Electromagnetic flowmeter assembly

Abstract

The utility model provides an electromagnetic flowmeter assembly which comprises a measuring pipeline, the measuring pipeline further comprises an upstream pipe section, a middle pipe section, a downstream pipe section and a reducing pipe section located between the upstream pipe section and the middle pipe section, and the diameter of the upstream pipe section is larger than that of the middle pipe section; the pipe diameter of the reducing pipe section is gradually reduced in the direction towards the middle pipe section; the electromagnetic flowmeter measuring unit is arranged on the middle pipe section of the measuring pipeline; the exhaust valve is arranged at the position, close to the reducing pipe section, of the upstream pipe section. The electromagnetic flowmeter assembly can remarkably reduce the influence of bubbles on measurement.

Description

Technical Field

[0001] This application relates to the field of flow meter technology, and in particular to an electromagnetic flow meter assembly with venting function. Background Technology

[0002] An electromagnetic flowmeter is a device that uses Faraday's law of electromagnetic induction to measure the volumetric flow rate of conductive liquids. When the fluid being measured contains air bubbles, these bubbles can significantly affect the accuracy of the measurement results. The presence of air bubbles interferes with the fluid flow pattern, causing localized changes in flow velocity, and further affecting the stability of the measurement.

[0003] For measurements at low flow rates, the effect of air bubbles is particularly significant because the induced electromotive force signal generated at low flow rates is weak. Any minute change caused by air bubbles can be amplified. Furthermore, low flow rates promote gas-liquid phase stratification, leading to larger deviations in the measurement results. In addition, air bubbles can create air resistance within the measuring tube, affecting the normal flow of the fluid.

[0004] Finally, although an independent exhaust device can be installed for the process pipeline, if the entire process pipeline is a straight pipe, then under certain pressure, the gas cannot be completely vented through a single exhaust port. Utility Model Content

[0005] To address the aforementioned problems in the prior art, this application provides an electromagnetic flowmeter assembly with an exhaust function. This invention optimizes the inner diameter of existing electromagnetic flowmeters by reducing their diameter and incorporates an exhaust device in the front half of the flowmeter (the medium inflow end, i.e., upstream), thus achieving an integrated solution for the exhaust device and the electromagnetic flowmeter.

[0006] An embodiment of this utility model provides an electromagnetic flowmeter assembly, comprising:

[0007] The measuring pipeline further includes: an upstream pipe section, an intermediate pipe section, a downstream pipe section, and a reduced-diameter pipe section located between the upstream pipe section and the intermediate pipe section, wherein the diameter of the upstream pipe section is larger than the diameter of the intermediate pipe section, and the diameter of the reduced-diameter pipe section gradually decreases along the direction toward the intermediate pipe section.

[0008] An electromagnetic flowmeter measuring unit, wherein the electromagnetic flowmeter measuring unit is disposed on the intermediate pipe section of the measuring pipe; and

[0009] An air vent valve is located on the upstream pipe section at a position adjacent to the reduced diameter pipe section.

[0010] According to one embodiment of the present invention, in the above-mentioned electromagnetic flowmeter assembly, the diameter of the reduced-diameter pipe section gradually changes at a preset reduction angle.

[0011] According to one embodiment of the present invention, in the above-mentioned electromagnetic flowmeter assembly, the preset diameter reduction angle of the reduced-diameter pipe section is less than or equal to 8 degrees.

[0012] According to one embodiment of the present invention, the electromagnetic flowmeter assembly further includes: an enlarged diameter pipe section located between the intermediate pipe section and the downstream pipe section.

[0013] The downstream pipe section has the same diameter as the upstream pipe section, and the diameter of the expanded pipe section gradually decreases along the direction toward the intermediate pipe section.

[0014] According to one embodiment of the present invention, in the above-described electromagnetic flowmeter assembly, the diameter of the expanding pipe section gradually increases towards the downstream pipe section at the same angle as the preset reducing angle.

[0015] According to one embodiment of the present invention, in the above-described electromagnetic flowmeter assembly, flanges are respectively provided at both ends of the measuring pipe.

[0016] According to one embodiment of the present invention, in the above-described electromagnetic flowmeter assembly, the exhaust valve further includes:

[0017] The exhaust pipe is connected to the upstream pipe section;

[0018] An exhaust port is located at the top of the exhaust pipe, and the diameter of the exhaust port is larger than the diameter of the exhaust pipe to form a cavity;

[0019] A float, disposed within the cavity of the exhaust port, wherein the diameter of the float is larger than the diameter of the exhaust pipe; and

[0020] A cover plate covers the top of the exhaust port, and a vent hole is provided in the middle of the cover plate. The diameter of the vent hole is smaller than the diameter of the float.

