CN216116182U - Flowmeter pipeline and ultrasonic flowmeter - Google Patents

Abstract

The utility model provides a flowmeter pipeline and an ultrasonic flowmeter, wherein the flowmeter pipeline comprises an inlet, an outlet and a side wall; the inner wall surface of the side wall comprises a reflection inner wall surface, and the reflection inner wall surface comprises a reflection point falling area of the ultrasonic wave; the reflecting inner wall surface is arranged in an inclined plane, one end of the reflecting inner wall surface, which is close to the inlet, inclines towards the direction far away from the central shaft of the flowmeter pipeline, and one end of the reflecting inner wall surface, which is close to the outlet, inclines towards the direction close to the central shaft. The utility model leads the receiving point of the ultrasonic wave to be in front, so that the receiving area falls into the vicinity of the center of the transducer, the diameter of the transducer is reduced, and the cost is reduced.

Description

Flowmeter pipeline and ultrasonic flowmeter

Technical Field

The utility model relates to the technical field of measuring instruments, in particular to a flowmeter pipeline and an ultrasonic flowmeter.

Background

The ultrasonic flowmeter is based on the principle that the propagation speed of ultrasonic waves in a flowing medium is equal to the vector sum of the average flow speed of a measured medium and the speed of the ultrasonic waves in a static medium, adopts a non-contact mode for measurement, does not need to be in direct contact with the measured medium, has a measurement structure which is not influenced by the viscosity and the conductivity of the measured medium, and can be used for measuring the flow of various liquids or gases.

In the related art, a V-shaped ultrasonic flow meter includes a flow meter pipe, two transducers, and a signal processing device. The side wall of the flowmeter pipeline is provided with a first transducer and a second transducer, the two transducers respectively correspond to the upstream and the downstream of a measured medium and are arranged at an included angle, and ultrasonic pulse signals are transmitted and received in turn. The inner wall surface of the side wall on the opposite side of the two transducers on the flowmeter pipeline is used as a reflecting surface of ultrasonic waves, receives the ultrasonic waves transmitted by one transducer and reflects the ultrasonic waves to the other transducer. The signal processing device calculates the velocity of the fluid by measuring the difference between the downstream and upstream propagation velocities of the ultrasonic pulse signals at known intervals. When the flow of the measuring pipeline is large, the reflection point and the receiving point of the ultrasonic wave are shifted under the pushing of the flow of the measured medium.

In order to accommodate the offset between the reflection point and the reception point of the ultrasonic wave in the above technical solutions, the diameter of the transducer needs to be increased, which results in increased cost.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the problems mentioned in the background art, the utility model provides a flowmeter pipeline and an ultrasonic flowmeter, wherein a receiving point of ultrasonic waves is arranged in front, so that a receiving area falls near the center of a transducer, the diameter of the transducer is reduced, and the cost is reduced.

To achieve the above objects, in a first aspect, the present invention provides a flowmeter conduit comprising an inlet, an outlet, and a sidewall; the inner wall surface of the side wall comprises a reflection inner wall surface, and the reflection inner wall surface comprises a reflection point falling area of the ultrasonic wave; the reflecting inner wall surface is arranged in an inclined plane, one end of the reflecting inner wall surface, which is close to the inlet, inclines towards the direction far away from the central shaft of the flowmeter pipeline, and one end of the reflecting inner wall surface, which is close to the outlet, inclines towards the direction close to the central shaft.

As a further aspect of the first aspect of the present invention, an inner wall surface between the reflecting inner wall surface and the inlet is provided obliquely and extends in an oblique direction of the reflecting inner wall surface; the inner wall surface between the reflecting inner wall surface and the outlet is obliquely arranged and extends along the oblique direction of the reflecting inner wall surface.

As a further aspect of the first aspect of the present invention, the inner wall surface of the side wall further includes a transduction inner wall surface, the transduction inner wall surface is located on an opposite side of the reflection inner wall surface, the transduction inner wall surface is disposed in an inclined plane, an end of the transduction inner wall surface close to the inlet is inclined in a direction away from the central axis, and an end of the transduction inner wall surface close to the outlet is inclined in a direction close to the central axis.

