CN-121994321-A - Anti-freezing ultrasonic water meter pipe section structure and ultrasonic water meter

CN121994321ACN 121994321 ACN121994321 ACN 121994321ACN-121994321-A

Abstract

The invention discloses an antifreezing ultrasonic water meter pipe section structure and an ultrasonic water meter, comprising an ultrasonic water meter pipe section, wherein the surface of the ultrasonic water meter pipe section is provided with an antifreezing hole and a transducer mounting hole; the ultrasonic water meter comprises an ultrasonic water meter pipe section, an anti-freezing mechanism, a first energy converter, a second energy converter, a lining pipe, a reflecting piece and a central reflecting piece, wherein the anti-freezing mechanism is arranged in an anti-freezing hole of the ultrasonic water meter pipe section through threads, the lining pipe is nested in the ultrasonic water meter pipe section, a through hole is formed in the top of the lining pipe, and the reflecting piece comprises a first reflecting piece, a second reflecting piece and a central reflecting piece. The invention has excellent anti-freezing performance by arranging the anti-freezing mechanism, the reliability of the whole machine is high, the cross section of the inner liner tube is rectangular, the emitting surface of the transducer is flush with the inner surface of the inner liner tube, the interference of the protruding transducer on the flow field is eliminated, the generation of vortex is effectively avoided, and the invention is beneficial to improving the metering precision and the measuring stability.

Inventors

WANG ZHIFENG
WANG QINGLONG
XU HAITAO

Assignees

北京声链科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260331

Claims (12)

1. An anti-freezing ultrasonic water meter pipe section structure, which is characterized by comprising: An ultrasonic water meter pipe section, wherein M antifreezing holes and Y transducer mounting holes are formed in the surface of the ultrasonic water meter pipe section; the anti-freezing mechanism is arranged in an anti-freezing hole of the ultrasonic water meter pipe section through threads; A first transducer for transmitting or receiving ultrasonic waves; A second transducer for receiving or transmitting ultrasonic waves; The lining tube is nested in the ultrasonic water meter tube section, and N through holes are formed in the top of the lining tube; The reflecting piece comprises a first reflecting piece, a second reflecting piece and a central reflecting piece, wherein the first reflecting piece and the second reflecting piece are respectively matched with the first transducer and the second transducer and are positioned on the right opposite sides of the first transducer and the second transducer, and the central reflecting piece is positioned on the same side of the first transducer and the second transducer.
2. The anti-freezing ultrasonic water meter pipe section structure of claim 1, wherein the anti-freezing mechanism comprises an anti-freezing bin, an elastic element and a limiting piece, the anti-freezing bin comprises an anti-freezing cover and an anti-freezing cavity, the anti-freezing cover is fixedly connected with the anti-freezing cavity, the limiting piece is cylindrical, a cylindrical accommodating cavity is axially formed in the lower end face of the limiting piece, one end of the elastic element is accommodated in the accommodating cavity, a protruding portion is arranged on the upper end face of the limiting piece, a through hole is correspondingly formed in the anti-freezing cover, and the protruding portion is inserted into the through hole to form plug-in fit.
3. The anti-freezing ultrasonic water meter pipe section structure according to claim 2, wherein an annular sealing groove is formed in the circumferential side wall of the limiting piece, an O-shaped sealing ring is embedded in the annular sealing groove, and the O-shaped sealing ring is in sealing abutting connection with the inner wall of the anti-freezing cavity.
4. The anti-freezing type ultrasonic water meter pipe section structure according to claim 2 is characterized in that the anti-freezing cover is fixedly connected with the anti-freezing cavity through threads, an annular sealing groove is formed in the lower end face of the anti-freezing cover, and a sealing ring is arranged in the annular sealing groove and is in sealing abutting connection with the end face of the anti-freezing cavity.
5. The anti-freezing ultrasonic water meter tube segment structure according to claim 3 or 4, wherein the first reflecting member and the second reflecting member are respectively fixed to the bottom surface of the inner liner tube, and the central reflecting sheet is fixed to the top of the inner liner tube.
6. The antifreezing ultrasonic water meter pipe section structure according to claim 5, wherein the cross section of the lining pipe is rectangular, the number N of through holes at the top of the lining pipe is more than or equal to 2, the first transducer and the second transducer are respectively fixedly installed in the transducer installation holes, and the emitting surfaces of the first transducer and the second transducer penetrate through the through holes and are flush with the inner surface of the lining pipe.
7. The anti-freezing ultrasonic water meter tube section structure of claim 6, wherein the inner lining tube comprises a first part and a second part which are axially symmetrical, the first reflecting part and the second reflecting part are both in a disc shape, two clamping parts protruding outwards in the radial direction are arranged at the edges of the first reflecting part and the second reflecting part, a first positioning hole and a second positioning hole are formed in the inner walls of the first part and the second part of the inner lining tube, the clamping parts are embedded in the corresponding positioning holes, the central reflecting plate is rectangular, a third clamping groove and a fourth clamping groove are formed in the inner walls of the first part and the second part of the inner lining tube, and the central reflecting plate is inserted in the corresponding clamping grooves.
8. The anti-freezing ultrasonic water meter pipe section structure of claim 7, wherein a radial sealing structure is arranged between the lining pipe and the ultrasonic water meter pipe section, the radial sealing structure comprises an annular bearing part and an elastic sealing ring, the annular bearing part is arranged on the outer wall of the lining pipe, an annular groove is formed in the surface of the annular bearing part, and the elastic sealing ring is embedded in the annular groove.
9. The antifreeze type ultrasonic water meter pipe section structure according to claim 8, further comprising a rectifying grating, wherein the rectifying grating is mounted at the water inlet and/or the water outlet of the ultrasonic water meter pipe section.
10. The antifreezing ultrasonic water meter pipe section structure of claim 9, further comprising a transducer pressing plate and a PCB box, wherein the transducer pressing plate is fixed with the ultrasonic water meter pipe section through a bolt, a PCB is installed in the PCB box, a part of the transducer pressing plate is inserted into the PCB box, and the transducer is electrically connected with the PCB.
11. The anti-freezing ultrasonic water meter pipe section structure according to claim 1, wherein the number M of the anti-freezing holes is more than or equal to 1, and the number Y of the transducer mounting holes is more than or equal to 2.
12. An ultrasonic water meter characterized by comprising the antifreezing ultrasonic water meter pipe section structure according to any one of claims 1 to 11.