[0021] It should be understood that the above general description and the following detailed description of the present invention are exemplary and illustrative, and are intended to provide further explanation of the present invention as described in the claims. Attached Figure Description

[0022] The accompanying drawings are included to provide a further understanding of the present invention. They are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the present invention and, together with this specification, serve to explain the principles of the present invention. In the drawings:

[0023] Figure 1 This is a cross-sectional view of an embodiment of the electromagnetic flowmeter assembly according to the present invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Measuring Pipelines

[0026] 11. Upstream pipe section

[0027] 12 Intermediate Pipe Section

[0028] 13 Downstream Pipeline Section

[0029] 14. Reduced diameter pipe section

[0030] 15 Expanded diameter pipe section

[0031] 20 Electromagnetic Flowmeter Measurement Unit

[0032] 30 Exhaust valve

[0033] 31 Exhaust pipe

[0034] 32 Exhaust Port

[0035] 33 Float

[0036] 34 Cover plate

[0037] 35 Vent holes

[0038] 40 flange Detailed Implementation

[0039] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Preferred embodiments of the present invention will now be described in detail, examples of which are shown in the drawings. Wherever possible, the same reference numerals will be used in all the drawings to denote the same or similar parts. Furthermore, although the terminology used in this invention is selected from commonly known and used terminology, some terms mentioned in this specification may have been chosen by the applicant at his or her judgment, and their detailed meanings are explained in the relevant sections of the description herein. Moreover, the present invention should be understood not only by the actual terms used, but also by the meaning implied by each term.

[0040] The basic principles and preferred embodiments of this invention will be discussed in more detail with reference to the accompanying drawings. Figure 1 As shown, the electromagnetic flowmeter assembly of this utility model mainly includes: a measuring pipe 10, an electromagnetic flowmeter measuring unit 20, and an exhaust valve 30. Furthermore, flanges 40 can be respectively installed at both ends of the measuring pipe 10.

[0041] The measuring pipe 10 further includes: an upstream pipe section 11, an intermediate pipe section 12, a downstream pipe section 13, and a reduced-diameter pipe section 14 located between the upstream pipe section 11 and the intermediate pipe section 12. The aforementioned "upstream" and "downstream" refer to the flow direction of the measured fluid within the measuring pipe 10 (e.g.,...). Figure 1 As indicated by the arrow in the image. From Figure 1 As can be seen, the diameter of the upstream pipe section 11 is larger than the diameter of the middle pipe section 12, and the diameter of the reduced-diameter pipe section 14 gradually decreases along the direction toward the middle pipe section 12.

[0042] exist Figure 1 In the illustrated embodiment, the diameter of the reduced-diameter pipe section 14 gradually changes at a preset reduction angle. This preset reduction angle is preferably less than or equal to 8 degrees. This reduction of less than or equal to 8 degrees has little impact on the flow field.

[0043] Furthermore, the electromagnetic flowmeter assembly in the above embodiments also includes an expanding pipe section 15 located between the intermediate pipe section 12 and the downstream pipe section 13. According to one embodiment, the diameter of the downstream pipe section 13 is the same as the diameter of the upstream pipe section 11, and the diameter of the expanding pipe section 15 gradually decreases along the direction toward the intermediate pipe section 12. Preferably, the diameter of the expanding pipe section 15 gradually increases toward the downstream pipe section 13 at the same angle as the preset reduction angle of the reducing pipe section 14.

[0044] The electromagnetic flowmeter measuring unit 20 is installed on the middle pipe section 12 of the measuring pipe 10.

[0045] The vent valve 30 is located on the upstream pipe section 11 adjacent to the reduced diameter section 14. Since gas separated from the fluid tends to accumulate at the expansion section, by placing the vent valve 30 on the upstream expansion section of the electromagnetic flowmeter measuring unit, it is easier to expel the air bubbles and gas from the instrument.

[0046] Furthermore, the exhaust valve 30 may further include: an exhaust pipe 31 connected to the upstream pipe section 11, an exhaust port 32, a float 33, and a cover plate 34. The structure of the exhaust valve 30 enables it to exhaust gas without draining water.

