阅读说明：本技术 一种壳体可延伸的防冰冻超声波流量计 (Anti-freezing ultrasonic flowmeter with extensible shell ) 是由 严军荣 卢玉龙 宋财华 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种壳体可延伸的防冰冻超声波流量计,包括超声波流量计壳体、超声波换能器、超声波换能器下方的反射片及反射片支架,其特征在于：所述超声波流量计壳体包含向内弯曲部分,所述向内弯曲部分受到冰冻挤压时向外延伸,所述反射片支架部署调节装置,当壳体向外延伸时调节装置对反射片的位置进行调整。本发明解决了超声波流量计如何避免或减少超声波反射片被冰冻时计量精度受到影响的问题。(The invention discloses an anti-freezing ultrasonic flowmeter with an extensible shell, which comprises an ultrasonic flowmeter shell, an ultrasonic transducer, a reflector plate and a reflector plate bracket, wherein the reflector plate and the reflector plate bracket are arranged below the ultrasonic transducer, and the anti-freezing ultrasonic flowmeter is characterized in that: the ultrasonic flowmeter shell comprises an inward bending part, the inward bending part extends outwards when being squeezed by freezing, the reflector plate support is provided with an adjusting device, and the adjusting device adjusts the position of the reflector plate when the shell extends outwards. The invention solves the problem of how to avoid or reduce the influence on the measurement accuracy when the ultrasonic wave reflecting sheet is frozen in the ultrasonic wave flowmeter.)

1. The utility model provides an anti-freezing ultrasonic flowmeter that casing can extend, includes ultrasonic flowmeter casing, ultrasonic transducer, reflector plate and reflector plate support of ultrasonic transducer below, its characterized in that: the ultrasonic flowmeter shell comprises an inward bending part, the inward bending part extends outwards when being squeezed by freezing, the reflector plate support is provided with an adjusting device, and the adjusting device adjusts the position of the reflector plate when the shell extends outwards.

2. The extendable anti-icing ultrasonic flow meter housing of claim 1, wherein the location of the inwardly curved portion in the flow meter is a symmetrical location within the ultrasonic metering area.

3. The extendable anti-icing ultrasonic flow meter of claim 1, wherein the location of the inwardly curved portion in the flow meter is one or more locations of the non-metering area.

4. The extendable anti-freezing ultrasonic flowmeter of claim 1, wherein the material of the inwardly bent portion is an elastically recoverable material; the degree of bending of the inwardly bent portion is determined according to any one or more of the combination of the maximum expandability of the wristwatch case, the structure of the ultrasonic reflector and the reflector holder in the wristwatch case, and the maximum expansion volume of water during freezing; the inward curved portion may extend outwardly when subjected to freezing pressure, and may include multiple outward extensions of the inward curved portion and/or the inward curved portion may extend outwardly in its entirety after reaching the generally flat position.

5. The extendable anti-freezing ultrasonic flowmeter of claim 1, wherein the adjusting means is connected to the reflector bracket by any one or more of clamping, gluing, welding, fitting, and threading; the mode that the adjusting device adjusts the position of the reflector plate comprises any one or more of rotating the adjusting device to change the angle of the reflector plate bracket, translating the adjusting device to change the position of the reflector plate bracket, and wrapping and extruding the reflector plate bracket by the adjusting device.

6. The extendable freeze protected ultrasonic flowmeter of claim 1, wherein said means for adjusting adjusts the position of the reflector plate as the case is extended, comprising the steps of:

when the shell extends outwards, acquiring the angle change of the ultrasonic reflector plate and/or displacement data of the ultrasonic reflector plate;

calculating an abnormal index of the ultrasonic reflector according to the angle change value of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector;

calculating an abnormal tolerance value according to the ultrasonic wave receiving range and/or the receiving capacity of the ultrasonic transducer;

and when the abnormal index of the ultrasonic reflector is larger than the abnormal allowable value, calculating the angle and/or displacement of the ultrasonic reflector to be adjusted according to the difference value between the abnormal index and the abnormal allowable value, and adjusting.

