Single-tube double-layer Coriolis mass flowmeter measuring tube

Abstract

A single-tube double-layer Coriolis mass flow meter measuring tube relates to the technical field of mass flow meter measuring tubes, and adopts the technical scheme that the single-tube double-layer Coriolis mass flow meter measuring tube comprises a first connecting section, a measuring tube main body and a second connecting section, and the measuring tube main body comprises an upper-layer pipeline, an inclined tube and a lower-layer pipeline which are connected in sequence; the upper-layer pipeline and the lower-layer pipeline are arranged in parallel and are symmetrical about the central axis of the measuring pipe main body; the upper-layer pipeline is connected with the first connecting section, and the lower-layer pipeline is connected with the second connecting section; and each of the first connecting section and the second connecting section comprises an elbow and a straight pipe connected with the elbow. According to the utility model, a single pipeline is adopted to replace a common shunting body-double-pipe structure in the prior art, so that the working conditions of shunting and converging do not exist, and the pressure loss is effectively reduced; the calibration coefficient of the mass flow meter is effectively reduced, and the calibration coefficient of a measuring pipe of the same pipe type is one half of the calibration coefficient of a shunting body-double pipe structure.

Description

Technical Field

[0001] The utility model relates to the technical field of mass flowmeter measuring tubes, in particular to a single-tube double-layer Coriolis mass flowmeter measuring tube. Background Art

[0002] Coriolis mass flowmeters can have single, dual, or multiple measuring tubes. Currently, dual-tube flowmeters are the most widely used and technologically mature. Dual-tube flowmeters typically employ two independent measuring tubes arranged in parallel. A splitter mechanism divides the flow into the two tubes and then reunites them. However, the flow must be divided and reunited at the front and rear ends of the measuring tubes, which inevitably results in pressure loss and a large calibration factor, affecting metering accuracy. Utility Model Content

[0003] Aiming at the problems in the existing technical solutions such as the diversion and confluence of the diverter-double-tube structure causing pressure loss and the large calibration coefficient affecting the measurement accuracy, the utility model provides a single-tube double-layer Coriolis mass flowmeter measuring tube.

[0004] The utility model provides the following technical solutions: a single-tube double-layer Coriolis mass flowmeter measuring tube, comprising a first connecting section, a measuring tube body, and a second connecting section;

[0005] The measuring tube body comprises an upper layer pipe, an inclined pipe and a lower layer pipe connected in sequence, the upper layer pipe and the lower layer pipe are arranged in parallel and symmetrically about the central axis of the measuring tube body, and the upper layer pipe and the lower layer pipe are both provided with a plurality of elbows;

[0006] The first connecting section and the second connecting section each include an elbow and a straight pipe connected to the elbow, the upper pipe is connected to the elbow of the first connecting section, and the lower pipe is connected to the elbow of the second connecting section. The straight pipes of the first connecting section and the second connecting section are both located in the center of the upper pipe and the lower pipe, and the straight pipes of the first connecting section and the second connecting section extend in opposite directions and their central axes are collinear.

[0007] Preferably, the measuring tube body, the first connecting section and the second connecting section are integrally formed.

[0008] Preferably, the upper and lower pipelines each include a first straight section, a first elbow, a second straight section, a second elbow, and a third straight section connected in sequence, and the inclined pipe is connected between the third straight section of the upper pipeline and the first straight section of the lower pipeline. The first straight section and the third straight section are symmetrical about the central axis of the upper pipeline, and the first elbow and the second elbow are symmetrical about the central axis of the upper pipeline.

[0009] Preferably, the upper pipe and the lower pipe are triangular.

[0010] Preferably, the connection points between the two ends of the inclined pipe and the upper pipe and the lower pipe are rounded.

[0011] The beneficial effects of the present invention are: a single pipeline is used to replace the diverter-double-tube structure commonly used in the prior art, and there is no diversion or confluence working condition, which effectively reduces the pressure loss; it effectively reduces the calibration coefficient of the mass flow meter. For the same type of measuring tube, the calibration coefficient of the present invention is half of the calibration coefficient of the diverter-double-tube structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A three-dimensional schematic diagram of an embodiment of a flow tube.

[0013] Figure 2 A side view of one embodiment of a flow tube.

[0014] Figure 3 A top view of one embodiment of a flow tube.