As a further aspect of the first aspect of the present invention, an inner wall surface between the transduction inner wall surface and the inlet is provided obliquely, and extends in an oblique direction of the transduction inner wall surface; the inner wall surface between the energy conversion inner wall surface and the outlet is obliquely arranged and extends along the oblique direction of the energy conversion inner wall surface.

As a further aspect of the first aspect of the present invention, an angle between the reflecting inner wall surface and the central axis is β, and β is 0.5 ° or more and 2 ° or less.

As a further aspect of the first aspect of the present invention, a passage is connected to the inlet and/or the outlet, and the passage has a cross-sectional area that gradually increases in a direction away from the center of the flowmeter conduit.

As a further aspect of the first aspect of the present invention, the flowmeter pipe includes a rectangular pipe having a rectangular cross section, and the reflecting inner wall surface and the transducing inner wall surface are symmetrically disposed on side walls on opposite sides of the rectangular pipe.

In a second aspect, the present invention provides an ultrasonic flowmeter, including a transducer and the flowmeter pipeline, where the transducer includes a first transducer and a second transducer, the first transducer and the second transducer are installed at a side wall corresponding to a transduction inner wall surface of the flowmeter pipeline, a connection line between a center of the first transducer and a center of the second transducer is parallel to a central axis of the flowmeter pipeline, a transduction end surface of the first transducer and a transduction end surface of the second transducer both face the center of a reflection inner wall surface of the flowmeter pipeline, and the transduction end surface of the first transducer and the transduction end surface of the second transducer are arranged at an included angle.

As a further proposal of the second aspect of the utility model, the included angle between the transducing end face of the first transducer and the transducing end face of the second transducer is gamma, and gamma is more than or equal to 90 degrees and less than or equal to 120 degrees.

As a further aspect of the second aspect of the utility model, the transducer is mounted to the flow meter conduit by a wedge tube; the wedge-shaped pipe comprises a first wedge-shaped pipe and a second wedge-shaped pipe; the first end of the first wedge-shaped pipe and the first end of the second wedge-shaped pipe are both integrally connected to the flowmeter pipeline, and the first wedge-shaped pipe and the second wedge-shaped pipe are both communicated with the flowmeter pipeline; the first transducer is mounted to the second end of the first wedge tube and the second transducer is mounted to the second end of the second wedge tube.

The utility model provides a flowmeter pipeline and an ultrasonic flowmeter.A reflecting inner wall surface is arranged to be an inclined surface, and the inclined surface is offset from one end of an inlet to one end of an outlet in a direction close to a central shaft. The ultrasonic flowmeter comprises the transducer and the flowmeter pipeline, and has the same beneficial effects.

The construction and other objects and advantages of the present invention will be more apparent from the description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a flowmeter pipeline provided in accordance with one possible embodiment of the present invention;

FIG. 2 is a schematic piping diagram of a flow meter according to one possible embodiment of the utility model;

FIG. 3 is a schematic block diagram of an ultrasonic flow meter according to another possible embodiment of the utility model;

FIG. 4 is an exploded schematic view of an ultrasonic flow meter provided in accordance with another possible embodiment of the present invention;

FIG. 5 is a diagram illustrating a first measurement scenario of the prior art;

FIG. 6 is a schematic illustration of the first measurement scenario of FIG. 3;

FIG. 7 is a diagram illustrating a second measurement scenario of the prior art;

FIG. 8 is a schematic illustration of the second measurement scenario of FIG. 3;

FIG. 9 is a diagram illustrating a third measurement scenario of the prior art;

FIG. 10 is a schematic illustration of the third measurement scenario of FIG. 3;

FIG. 11 is a diagram illustrating a fourth measurement scenario of the prior art;

fig. 12 is a schematic diagram of a fourth measurement scenario of fig. 3.

Description of reference numerals:

100-an ultrasonic flow meter, wherein,

110-a flow meter conduit;

111-a first side wall; 1111-reflective inner wall surface;

112-a second side wall; 1121-transducing inner wall surface;

113-a third sidewall;

114-a fourth side wall;

115-inlet;

116-an outlet;

117-central axis;

121-a first wedge tube; 122-second wedge tube

210-a first transducer; 220-a second transducer;

300-horizontal flow channel ultrasonic flowmeter;

311-a first horizontal inner side wall;

312-a second horizontal inner side wall;

410-horizontal flow channel; 411-incident sound wave; 412-horizontal flow path reflection sound wave; 413-horizontal flow

A lane normal;

420-inclined plane runner; 422-the inclined flow channel reflects sound waves; 423-inclined plane flow path normal.