7. The extendable freeze protected ultrasonic flowmeter of claim 6, wherein the angular change of said ultrasonic reflectors is: any one of an angle change value of the ultrasonic reflection sheet caused by movement of the reflection sheet support corresponding to extension of the housing is calculated according to the connection relationship between the housing and the ultrasonic reflection sheet support, an angle change value of the ultrasonic reflection sheet is calculated according to a distance between a position at which the detection sound wave vertically emitted to the ultrasonic reflection sheet is received and the original position, and an angle change value of the ultrasonic reflection sheet is calculated according to the connection relationship between the housing and the ultrasonic reflection sheet support and a position at which the detection sound wave vertically emitted to the ultrasonic reflection sheet is received.

8. The extendable anti-freezing ultrasonic flowmeter of claim 6, wherein the displacement data of the ultrasonic reflector is any one or more of a horizontal position change value within a preset time period of the ultrasonic reflector holder, a vertical position change value within a preset time period of the ultrasonic reflector holder, and a relative position change value within a preset time period of the ultrasonic reflector holder and the ultrasonic reflector.

9. The extendable anti-freezing ultrasonic flowmeter of claim 6, wherein the calculating of the abnormality index of the ultrasonic reflector based on the angle change value of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector is: any one of an abnormality index of the ultrasonic wave reflecting sheet calculated from an influence of the angular change of the ultrasonic wave reflecting sheet on the reception of the ultrasonic wave, an abnormality index of the ultrasonic wave reflecting sheet calculated from an influence of the displacement of the ultrasonic wave reflecting sheet on the reception of the ultrasonic wave, and an abnormality index of the ultrasonic wave reflecting sheet calculated from an influence of the angular change and the displacement of the ultrasonic wave reflecting sheet on the reception of the ultrasonic wave.

10. The extendable anti-freezing ultrasonic flowmeter of claim 6, wherein the calculating of the abnormal tolerance according to the ultrasonic wave receiving range and/or the receiving capability of the ultrasonic transducer is: any one of calculating the maximum deflection angle of the ultrasonic reflection sheet according to the ultrasonic wave receiving range of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle, calculating the maximum attenuation value of the ultrasonic wave according to the receiving capacity of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle and the maximum attenuation value of the ultrasonic wave.

Technical Field

The invention belongs to the technical field of intelligent ultrasonic flowmeters, and particularly relates to an anti-freezing ultrasonic flowmeter with an extensible shell.

Background

The anti-freezing technology of the ultrasonic measurement pipe section in the current market mainly adopts the thickened wall thickness of the pipe section and the reinforced locking force of a pressure plate of a transducer, so that the pipe section and the transducer cannot burst when the pipe section is frozen. For example, chinese patent "an anti-freezing ultrasonic water meter pipe section" with publication number CN210051391U proposes that a water discharge hole is additionally formed in a side wall of a measurement pipe section of an ultrasonic meter, a water inlet of the water discharge hole is communicated with the inside of the measurement pipe section, a water outlet of the water discharge hole is provided with a water discharge assembly, the water discharge assembly includes a water discharge plug and an elastic member, one end of the water discharge plug is abutted against the water outlet, and the other end of the water discharge plug is abutted against the elastic member.

However, even if the pipe section and the transducer do not burst, the expanded structure may cause the measurement surface of the transducer to be deformed or damaged due to the strong pressure, thereby affecting the measurement accuracy of the ultrasonic waves. At present, no ultrasonic flowmeter capable of effectively avoiding or reducing influence on measurement accuracy when an ultrasonic reflector is frozen exists, and therefore an anti-freezing ultrasonic flowmeter with an extensible shell is provided.

Disclosure of Invention

In order to solve the above problems, the present invention provides an anti-freezing ultrasonic flowmeter with an extendable casing.

The invention relies on monitoring sensors deployed within an ultrasonic flow meter.