Description

Anti-freezing ultrasonic water meter pipe section structure and ultrasonic water meter Technical Field The invention relates to the technical field of ultrasonic measurement, in particular to an antifreezing ultrasonic water meter pipe section structure and an ultrasonic water meter. Background The ultrasonic water meter has been widely used in the flow metering field because of its advantages of high measurement accuracy, wide measuring range ratio, no mechanical abrasion, and small pressure loss. However, in actual use, ultrasonic water meters present serious freeze protection challenges, particularly in northern cold areas or in winter low temperature environments. When the ambient temperature is lower than the freezing point, residual water in the water meter pipe section is easy to freeze and expand, so that the pipe section, the probe or the internal elements are damaged, the metering accuracy is affected, the water supply system is possibly paralyzed, and the maintenance cost is increased. Aiming at the anti-freezing problem of the ultrasonic water meter, various solutions exist in the prior art. Part of the prior art adopts the mode of heat preservation parcel pipeline section, delays freezing through reducing heat dissipation, and this mode is simple structure, but the freeze-proof effect is limited, is difficult to deal with extreme low temperature environment. In addition, the scheme adopts an electric tracing technology, a heating belt is wound on the outer wall of the pipe section or a heating element is arranged in the pipe section, and the pipe section is electrified to heat so as to prevent ice, so that the mode has obvious anti-freezing effect, but needs continuous power supply, has higher energy consumption and has potential electrical safety hazards. In addition, the scheme adopts an emptying technology, namely, accumulated water in the pipe section is automatically emptied when water is stopped or at low temperature, and the mode can effectively avoid icing, but has a complex structure, has higher requirements on a control system, and needs to perform air discharge operation when water is re-introduced after the water is emptied, so that the user experience is influenced. In recent years, some improvements have attempted to add an anti-freezing cabin structure in the pipe section, and through the cooperation of the elastic element and the limiting element, a buffer space is provided when water is frozen, so as to absorb the pressure generated by the expansion of ice, thereby protecting the pipe section and the internal elements. However, the existing anti-freezing bin structure still has certain defects that the installation stability of a limiting part is poor, offset or clamping stagnation is easy to occur in the long-term use or frequent freezing process, the reliability of an anti-freezing function is influenced, and meanwhile, the sealing performance of the anti-freezing bin is insufficient, water is easy to permeate into an anti-freezing cavity, the normal work of an elastic element is influenced, and even the anti-freezing failure is caused. Therefore, on the premise of ensuring reliable and effective antifreezing function, the structural stability and sealing performance of the antifreezing bin are improved, the assembly process is simplified, the manufacturing cost is reduced, and the technical problem to be solved is urgent in the pipe section structure of the conventional ultrasonic water meter. Disclosure of Invention A series of concepts in a simplified form are introduced in the summary of the invention, which will be described in further detail in the detailed description. The summary of the invention is not intended to limit the critical and essential features of the claimed subject matter, nor is it intended to be used to determine the scope of the claimed subject matter. The invention provides an anti-freezing type ultrasonic water meter pipe section structure at least partially solving the problems, which comprises an ultrasonic water meter pipe section, an anti-freezing mechanism, a first transducer, a second transducer, a lining pipe, a reflecting piece and a central reflecting piece, wherein M anti-freezing holes and Y transducer mounting holes are formed in the surface of the ultrasonic water meter pipe section, the anti-freezing mechanism is arranged in the anti-freezing holes of the ultrasonic water meter pipe section through threads, the first transducer is used for transmitting ultrasonic waves or receiving ultrasonic waves, the second transducer is used for receiving ultrasonic waves or transmitting ultrasonic waves, the lining pipe is nested in the ultrasonic water meter pipe section, N through holes are formed in the top of the lining pipe, the reflecting piece comprises a first reflecting piece, a second reflecting piece and a central reflecting piece, the first reflecting piece and the second reflecting piece are matched with the first transducer and the s