Detailed Description

The V-shaped ultrasonic flowmeter is provided with a horizontal flow channel, the first transducer and the second transducer transmit ultrasonic waves at a set incident angle in turn, the ultrasonic waves fall into a preset area of a reflection point of the horizontal flow channel, and the ultrasonic waves are reflected and then change the propagation direction to be received by the other transducer.

When the medium to be measured is in a micro flow, the transmission, reflection and reception of the ultrasonic wave can be measured normally due to the fact that the driving force of the medium to be measured is small.

When the medium to be measured is in large flow, the propagation direction of the ultrasonic wave deviates along the flowing direction of the medium to be measured due to the fact that the pushing force of the medium to be measured is increased. When the ultrasonic wave is transmitted along the flowing direction, the reflecting point moves forward along the flowing direction (the flowing direction is forward, and the reverse direction of the flowing direction is backward), the incident angle is increased, the corresponding reflecting angle is also increased, the receiving point deviates from the center and shifts forward, and the size of the transducer in the forward direction needs to be increased; when the ultrasonic wave propagates in the reverse direction along the flow direction, the reflection point shifts backward in the reverse direction, the incident angle decreases, the corresponding reflection angle decreases, the receiving point shifts backward from the center, and the transducer needs to increase the size in the backward direction.

Considering that two transducers are symmetrically arranged, in order to meet the metering requirement and receive a sufficient amount of ultrasonic waves, the diameters of the two transducers need to be simultaneously increased, so that the cost of the transducers is increased, and the energy consumption is higher.

The utility model provides a flowmeter pipeline and an ultrasonic flowmeter.A reflecting inner wall surface is arranged to be an inclined surface, and the inclined surface is offset from one end of an inlet to one end of an outlet in a direction close to a central shaft. The ultrasonic flowmeter comprises the transducer and the flowmeter pipeline, and has the same beneficial effects.

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the utility model. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example one

FIG. 1 is a schematic diagram of a flowmeter pipeline provided in accordance with one possible embodiment of the present invention; fig. 2 is a schematic diagram of a flowmeter pipeline according to one possible embodiment of the utility model.

Referring to fig. 1-2, one possible embodiment of the present invention provides a flowmeter conduit 110 comprising an inlet 115, an outlet 116, and a sidewall. The inner wall surface of the side wall includes a reflection inner wall surface 1111, and the reflection inner wall surface 1111 includes a reflection point of the ultrasonic wave falling into the region. The reflecting inner wall surface 1111 is provided as an inclined surface, and one end of the reflecting inner wall surface 1111 near the inlet 115 is inclined in a direction away from the center axis 117 of the flowmeter conduit 110, and one end of the reflecting inner wall surface 1111 near the outlet 116 is inclined in a direction near the center axis 117.

Of the opposing sidewalls of the flow meter conduit 110, one sidewall is provided with two transducers that alternately emit and receive ultrasonic waves, and the other sidewall is provided with a reflecting inner wall surface 1111 that includes a region where a reflection point falls. The reflecting inner wall surface 1111 is disposed so as to be close to the central axis along the flow direction and to be deflected at a predetermined angle with respect to the horizontal flow path.

The flowmeter pipe 110 can be a circular pipe, a square pipe or a rectangular pipe, and two opposite side walls can be provided, wherein the first side wall 111 is used as a reflecting inner wall surface, and the second side wall 112 is used for mounting a transducer. The reflecting inner wall surface 1111 includes all possible regions into which the reflection point of the ultrasonic wave in the theoretical design may fall (for example, refer to a region between two dotted lines at the inner wall surface of the first sidewall 111 in fig. 1), and the region in the related art is entirely represented as a plane region, which is set as an inclined surface. Inner wall surfaces on both axial sides of the reflection inner wall surface 1111 are optionally kept continuous with the reflection inner wall surface 1111 and extend in the same direction as the reflection inner wall surface 1111; or it may be designed as a horizontal plane or include a curved surface smoothly connected to the inner wall 1111 of the reflector, and then set as a horizontal plane. The inner wall surfaces of the radial both sides of the reflection inner wall surface 1111 may be smoothly transited or may not be designed, and each maintains the original structure.