The invention discloses an anti-freezing ultrasonic flowmeter with an extensible shell, which comprises an ultrasonic flowmeter shell, an ultrasonic transducer, a reflector plate and a reflector plate bracket, wherein the reflector plate and the reflector plate bracket are arranged below the ultrasonic transducer, and the anti-freezing ultrasonic flowmeter is characterized in that:

the ultrasonic flowmeter shell comprises an inward bending part, the inward bending part extends outwards when being squeezed by freezing, the reflector plate support is provided with an adjusting device, and the adjusting device adjusts the position of the reflector plate when the shell extends outwards.

Preferably, the location of the inwardly curved portion in the flow meter is a symmetrical location within the ultrasonic metering region.

Preferably, the location of the inwardly curved portion in the flow meter is one or more locations of the non-metering region.

Preferably, the material of the inwardly bent portion is an elastically restorable material; the degree of bending of the inwardly bent portion is determined according to any one or more of the combination of the maximum expandability of the wristwatch case, the structure of the ultrasonic reflector and the reflector holder in the wristwatch case, and the maximum expansion volume of water during freezing; the inward curved portion may extend outwardly when subjected to freezing compression, including multiple outward extensions of the inward curved portion and/or the inward curved portion may extend outwardly in its entirety after reaching the generally flat position.

Preferably, the connection mode of the adjusting device and the reflector bracket comprises any one or more of clamping, gluing, welding, tight fitting and screw thread; the mode that the adjusting device adjusts the position of the reflector plate comprises any one or more of rotating the adjusting device to change the angle of the reflector plate bracket, translating the adjusting device to change the position of the reflector plate bracket, and wrapping and extruding the reflector plate bracket by the adjusting device.

Preferably, the adjusting device adjusts the position of the reflection sheet when the housing extends outward, and includes the steps of:

when the shell extends outwards, acquiring the angle change of the ultrasonic reflector plate and/or displacement data of the ultrasonic reflector plate;

calculating an abnormal index of the ultrasonic reflector according to the angle change value of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector;

calculating an abnormal tolerance value according to the ultrasonic wave receiving range and/or the receiving capacity of the ultrasonic transducer;

and when the abnormal index of the ultrasonic reflector is larger than the abnormal allowable value, calculating the angle and/or displacement of the ultrasonic reflector to be adjusted according to the difference value between the abnormal index and the abnormal allowable value, and adjusting.

Further preferably, the angle change of the ultrasonic reflector is: any one of an angle change value of the ultrasonic reflection sheet caused by movement of the reflection sheet support corresponding to extension of the housing is calculated according to the connection relationship between the housing and the ultrasonic reflection sheet support, an angle change value of the ultrasonic reflection sheet is calculated according to a distance between a position at which the detection sound wave vertically emitted to the ultrasonic reflection sheet is received and the original position, and an angle change value of the ultrasonic reflection sheet is calculated according to the connection relationship between the housing and the ultrasonic reflection sheet support and a position at which the detection sound wave vertically emitted to the ultrasonic reflection sheet is received.

Further preferably, the displacement data is any one or more combination of a horizontal position change value within a preset time period of the ultrasonic reflector holder, a vertical position change value within a preset time period of the ultrasonic reflector holder, and a relative position change value within a preset time period of the ultrasonic reflector and the ultrasonic reflector holder.

Further preferably, the calculating of the abnormality index of the ultrasonic wave reflecting sheet according to the angle change value of the ultrasonic wave reflecting sheet and/or the displacement data of the ultrasonic wave reflecting sheet is: any one of an abnormality index of the ultrasonic wave reflecting sheet calculated from an influence of the angular change of the ultrasonic wave reflecting sheet on the reception of the ultrasonic wave, an abnormality index of the ultrasonic wave reflecting sheet calculated from an influence of the displacement of the ultrasonic wave reflecting sheet on the reception of the ultrasonic wave, and an abnormality index of the ultrasonic wave reflecting sheet calculated from an influence of the angular change and the displacement of the ultrasonic wave reflecting sheet on the reception of the ultrasonic wave.

