Ultrasonic water meter

Abstract

The utility model discloses an ultrasonic water meter which comprises a meter head and a measuring pipeline installed at the bottom of the meter head, two sets of installation holes facing the interior of the meter head are formed in the side portion of the measuring pipeline, and two transducers are arranged at the positions of the two sets of installation holes respectively. The reflecting part comprises a connecting section and reflecting sections integrally formed at the two ends of the connecting section, the two reflecting sections directly face the two transducers in a one-to-one correspondence mode, and the sides, close to the connecting section, of the reflecting sections are provided with reflecting slopes. The beneficial effects of the utility model are that the installation reliability and stability of the reflection component are high, and the measurement is accurate.

Description

Technical Field

[0001] The utility model relates to a water flow monitoring device, in particular to an ultrasonic water meter. Background Art

[0002] Ultrasonic water meter is a new type of water meter that uses ultrasonic transducer to detect the time difference caused by the change in speed when the ultrasonic sound beam propagates downstream and upstream in water, analyzes and processes the water flow rate, and further calculates the water flow rate. Compared with mechanical water meters, it has the characteristics of high accuracy, good reliability, wide range ratio, long service life, no moving parts, no need to set parameters, and can be installed at any angle.

[0003] Common ultrasonic transducers are composed of a meter housing, a matching layer, a piezoelectric ceramic disc transducer, a backing, a lead cable, etc., and are installed in two ways: through-beam and reflective. Among them, for the reflective installation structure, the transducer is usually installed on the side wall of the measuring pipe, and the reflective component is installed at the corresponding transducer position in the measuring pipe. The traditional installation method of the reflective component is: two installation channels are set along the axial direction inside the measuring pipe, and the reflective sheet is connected to the installation channel. This installation method has technical defects of low stability and reliability. Utility Model Content

[0004] In view of this, the utility model provides an ultrasonic water meter, which aims to improve the technical defects of low stability and reliability in the traditional installation method of reflection components.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] An ultrasonic water meter comprises a meter head and a measuring pipe installed at the bottom of the meter head, wherein the side of the measuring pipe is provided with two groups of mounting holes facing the inside of the meter head, and each of the two groups of mounting holes is provided with a transducer, and the characteristic is that a reflecting component is fixedly installed inside the measuring pipe, and the reflecting component comprises a connecting section and reflecting sections integrally formed at both ends of the connecting section, and the two reflecting sections correspond to the two transducers one by one, and a reflecting inclined surface is provided on the side of the reflecting section close to the connecting section.

[0007] With the above structure, the reflective component adopts an integrated metal structure, which has high stability and reliability.

[0008] Preferably, a mounting seat protruding radially outward is provided on the upper side of the measuring pipe, the mounting seat extends into the interior of the meter head, the mounting hole is formed on the mounting seat, and the transducer is assembled in the mounting hole. With the above structure, the transducer is stably mounted.

[0009] Preferably, a bracket plate and a circuit board located above the bracket plate are detachably mounted inside the meter head, the bracket plate is located above the mounting seat, two metal pins are integrated on the transducer, through holes corresponding to the metal pins are provided on the bracket plate, the metal pins pass upward through the through holes and the circuit board in turn, and the metal pins are welded to the upper side of the circuit board. With the above structure, the transducer is easy to assemble and has high reliability.

[0010] Preferably, the reflective component is assembled in the measuring pipe by welding the connecting section, and the reflective section is a sheet structure completely formed at the end of the connecting section. With the above structure, the reflective component is firmly installed to ensure stable use of the ultrasonic water meter.

[0011] Preferably, the connecting section is constructed as a cylindrical structure, and the through cross-sectional area of ​​the cylindrical structure is equal to the orthographic projection area of ​​the reflecting slope in the vertical plane. With the above structure, the transducer can measure the flow rate of all water flows in the pipeline.

[0012] As a preferred embodiment, both ends of the cylindrical structure are provided with thickened parts on the outside, and the thickened parts are welded to the inside of the measuring pipe. With the above structure, the welding is firm.

[0013] Preferably, a groove is provided on the upper part of the outer wall of the mounting seat, and a first buckle is provided downward on the bracket plate, and the first buckle is buckled with the groove. The above structure is simple and easy to install.