When the reflecting inner wall 1111 is set as an inclined plane with the outlet end close to the central shaft and the measured medium is in large flow, the receiving point of the ultrasonic wave is biased towards the center of the transducer.

Take the example that the ultrasonic wave is emitted from the lower side near the inclined plane (i.e., the side near the entrance). As shown in fig. 2, the solid line shows the reflection path of the horizontal flow channel 410 (i.e., the reflection surface is a horizontal plane, and the normal line is perpendicular to the central axis), and the dotted line shows the reflection path of the inclined flow channel 420 of the present embodiment (i.e., the reflection inner wall surface 1111 is an inclined surface). It can be known that the inclined flow channel 420 is turned over counterclockwise by an angle β relative to the horizontal flow channel 410, when the horizontal flow channel 410 is replaced by the inclined flow channel 420, the incident angle of the incident sound wave 411 is decreased by the angle β, and the reflection angle also needs to be decreased by the angle β, because the normal 423 of the inclined flow channel rotates counterclockwise with the inclined flow channel 420, the sound wave 422 reflected by the inclined flow channel rotates counterclockwise by 2 β along the original horizontal flow channel to reflect the sound wave 412, that is, on the transduction end surface of the transducer, the position of the receiving point of the inclined flow channel 420 deflects counterclockwise toward the center of the transducer compared to the situation that the receiving point of the original horizontal flow channel 410 deviates clockwise from the center of the transducer.

Similarly, when the ultrasonic wave is emitted from the side close to the higher side of the inclined plane (i.e. the side close to the outlet), the incident angle of the incident sound wave 411 is increased by an angle β, and the reflection angle is correspondingly increased by an angle β, but because the inclined plane channel 420 rotates counterclockwise by an angle β, the inclined plane channel reflects the sound wave 422 and rotates counterclockwise by 2 β along the original horizontal channel reflecting the sound wave 412, that is, on the transducing end surface of the transducer, the position of the receiving point of the inclined plane channel 420 deflects counterclockwise toward the center of the transducer compared to the case that the receiving point of the original horizontal channel 410 deviates clockwise from the center of the transducer.

Therefore, in the flow meter pipe 110 of the present embodiment, the reflecting inner wall surface 1111 is set as an inclined surface, and the reflecting inner wall surface is inclined from one end of the inlet 115 to one end of the outlet 116 in a direction close to the central axis 117, so that when the ultrasonic wave propagates in the flow direction, the incident angle is reduced, and when the ultrasonic wave propagates in the reverse direction of the flow direction, the incident angle is increased, the receiving point can be biased toward the center, the total receiving area falls into the vicinity of the center of the transducer, the diameter of the transducer is reduced, and the cost and the energy consumption are reduced.

The principle of calculation of the flow range of the measured medium can also be inferred from fig. 2.

The assumption is that: when the reflecting surface has a horizontal flow, the horizontal flow channel reflects the sound wave 412 to be perpendicular to the transduction end face of the transducer at the receiving end, the sound path length of the ultrasonic wave is L, the complementary angle of the incident sound wave is α, and the inclined flow channel 420 is turned over counterclockwise by an angle β relative to the horizontal flow channel 410.

When the horizontal bottom surface deflects beta, the reflected sound wave deflects 2 beta, when the beta is smaller, the length change of a reflected wave path L/2 caused by position deviation is selected to be ignored, and the distance moved by the reflected sound wave on the transduction end surface of the transducer at the receiving end is obtained by a trigonometric function:

K＝sin2β·L/2。

component of the distance traveled by the reflected sound wave in the horizontal direction (flow direction):

△L＝K·sinα＝sin2β·L/2·sinα。

let the ultrasonic sound velocity be C, then there is the propagation time of the ultrasonic:

T＝L/C。

wherein, the ultrasonic wave is transmitted in air at 340m/s, and the laboratory can take 440 m/s.

Flow velocity of the measured medium in the horizontal direction:

V＝△L/T＝1/2C·sin2β·sinα。

it is known that the deflection angle can be determined from the known angle of incidence and the flow range of the medium to be measured.