Further preferably, the calculating of the abnormality tolerance according to the ultrasonic wave receiving range and/or the receiving capability of the ultrasonic transducer is: any one of calculating the maximum deflection angle of the ultrasonic reflection sheet according to the ultrasonic wave receiving range of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle, calculating the maximum attenuation value of the ultrasonic wave according to the receiving capacity of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle and the maximum attenuation value of the ultrasonic wave.

The invention has the advantages that:

(1) when the pipe is extruded by freezing, the inward bending part arranged at the non-metering pipe section extends outwards, and an expansion space is reserved for the internal freezing expansion during freezing, so that the freezing fracture is effectively prevented.

(2) When the ultrasonic wave.

(3) When the structure of the ultrasonic reflector is extruded in the water meter through freezing expansion, the position and/or the angle of the reflector are adjusted according to the angle change value and/or the displacement data of the ultrasonic reflector, so that the reduction of the metering precision caused by the change of the state of the ultrasonic reflector is avoided.

Drawings

FIG. 1 is a schematic diagram of an anti-icing ultrasonic flow meter with inward curving non-metering regions according to an embodiment of the invention;

FIG. 2 is a schematic view of an anti-freeze ultrasonic flow meter with an inwardly curved metering region according to an embodiment of the present invention;

fig. 3 is a flowchart illustrating a step of adjusting the position of the reflective sheet by the adjusting device when the housing is extended outward according to an embodiment of the present invention.

Detailed Description

The following describes in detail preferred embodiments of the present invention.

The invention relies on monitoring sensors deployed in a flowmeter, and comprises one or more test sound wave transmitting and receiving devices deployed right above an ultrasonic reflector, displacement sensors deployed on an ultrasonic reflector bracket, laser detectors deployed on the side of the ultrasonic reflector, vibration sensors deployed on the ultrasonic reflector bracket and the like.

The embodiment of the anti-freezing ultrasonic flowmeter with the extendable shell is shown in figure 1 in a schematic structural diagram, and comprises an ultrasonic flowmeter shell (1), an ultrasonic transducer (2), a reflector plate and a reflector plate bracket (3) below the ultrasonic transducer, and is characterized in that:

the ultrasonic flowmeter casing comprises an inward bending part (4) which extends outwards when being squeezed by freezing, and the reflector plate support is provided with an adjusting device (5) which adjusts the position of the reflector plate when the casing extends outwards.

Preferably, the location of the inwardly curved portion in the flow meter is one or more locations of the non-metering region. In the ultrasonic flow meter configuration shown in fig. 1, the positions of the inwardly curved portions (4) in the flow meter are two positions in the non-metering region of the flow meter near the left end.

In another preferred embodiment, the location of the inward curved portion in the flow meter is a symmetrical location within the ultrasonic metering region. In the ultrasonic flow meter structure shown in fig. 2, the position of the inward bent portion (4) in the flow meter is a symmetrical position within the flow meter measuring region (the region where the ultrasonic reflector holder is located).

Preferably, the material of the inwardly bent portion is an elastically restorable material.

Preferably, the degree of bending of the inwardly bent portion is determined according to any one or more of the combination of the maximum expandability of the wristwatch case, the structure of the ultrasonic reflector and the reflector holder in the wristwatch case, and the maximum expansion volume of water upon freezing. Wherein the determination of the degree of bending of the inwardly bent portion based on the maximum expansible ability of the wristwatch case means that the maximum range over which the case can be extended is taken as the degree of bending of the inwardly bent portion, the determination of the degree of bending of the inwardly bent portion based on the structures of the ultrasonic wave reflecting sheet and the sheet holder in the wristwatch case means that the degree of bending of the inwardly bent portion is determined without touching the structures of the ultrasonic wave reflecting sheet and the sheet holder in the wristwatch case, and the determination of the degree of bending of the inwardly bent portion based on the maximum expansion volume of water during freezing means that the maximum expansion volume formed by the degree of bending of the inwardly bent portion can accommodate water during freezing. The multiple combination determination is based on extrema and/or averages and/or products and/or summations between the individual calculations.