[0015] Figure numerals: 10, first connecting section; 11, elbow; 12, straight pipe; 20, measuring tube body; 21, upper pipeline; 211, first straight section; 212, first elbow; 213, second straight section; 214, second elbow; 215, third straight section; 22, inclined pipe; 23, lower pipeline; 30, second connecting section. DETAILED DESCRIPTION

[0016] The following is a more detailed description of the embodiments of the present invention with reference to the accompanying drawings and reference numerals, so that those skilled in the art can implement the invention after studying this specification. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] The utility model provides a single-tube double-layer Coriolis mass flowmeter measuring tube, comprising a first connecting section 10, a measuring tube body 20 and a second connecting section 30 connected in sequence. It is formed by bending a straight tube and is integrally formed without joints.

[0018] Please refer to Figure 1-3The measuring tube body 20 includes an upper pipe 21, an inclined pipe 22, and a lower pipe 23, which are connected in sequence. The upper and lower pipes 21, 23 are arranged in parallel and symmetrically about the central axis C1 of the measuring tube body, ensuring the consistency of the pipe shape and ensuring measurement accuracy. Specifically, the upper and lower pipes 21, 23 are triangular in shape, each including a first straight section 211, a first elbow 212, a second straight section 213, a second elbow 214, and a third straight section 215, which are connected in sequence. The first elbow 212 and the second elbow 214 are bent and have rounded corners. The inclined pipe 22 is connected between the third straight section of the upper pipe 21 and the first straight section of the lower pipe 23, and the ends of the inclined pipe 22 are also bent into rounded corners at the connection with the upper and lower pipes 21, 23. The first and third straight sections are symmetrical about the central axis of the upper pipe, and the first and second elbows are symmetrical about the central axis C2 of the upper pipe, to improve measurement accuracy.

[0019] The first connecting section 10 and the second connecting section 30 each include an elbow 11 and a straight pipe 12 connected to the elbow 11. The elbow 11 is also bent. The elbow of the first connecting section 10 is connected to the upper pipe 21, while the elbow of the second connecting section 30 is connected to the lower pipe 23. The straight pipes 12 of the first connecting section 10 and the second connecting section 30 are both located in the center of the upper and lower pipes 21 and 23. They extend in opposite directions with their central axes collinear, facilitating communication with the pipe being measured.

[0020] The above is a description of one or more embodiments of the present invention, and while the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A single-tube double-layer Coriolis mass flowmeter measuring tube, characterized in that: It includes a first connecting section, a measuring tube body and a second connecting section; The measuring tube body comprises an upper layer pipe, an inclined pipe and a lower layer pipe connected in sequence, the upper layer pipe and the lower layer pipe are arranged in parallel and symmetrically about the central axis of the measuring tube body, and the upper layer pipe and the lower layer pipe are both provided with a plurality of elbows; The first connecting section and the second connecting section each include an elbow and a straight pipe connected to the elbow, the upper pipe is connected to the elbow of the first connecting section, and the lower pipe is connected to the elbow of the second connecting section. The straight pipes of the first connecting section and the second connecting section are both located in the center of the upper pipe and the lower pipe, and the straight pipes of the first connecting section and the second connecting section extend in opposite directions and their central axes are collinear.

2. The single-tube double-layer Coriolis mass flowmeter measuring tube according to claim 1, characterized in that: The measuring tube body, the first connecting section and the second connecting section are integrally formed.

3. The single-tube double-layer Coriolis mass flowmeter measuring tube according to claim 1, characterized in that: The upper and lower pipelines each include a first straight section, a first elbow, a second straight section, a second elbow, and a third straight section connected in sequence. The inclined pipe is connected between the third straight section of the upper pipeline and the first straight section of the lower pipeline. The first straight section and the third straight section are symmetrical about the central axis of the upper pipeline, and the first elbow and the second elbow are symmetrical about the central axis of the upper pipeline.

4. The single-tube double-layer Coriolis mass flowmeter measuring tube according to claim 3, characterized in that: The upper layer pipeline and the lower layer pipeline are triangular.

5. The single-tube double-layer Coriolis mass flowmeter measuring tube according to claim 1, characterized in that: The connection places between the two ends of the inclined pipe and the upper pipe and the lower pipe are all rounded.

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