[0047] like Figure 1 As shown, an exhaust port 32 is located at the top of the exhaust pipe 31. The diameter of the exhaust port 32 is larger than the diameter of the exhaust pipe 31, forming a cavity. A float 33 is disposed within the cavity of the exhaust port 32. The diameter of the float 33 is larger than the diameter of the exhaust pipe 31. Furthermore, a cover plate 34 covers the top of the exhaust port 32, and a vent hole 35 is provided in the center of the cover plate 34. The diameter of the vent hole 35 is smaller than the diameter of the float 33.

[0048] By optimizing the design by reducing the diameter of a portion of the electromagnetic flowmeter and designing an exhaust device at the upstream pipe section 11 of the flowmeter, this utility model can achieve an integrated design of the exhaust valve and the electromagnetic flowmeter, and has a good exhaust function.

[0049] In summary, the electromagnetic flowmeter assembly of this application designs a portion of the inner diameter of the measuring pipe of the electromagnetic flowmeter as a reduced diameter, causing the gas in the measuring pipe to concentrate at the expanded diameter section and then be discharged through an exhaust valve located at the expanded diameter section. This structure can continuously and maximally remove gas from the measuring pipe, reducing the influence of air bubbles on the measurement and ensuring the continuity and stability of the measurement. Secondly, since the reduced diameter electromagnetic flowmeter is more sensitive to the measurement of small flow rates, this invention can also improve the measurement accuracy and range ratio, especially in applications requiring the measurement of minute flow rates. Thirdly, for fluid systems containing a certain amount of gas, the exhaust function of this invention allows the electromagnetic flowmeter to better adapt to different fluid conditions, improving its adaptability. Finally, this invention is suitable for optimizing space layout; for space-constrained installation environments, the reduced diameter electromagnetic flowmeter with exhaust function occupies less space, facilitating installation, layout, and maintenance.

[0050] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. An electromagnetic flowmeter assembly, characterized in that, include: The measuring pipe (10) further includes: an upstream pipe section (11), an intermediate pipe section (12), a downstream pipe section (13), and a reduced-diameter pipe section (14) located between the upstream pipe section (11) and the intermediate pipe section (12), wherein the diameter of the upstream pipe section (11) is larger than the diameter of the intermediate pipe section (12), and the diameter of the reduced-diameter pipe section (14) gradually decreases along the direction toward the intermediate pipe section (12); An electromagnetic flowmeter measuring unit (20) is disposed on the intermediate pipe section (12) of the measuring pipe (10); and An exhaust valve (30) is located on the upstream pipe section (11) at a position adjacent to the reduced diameter pipe section (14).

2. The electromagnetic flowmeter assembly as described in claim 1, characterized in that, The diameter of the reduced-diameter pipe section (14) gradually changes at a preset reduction angle.

3. The electromagnetic flowmeter assembly as described in claim 2, characterized in that, The preset reduction angle of the reduced diameter pipe section (14) is less than or equal to 8 degrees.

4. The electromagnetic flowmeter assembly as described in claim 2, characterized in that, Further includes: The enlarged diameter pipe section (15) located between the intermediate pipe section (12) and the downstream pipe section (13), The downstream pipe section (13) has the same diameter as the upstream pipe section (11), and the diameter of the expanded pipe section (15) gradually decreases along the direction toward the intermediate pipe section (12).

5. The electromagnetic flowmeter assembly as described in claim 4, characterized in that, The diameter of the expanded pipe section (15) gradually increases towards the downstream pipe section (13) at the same angle as the preset reduced diameter angle.

6. The electromagnetic flowmeter assembly as described in claim 1, characterized in that, Flanges (40) are provided at both ends of the measuring pipe (10).

7. The electromagnetic flowmeter assembly as described in claim 1, characterized in that, The exhaust valve (30) further includes: The exhaust pipe (31) is connected to the upstream pipe section (11); An exhaust port (32) is provided at the top of the exhaust pipe (31), and the diameter of the exhaust port (32) is larger than the diameter of the exhaust pipe (31) to form a cavity; A float (33) is disposed within the cavity of the exhaust port (32), the diameter of the float (33) being larger than the diameter of the exhaust pipe (31); and A cover plate (34) covers the top of the exhaust port (32), and a vent hole (35) is provided in the middle of the cover plate (34). The diameter of the vent hole (35) is smaller than the diameter of the float (33).

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