质。
  5. 如权利要求1所述的科氏质量流量计，其特征在于，所述支撑管壁厚为1mm～25mm。
PCT/CN2022/098041 2022-03-02 2022-06-10 一种采用内置支撑结构的科氏质量流量计 WO2023165045A1 (zh)

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CN117307854A (zh) * 2023-11-28 2023-12-29 沃森测控技术（河北）有限公司 分流器及科氏流量计

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CN109470322A (zh) * 2018-12-27 2019-03-15 上海诺仪表有限公司 一种科氏质量流量传感器
CN110388967A (zh) * 2019-09-02 2019-10-29 上海一诺仪表有限公司 U型科氏质量流量计的分流体及u型科氏质量流量计
CN114812715A (zh) * 2022-03-02 2022-07-29 沃森测控技术（河北）有限公司 一种采用内置支撑结构的科氏质量流量计

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