Further, an inner wall surface between the reflecting inner wall surface 1111 and the inlet 115 is obliquely provided and extends in an oblique direction of the reflecting inner wall surface 1111; the inner wall surface between the reflection inner wall surface 1111 and the outlet 116 is inclined, and extends in the direction in which the reflection inner wall surface 1111 is inclined.

The inner wall surfaces on two axial sides of the reflection inner wall surface 1111 are also arranged in an inclined manner, and the inclined direction extends along the inclined direction of the reflection inner wall surface 1111, so that a continuous inclined surface is formed between the inlet 115 and the outlet 116, and the processing and the manufacturing and the calibration calculation of the flow of the measured medium are facilitated.

Further, the inner wall surface of the side wall further includes a transduction inner wall surface 1121, the transduction inner wall surface 1121 is located at the opposite side of the reflection inner wall surface 1111, the transduction inner wall surface 1121 is disposed in an inclined plane, one end of the transduction inner wall surface 1121 close to the inlet 115 is inclined in a direction away from the central axis 117, and one end of the transduction inner wall surface 1121 close to the outlet 116 is inclined in a direction close to the central axis 117.

The inner wall surface of the flowmeter pipe 110 where the transducer is mounted is used as the inner transducing wall surface 1121, and both the inner transducing wall surface 1121 and the inner reflecting wall surface 1111 are set to be inclined surfaces, so that a shape gradually tightened towards one end of the outlet is formed between the inner transducing wall surface 1121 and the inner reflecting wall surface 1111. The selectable transduction inner wall surface 1121 and the reflection inner wall surface 1111 are symmetrically arranged relative to the central axis 117, and the symmetrical structural design facilitates calibration calculation of the flow rate of the medium to be measured in the flowmeter pipeline 110 according to the pipeline structural design.

Considering that the transducing inner wall surface 1121 is interposed between two transducers, its side walls adjacent to the radial direction may be rounded off or disposed separately; the transducers are disposed between the side walls adjacent to the axial direction, and may be of the original structure, or may be inclined along the inner wall surface 1121 of the transducers, or may be of the planar design.

Further, the inner wall surface between the transduction inner wall surface 1121 and the inlet 115 is disposed obliquely and extends in the oblique direction of the transduction inner wall surface 1121; the inner wall surface between the transduction inner wall surface 1121 and the outlet 116 is disposed obliquely and extends in the oblique direction of the transduction inner wall surface 1121.

The entire side wall on the side of the transduction inner wall surface 1121 is set to be a forward inclined surface, which facilitates integral processing. And when the whole side wall on one side of the reflection inner wall surface 1111 is also an inclined surface, the structures are mutually symmetrical, so that the flow of the measured medium is balanced conveniently, and the flow is calibrated and measured.

Further, an included angle between the reflecting inner wall surface 1111 and the central shaft is beta, and beta is more than or equal to 0.5 degrees and less than or equal to 2 degrees.

The maximum flow in the ultrasonic flowmeter 100, the height of a flow channel in the flowmeter pipeline 110 and the incidence angle are comprehensively considered, the included angle between the reflecting inner wall surface 1111 and the central shaft is set to be between 0.5 degrees and beta is set to be between 0.5 degrees and 2 degrees, if the included angle can be selected to be between 0.5 degrees and 1 degree or 2 degrees, the diameter of the transducer is properly reduced, and the design requirement is met.

Further, the inlet 115 and/or outlet 116 are connected with channels that gradually increase in cross-sectional area in a direction away from the center of the meter conduit 110.

The cross-sectional area of the channel increases gradually in a direction away from the center of the flowmeter pipe 110, i.e., the channel is flared outwards, and flared channels are added to both the inlet 115 and the outlet 116, or one of the inlet 115 and the outlet 116 is connected with the flared channel for flow stabilization and static pressure measurement.

Further, the flowmeter conduit 110 includes a rectangular conduit having a rectangular cross-sectional area, and the reflecting inner wall surface 1111 and the transducing inner wall surface 1121 are symmetrically disposed on the side walls of the rectangular conduit on opposite sides.