The inward curved portion may extend outwardly when subjected to freezing compression, including multiple outward extensions of the inward curved portion and/or the inward curved portion may extend outwardly in its entirety after reaching the generally flat position. The inward bending part extends outwards in multiple stages, namely the inward concave arc-shaped bending part extends outwards in different degrees according to different freezing levels, and the freezing level of the water meter can be identified according to different ranges in which the inward concave arc-shaped bending part extends outwards; the fact that the inward bending portion extends to the integral gentle position and then the shell extends outwards integrally means that when the inward bending portion is squeezed by freezing, the inward bending portion extends outwards to the position smoothly connected with the adjacent portion, and then the water meter extends outwards integrally.

Preferably, the connection mode of the adjusting device and the reflector bracket comprises any one or more of clamping, gluing, welding, tight fitting and screw thread.

Preferably, the adjusting means for adjusting the reflector holder includes any one or more of rotating the adjusting means to change the angle of the reflector holder, translating the adjusting means to change the position of the reflector holder, and wrapping and pressing the adjusting means around the reflector holder. In this embodiment, the adjusting device (4) is a knob device and/or a push-pull device and/or a wrapping device connected with the reflector bracket, and the reflector bracket is adjusted by any one or more of rotary extrusion, translational extrusion and wrapping extrusion.

Preferably, the adjusting device adjusts the position of the reflector plate when the housing extends outward, and the flowchart is shown in fig. 3, and includes the steps of:

when the shell extends outwards, acquiring the angle change of the ultrasonic reflector plate and/or displacement data of the ultrasonic reflector plate;

calculating an abnormal index of the ultrasonic reflector according to the angle change value of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector;

calculating an abnormal tolerance value according to the ultrasonic wave receiving range and/or the receiving capacity of the ultrasonic transducer;

and when the abnormal index of the ultrasonic reflector is larger than the abnormal allowable value, calculating the angle and/or displacement of the ultrasonic reflector to be adjusted according to the difference value between the abnormal index and the abnormal allowable value, and adjusting.

The angle change of the ultrasonic reflector is obtained by: any one of an angle change value of the ultrasonic reflection sheet caused by movement of the reflection sheet support corresponding to extension of the housing is calculated according to the connection relationship between the housing and the ultrasonic reflection sheet support, an angle change value of the ultrasonic reflection sheet is calculated according to a distance between a position at which the detection sound wave vertically emitted to the ultrasonic reflection sheet is received and the original position, and an angle change value of the ultrasonic reflection sheet is calculated according to the connection relationship between the housing and the ultrasonic reflection sheet support and a position at which the detection sound wave vertically emitted to the ultrasonic reflection sheet is received.

Table a, a1 through A3, shows various embodiments of calculating the angle change value of the ultrasonic wave reflection sheet, wherein table a relates to the connection relationship between the housing and the ultrasonic wave reflection sheet holder, the position at which the detection sound wave emitted perpendicularly to the ultrasonic wave reflection sheet is received, and the like.

TABLE A different embodiments for calculating the value of the angular variation of the ultrasonic reflectors

The displacement data comprises any one or more of a horizontal position change value within a preset time period of the ultrasonic reflector bracket, a vertical position change value within a preset time period of the ultrasonic reflector bracket, and a relative position change value within a preset time period of the ultrasonic reflector and the ultrasonic reflector bracket. The term combination is extreme value and/or average value and/or product and/or summation among the terms.

The calculating of the abnormal index of the ultrasonic reflector according to the angle change value of the ultrasonic reflector and/or the displacement data of the ultrasonic reflector is as follows: any one of an abnormality index of the ultrasonic wave reflecting sheet calculated from an influence of the angular change of the ultrasonic wave reflecting sheet on the reception of the ultrasonic wave, an abnormality index of the ultrasonic wave reflecting sheet calculated from an influence of the displacement of the ultrasonic wave reflecting sheet on the reception of the ultrasonic wave, and an abnormality index of the ultrasonic wave reflecting sheet calculated from an influence of the angular change and the displacement of the ultrasonic wave reflecting sheet on the reception of the ultrasonic wave.