[0014] As a preferred embodiment, the bracket plate is evenly distributed with two upward second buckles and two columns, the two second buckles are clamped to the upper end surface edge of the circuit board, the two columns extend above the circuit board, the second buckles and the columns are both provided with support steps, and the circuit board is mounted on the support steps. With the above structure, screw-free assembly is achieved, and the integrated assembly of components is realized inside the water meter through the clamping structure.

[0015] As a preferred embodiment, a housing mounting hole adapted to the mounting seat is provided on the housing of the meter head, and the housing mounting hole is welded to the lower part of the mounting seat. The above structure is adopted to ensure the sealing inside the meter head.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. A reflective component is fixedly assembled inside the measuring pipe. The reflective component includes a connecting section and reflective sections integrally formed at both ends of the connecting section. The reflective component is assembled in the measuring pipe by welding thickened cloth at both ends of the connecting section, and has high stability and reliability.

[0018] 2. The connecting section of the reflective component is constructed into a cylindrical structure, and the passing cross-sectional area of ​​the cylindrical structure is equal to the positive projection area of ​​the reflecting slope in the vertical plane, so that the transducer can measure the flow rate of the entire water flow in the pipeline.

[0019] 3. The bracket plate and the circuit board are assembled through the clamping structure on the upper and lower sides, and the corresponding components can be integrated and assembled in the water meter without screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model;

[0022] Figure 3 is a schematic structural diagram of the reflective component 4;

[0023] Figure 4 It is a schematic diagram of the internal structure of the utility model;

[0024] Figure 5 A schematic diagram showing the buckling of the first buckle 5b and the groove 2a1;

[0025] Figure 6 It is a schematic diagram showing the installation method of the circuit board 6. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with embodiments and drawings.

[0027] like Figure 1 and Figure 2 The ultrasonic water meter comprises a meter head 1 and a measuring pipe 2 installed at the bottom of the meter head 1. The side of the measuring pipe 2 is provided with two groups of mounting holes 2b facing the inside of the meter head 1. A transducer 3 is provided at each position of the two groups of mounting holes 2b. One of the two transducers transmits ultrasonic signals and the other receives ultrasonic signals. A mounting seat 2a protruding radially outward is provided on the upper side of the measuring pipe 2. The mounting seat 2a extends into the inside of the meter head 1. The mounting hole 2b is formed on the mounting seat 2a. A supporting step is provided at the lower part of the mounting hole 2b. The lower end of the transducer 3 is sealed and installed on the supporting step through a gasket. A shell mounting hole 7a adapted to the mounting seat 2a is provided on the shell 7 of the meter head 1. The shell mounting hole 7a is welded to the lower part of the mounting seat 2a.

[0028] like Figure 2 and Figure 3As described, a reflective component 4 is fixedly installed inside the measuring pipe 2, and the reflective component 4 includes a connecting section 4a and a reflective section 4b integrally formed at both ends of the connecting section 4a. The two reflective sections 4b correspond to the two transducers 3 one by one, and a reflective slope 4c is provided on the side of the reflective section 4b close to the connecting section 4a. The reflective component 4 is assembled in the measuring pipe 2 by welding the connecting section 4a. The connecting section 4a is constructed into a cylindrical structure, and thickened parts 4a1 are provided on the outside of both ends of the cylindrical structure. The thickened part 4a1 is welded to the inside of the measuring pipe 2, which can reduce the contact area between the connecting section and the measuring pipe, and make the installation more secure. The through cross-sectional area of ​​the cylindrical structure is equal to the positive projection area of ​​the reflective slope 4c in the vertical plane.

[0029] With such a design, the transducer 3 cooperates with the reflective component 4 and has little effect on the water flow velocity, and can accurately detect and measure the water flow in the measuring pipe 2.

[0030] like Figure 2 and Figure 4 As described, a bracket plate 5 and a circuit board 6 located above the bracket plate 5 are detachably installed inside the meter head 1. The bracket plate 5 is located above the mounting base 2a. Two metal pins 3a are integrated on the transducer 3. The bracket plate 5 is provided with through holes 5a adapted to the metal pins 3a. The metal pins 3a pass upward through the through holes 5a and the circuit board 6 in turn. The metal pins 3a are welded to the upper side of the circuit board 6, and the assembly is convenient and reliable.