The flowmeter pipeline 110 is designed as a rectangular pipeline, so that any opposite side surfaces can be conveniently selected to be used as the reflecting inner wall surface 1111 and the transduction inner wall surface 1121 respectively, and the corresponding inner wall surfaces can be conveniently processed with inclined surfaces, the shape is regular, and the calibration calculation of the flow is convenient.

Example two

FIG. 3 is a schematic block diagram of an ultrasonic flow meter according to another possible embodiment of the utility model; FIG. 4 is an exploded schematic view of an ultrasonic flow meter provided in accordance with another possible embodiment of the present invention; FIG. 5 is a diagram illustrating a first measurement scenario of the prior art; FIG. 6 is a schematic illustration of the first measurement scenario of FIG. 3; FIG. 7 is a diagram illustrating a second measurement scenario of the prior art; FIG. 8 is a schematic illustration of the second measurement scenario of FIG. 3; FIG. 9 is a diagram illustrating a third measurement scenario of the prior art; FIG. 10 is a schematic illustration of the third measurement scenario of FIG. 3; FIG. 11 is a diagram illustrating a fourth measurement scenario of the prior art; fig. 12 is a schematic diagram of a fourth measurement scenario of fig. 3.

Referring to fig. 3-12, another possible embodiment of the present invention provides an ultrasonic flow meter 100, which includes a transducer and the flow meter pipe 110 described above, where the transducer includes a first transducer 210 and a second transducer 220, the first transducer 210 and the second transducer 220 are installed at a side wall corresponding to a transducer inner wall surface 1121 of the flow meter pipe 110, a connection line between a center of the first transducer 210 and a center of the second transducer 220 is parallel to a central axis of the flow meter pipe 110, a transducer end surface of the first transducer 210 and a transducer end surface of the second transducer 220 both face to a center of a reflective inner wall surface 1111 of the flow meter pipe 110, and the transducer end surface of the first transducer 210 and the transducer end surface of the second transducer 220 are disposed at an included angle.

The flowmeter pipeline 110 is applied to the ultrasonic flowmeter 100, the first transducer 210 and the second transducer 220 are installed at the upstream and the downstream of the flowmeter pipeline 110, the facing surfaces of the transducing end surfaces of the two transducers are arranged in an inclined included angle and used for transmitting and receiving ultrasonic pulse signals in turn, and the reflecting inner wall surface 1111 falls into an area corresponding to the reflecting points of the two transducers.

Referring to fig. 5-10, combining two transducers for transmitting and receiving ultrasonic waves, a comparison graph of different measurement scenarios of the horizontal flow channel ultrasonic flowmeter 300 and the ultrasonic flowmeter 100 of the present invention (wherein, the horizontal flow channel ultrasonic flowmeter 300 is provided with a first horizontal inner side wall 311 and a second horizontal inner side wall 312 which are opposite, both inner side walls are horizontally arranged, the first horizontal inner side wall 311 is provided with a reflective inner wall surface, and the transducer is installed at one side of the second horizontal inner side wall 312), it can be known that by setting the reflective inner wall surface 1111 as an inclined surface at one end of the outlet 116 close to the central axis 117, the receiving point can be biased toward the center in each usage scenario. In fig. 5 to 10, the flow direction is indicated by hollow arrows, the propagation direction of the ultrasonic wave is indicated by solid arrows, the propagation path of the ultrasonic wave at a minute flow rate is indicated by a broken line, and the propagation path of the ultrasonic wave at a large flow rate is indicated by a solid line.

Referring to fig. 5 and 6, when the measured medium is at a small flow rate and the ultrasonic wave is transmitted in the forward direction (the first transducer 210 transmits the ultrasonic wave and the second transducer 220 receives the ultrasonic wave), the receiving point falls into the center of the second transducer 220 when the horizontal flow channel ultrasonic flowmeter 300 propagates; when the ultrasonic flowmeter 100 of the present invention is propagating, the incident angle decreases due to the deflection of the reflecting inner wall 1111, and the counterclockwise deflection of the receiving point falls substantially to the left of the center of the second transducer 220.