B1-B3 in table B refer to different embodiments for calculating the abnormality index of the ultrasonic wave reflecting sheet, wherein the angle change value and the displacement data of the ultrasonic wave reflecting sheet are referred to in table B.

TABLE B different embodiments for calculating the anomaly index of an ultrasonic reflector

The calculation of the abnormal tolerance value according to the ultrasonic wave receiving range and/or the receiving capacity of the ultrasonic transducer is as follows: any one of calculating the maximum deflection angle of the ultrasonic reflection sheet according to the ultrasonic wave receiving range of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle, calculating the maximum attenuation value of the ultrasonic wave according to the receiving capacity of the ultrasonic transducer and calculating the abnormal allowable value based on the maximum deflection angle and the maximum attenuation value of the ultrasonic wave.

C1 to C3 in table C show different embodiments of calculating the abnormality tolerance, in which data such as the ultrasonic wave reception range and the reception capability of the ultrasonic transducer are referred to in table C.

TABLE C different embodiments for calculating anomaly tolerance values

Calculating the angle and/or displacement of the ultrasonic reflector to be adjusted according to the difference value between the abnormal index and the abnormal allowable value, and adjusting the angle and/or displacement, wherein the method comprises the following steps:

calculating the difference value between the abnormal index and the abnormal allowable value of the ultrasonic reflector;

calculating an angle change value and/or displacement data of the ultrasonic reflector corresponding to the difference value according to the relation between the abnormal index of the ultrasonic reflector and the angle change value and/or displacement data of the ultrasonic reflector, namely the angle change value and/or displacement of the ultrasonic reflector needing to be adjusted;

the ultrasonic wave transmitting sheet or the ultrasonic wave reflecting sheet bracket is extruded to a corresponding angle and/or position according to the angle change value and/or displacement of the ultrasonic wave reflecting sheet which is adjusted as required.

In a preferred embodiment, the abnormality index x of the ultrasonic reflection sheet is 2 according to B3 in table B, the abnormality tolerance y is 1.8 according to C3 in table C, when the abnormality index x of the ultrasonic reflection sheet is greater than the abnormality tolerance y, the difference z is 0.2, the angle of the ultrasonic reflection sheet corresponding to the difference z is 1 × 0.2 to 0.2 degrees (r1 is 1) according to the functional relationship x of the angle v of the ultrasonic reflection sheet and the abnormality index x of the ultrasonic reflection sheet in B1 in table B and r1 v, the angle of the ultrasonic reflection sheet to be adjusted is 0.2 degrees, and the angle of the ultrasonic reflection sheet or the ultrasonic reflection sheet holder to be adjusted is 0.2 degrees according to the angle of the ultrasonic reflection sheet to be adjusted.

In another preferred embodiment, the abnormality index x of the ultrasonic reflection sheet is 2 according to B3 in table B, and the allowable abnormality value y is 1.8 according to C3 in table C, where the abnormality index x of the ultrasonic reflection sheet is>The difference z is 0.2, and the functional relation x between the displacement m of the ultrasonic reflection sheet and the abnormality index x of the ultrasonic reflection sheet in B2 in Table B is r5 m^r6Calculating the displacement of the ultrasonic reflector corresponding to the difference z as r5 & 0.2^r6The displacement of the ultrasonic reflection sheet to be adjusted is 0.32 cm (r5 is 8, r6 is 2), and the ultrasonic emission sheet or the reflection sheet support is adjusted to a corresponding position according to the displacement of the ultrasonic reflection sheet to be adjusted of 0.32 cm.

Of course, those skilled in the art should realize that the above embodiments are only used for illustrating the present invention, and not as a limitation to the present invention, and that the changes and modifications of the above embodiments will fall within the protection scope of the present invention as long as they are within the scope of the present invention.