[0031] like Figure 2 and Figure 5 As shown, a groove 2a1 is provided on the upper outer wall of the mounting seat 2a, and a downward first buckle 5b is provided on the bracket plate 5. One mounting seat 2a is provided with three buckles 5b, and the first buckle 5b is buckled with the groove 2a1 to install the bracket plate 5.

[0032] like Figure 4 and Figure 6 As shown, two upward second clips 5c and two columns 5d are evenly distributed on the bracket plate 5, the two second clips 5c are clamped to the upper end surface edges of the circuit board 6, the two columns 5d extend to above the circuit board 6, the second clips 5c and the columns 5d are both provided with supporting steps, the circuit board 6 is mounted on the supporting steps, the supporting steps support and limit the lower end of the circuit board 6, the two second clips 5c fix the upper end of the circuit board 6, the screw-free assembly, and the integrated assembly of components is realized inside the water meter through the clamping structure.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. An ultrasonic water meter, comprising a meter head (1) and a measuring pipe (2) installed at the bottom of the meter head (1), wherein the side of the measuring pipe (2) is provided with two groups of mounting holes (2b) facing the inside of the meter head (1), and each of the two groups of mounting holes (2b) is provided with a transducer (3), characterized in that: A reflective component (4) is fixedly mounted inside the measuring pipe (2), the reflective component (4) comprising a connecting section (4a) and reflective sections (4b) integrally formed at both ends of the connecting section (4a), the two reflective sections (4b) correspondingly facing the two transducers (3) one by one, and a reflective slope (4c) is provided on one side of the reflective section (4b) close to the connecting section (4a).

2. An ultrasonic water meter according to claim 1, characterized in that: The upper side of the measuring pipe (2) is provided with a mounting seat (2a) protruding radially outward, the mounting seat (2a) extends into the interior of the meter head (1), the mounting hole (2b) is formed on the mounting seat (2a), and the transducer (3) is assembled in the mounting hole (2b).

3. An ultrasonic water meter according to claim 2, characterized in that: A support plate (5) and a circuit board (6) located above the support plate (5) are detachably mounted inside the meter head (1); the support plate (5) is located above the mounting seat (2a); two metal pins (3a) are integrated on the transducer (3); a through hole (5a) adapted to the metal pins (3a) is provided on the support plate (5); the metal pins (3a) pass upward through the through hole (5a) and the circuit board (6) in sequence; and the metal pins (3a) are welded to the upper side of the circuit board (6).

4. An ultrasonic water meter according to claim 1, characterized in that: The reflective component (4) is assembled in the measuring pipe (2) by welding the connecting section (4a); the reflective section (4b) is a sheet-like structure completely formed at the end of the connecting section (4a).

5. An ultrasonic water meter according to claim 1, characterized in that: The connecting section (4a) is constructed as a cylindrical structure, and the through cross-sectional area of ​​the cylindrical structure is equal to the orthographic projection area of ​​the reflecting inclined surface (4c) in the vertical plane.

6. An ultrasonic water meter according to claim 5, characterized in that: Thickened portions (4a1) are provided on the outside of both ends of the cylindrical structure, and the thickened portions (4a1) are welded to the inside of the measuring pipe (2).

7. An ultrasonic water meter according to claim 3, characterized in that: A groove (2a1) is provided on the upper portion of the outer wall of the mounting seat (2a), and a first buckle (5b) facing downward is provided on the bracket plate (5), and the first buckle (5b) is buckled with the groove (2a1).

8. An ultrasonic water meter according to claim 3, characterized in that: The support plate (5) is evenly distributed with two second buckles (5c) and two upright posts (5d) pointing upwards, the two second buckles (5c) being engaged with the upper end surface edges of the circuit board (6), the two upright posts (5d) extending above the circuit board (6), the second buckles (5c) and the upright posts (5d) both being provided with support steps, and the circuit board (6) being mounted on the support steps.

9. An ultrasonic water meter according to claim 1, characterized in that: The housing (7) of the meter head (1) is provided with a housing mounting hole (7a) adapted to the mounting seat (2a), and the housing mounting hole (7a) is welded to the lower part of the mounting seat (2a).

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