Referring to fig. 7 and 8, when the measured medium is at a large flow rate and the ultrasonic wave is transmitted in the forward direction (where the dotted line in fig. 7 indicates the propagation path of the ultrasonic wave at a small flow rate under the same condition), the incidence angle increases due to the pushing of the measured medium when the horizontal flow channel ultrasonic flowmeter 300 propagates, and the receiving point falls substantially to the right of the center of the second transducer 220; when the ultrasonic flowmeter 100 of the present invention is propagating, the incident angle decreases due to the deflection of the reflecting inner wall 1111, and the counterclockwise deflection of the receiving point substantially falls within the center of the second transducer 220 and the center is shifted to the right.

Referring to fig. 9 and 10, when the measured medium is at a small flow rate and the ultrasonic wave is reversely emitted (the second transducer 220 emits the ultrasonic wave and the first transducer 210 receives the ultrasonic wave), the receiving point falls into the center of the first transducer 210 when the horizontal flow channel ultrasonic flowmeter 300 propagates; when the ultrasonic flowmeter 100 of the present invention propagates, the incident angle increases due to the deflection of the reflecting inner wall surface 1111, and the counterclockwise deflection of the receiving point substantially falls to the left of the center of the first transducer 210.

Referring to fig. 11 and 12, when the measured medium is at a large flow rate and the ultrasonic wave is reversely emitted (where the dotted line in fig. 12 indicates the propagation path of the ultrasonic wave at a small flow rate under the same condition), when the horizontal flow channel ultrasonic flowmeter 300 propagates, the incidence angle decreases due to the pushing of the measured medium, and the receiving point falls substantially to the right of the center of the first transducer 210; when the ultrasonic flowmeter 100 of the present invention is propagating, the incident angle increases due to the deflection of the reflecting inner wall 1111, and the counterclockwise deflection of the receiving point substantially falls into the center of the first transducer 210 and the center is shifted to the right.

The ultrasonic flowmeter 100 of the embodiment includes a transducer and a flowmeter pipe 110, wherein the flowmeter pipe 110 has a reflecting inner wall surface 1111 as an inclined surface, and the reflecting inner wall surface 1111 is inclined from one end of an inlet 115 to one end of an outlet 116 and is biased in a direction approaching a central axis 117, when ultrasonic waves propagate in a flow direction, an incident angle is reduced, when ultrasonic waves propagate in a reverse direction in the flow direction, the incident angle is increased, a receiving point can be biased towards the center, a total receiving area falls into the vicinity of the center of the transducer, the diameter of the transducer is reduced, and the cost and the energy consumption are reduced. The ultrasonic flow meter includes a transducer and the flow meter conduit 110 described above with the same benefits.

Further, the included angle between the transducing end face of the first transducer 210 and the transducing end face of the second transducer 220 is γ, and γ is greater than or equal to 90 ° and less than or equal to 120 °.

The included angle between the transduction end faces of the first transducer 210 and the second transducer 220 is set, so that ultrasonic waves can be transmitted and received between the two transducers in turn conveniently, and the area of the transduction end faces can be reasonably utilized.

Further, the transducer is mounted to the flow meter conduit 110 by a wedge tube; the wedge tubes include a first wedge tube 121 and a second wedge tube 122; the first end of the first wedge tube 121 and the first end of the second wedge tube 122 are integrally connected to the flowmeter conduit 110, and both the first wedge tube 121 and the second wedge tube 122 are communicated with the flowmeter conduit; a first transducer 210 is mounted to a second end of the first wedge tube 121 and a second transducer 220 is mounted to a second end of the second wedge tube 122.

As shown in fig. 3 and 4, the flowmeter pipe 110 has a rectangular pipe structure and is surrounded by a first side wall 111, a third side wall 113, a second side wall 112, and a fourth side wall 114. The first side wall 111 and the second side wall 112 are oppositely arranged, the third side wall 113 and the fourth side wall 114 are oppositely arranged, the inner side surface of the first side wall 111 serves as a reflecting surface, and the second side wall 112 is connected with a first wedge-shaped tube 121 and a second wedge-shaped tube 122. The first wedge-shaped pipe 121 and the second wedge-shaped pipe 122 are arranged along the axial direction of the rectangular pipeline, the first wedge-shaped pipe 121 is close to the inlet side of the rectangular pipeline, and the second wedge-shaped pipe 122 is close to the outlet side of the rectangular pipeline. The opening of the first wedge-shaped pipe 121 is obliquely upward arranged near one end of the rectangular pipeline inlet, the opening of the second wedge-shaped pipe 122 is obliquely upward arranged near one end of the rectangular pipeline outlet, and the included angle between the central axes of the first wedge-shaped pipe 121 and the second wedge-shaped pipe 122 is 120 degrees. The first transducer 210 and the second transducer 220 are correspondingly installed at the openings of the first wedge-shaped tube 121 and the second wedge-shaped tube 122, respectively. The rectangular pipes are integrally connected through the wedge-shaped pipes, so that the processing and manufacturing are convenient, and the stable installation of the first transducer 210 and the second transducer 220 can be realized.

In the description of the present invention, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection through intervening media, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the embodiments of the present invention in its spirit.

Claims (10)

1. A flowmeter conduit comprising an inlet, an outlet, and a sidewall;

the inner wall surface of the side wall comprises a reflection inner wall surface, and the reflection inner wall surface comprises a reflection point falling area of the ultrasonic wave;

the reflecting inner wall surface is arranged in an inclined plane, one end of the reflecting inner wall surface, which is close to the inlet, inclines towards the direction far away from the central shaft of the flowmeter pipeline, and one end of the reflecting inner wall surface, which is close to the outlet, inclines towards the direction close to the central shaft.

2. The flowmeter conduit according to claim 1, wherein an inner wall surface between the reflecting inner wall surface and the inlet is provided obliquely and extends in an oblique direction of the reflecting inner wall surface; the inner wall surface between the reflecting inner wall surface and the outlet is obliquely arranged and extends along the oblique direction of the reflecting inner wall surface.

3. The flowmeter conduit of claim 1, wherein the inner wall surface of the sidewall further comprises a transducing inner wall surface located on an opposite side of the reflecting inner wall surface, the transducing inner wall surface being disposed on an inclined plane, an end of the transducing inner wall surface near the inlet being inclined in a direction away from the central axis, and an end of the transducing inner wall surface near the outlet being inclined in a direction near the central axis.

4. The flowmeter conduit of claim 3, wherein the inner wall surface between the transducing inner wall surface and the inlet is disposed obliquely and extends in an oblique direction of the transducing inner wall surface; the inner wall surface between the energy conversion inner wall surface and the outlet is obliquely arranged and extends along the oblique direction of the energy conversion inner wall surface.

5. The flowmeter conduit of any one of claims 1-4, wherein the angle between the reflective inner wall surface and the central axis is β, 0.5 ° β 2 °.

6. The flowmeter conduit of any one of claims 1-4, wherein a channel is connected to the inlet and/or the outlet, the channel having a cross-sectional area that gradually increases in a direction away from the center of the flowmeter conduit.

7. The flowmeter conduit of any of claims 3 or 4, wherein the flowmeter conduit comprises a rectangular conduit having a rectangular cross-section, and wherein the reflective interior wall surface and the transduction interior wall surface are symmetrically disposed on opposite side walls of the rectangular conduit.

8. An ultrasonic flow meter, characterized in that, includes the transducer and the flowmeter pipeline of any one of claims 1-7, the transducer includes first transducer and second transducer, first transducer with the second transducer install in the lateral wall department that the transducing internal face of flowmeter pipeline corresponds, the line between the center of first transducer with the center of second transducer is on a parallel with the center pin of flowmeter pipeline, the transducing terminal surface of first transducer with the transducing terminal surface of second transducer all towards the center of the reflection internal face of flowmeter pipeline, just the transducing terminal surface of first transducer with the transducing terminal surface of second transducer is the contained angle setting.

9. The ultrasonic flow meter of claim 8, wherein the included angle between the transducing end face of the first transducer and the transducing end face of the second transducer is γ, 90 ° ≦ γ ≦ 120 °.

10. The ultrasonic flow meter of claim 8, wherein the transducer is mounted to the flow meter conduit by a wedge tube;

the wedge-shaped pipe comprises a first wedge-shaped pipe and a second wedge-shaped pipe;

the first end of the first wedge-shaped pipe and the first end of the second wedge-shaped pipe are both integrally connected to the flowmeter pipeline, and the first wedge-shaped pipe and the second wedge-shaped pipe are both communicated with the flowmeter pipeline;

the first transducer is mounted to the second end of the first wedge tube and the second transducer is mounted to the second end of the second wedge tube.

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