Ultrasonic water meter metering mechanism

Abstract

The utility model relates to the technical field of ultrasonic water meters, and provides an ultrasonic water meter metering mechanism which comprises a sleeve, two transducers arranged on the sleeve, a core pipe arranged in the sleeve and a reflector plate arranged in the core pipe, and the two transducers are symmetrically arranged in the radial direction of the sleeve; the core tube comprises a necking section arranged in the middle and two expanding sections arranged at the two ends of the necking section respectively, the section of the inner surface of the necking section is rectangular, and a first through hole for ultrasonic waves emitted by a transducer to penetrate through is formed in the peripheral wall of the necking section; the reflecting sheet comprises a reflecting section arranged on the inner side wall, far away from the transducer, of the necking section and first mounting sections arranged at the upper end and the lower end of the reflecting section, and the outer surface of the reflecting section is parallel to the inner surface of the necking section. According to the invention, the influence on the flow velocity of the water flow in the pipeline by the arranged reflector plate is reduced, so that the influence on the measurement precision is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of ultrasonic water meters, and in particular to a measuring mechanism of an ultrasonic water meter. Background Art

[0002] The ultrasonic water meter's metering principle is to calculate fluid flow by measuring the time difference between ultrasonic waves propagating through the fluid. Specifically, the ultrasonic transducer within the ultrasonic water meter emits ultrasonic signals of a certain frequency. As these signals propagate through the fluid, they are affected by the fluid's flow rate, causing the ultrasonic signal's propagation speed to vary. The transmitted ultrasonic signal is then reflected by a reflector within the water meter. The time difference between the ultrasonic transducer's reception of the returning ultrasonic signal is used to calculate the fluid's flow rate. The flow rate is then calculated by multiplying the flow rate by the cross-sectional area of ​​the pipe.

[0003] Regarding the installation of the reflector, in the prior art, the reflector is usually a flat reflector that is tilted and arranged in the pipe. The reflector is symmetrically arranged along the radial direction of the pipe. For this type of reflector, a U-shaped bracket is usually provided to install the reflector in the pipe. However, since the U-shaped bracket is provided and the reflector is tilted in the pipe, it will affect the flow rate of the water flowing near the reflector, thereby affecting the measurement accuracy, so further improvement is needed. Utility Model Content

[0004] In order to reduce the influence of the reflective sheet on the water flow velocity in the pipeline and reduce the influence on the measurement accuracy, the present application provides an ultrasonic water meter measuring mechanism.

[0005] This application provides an ultrasonic water meter measuring mechanism, which adopts the following technical solutions:

[0006] An ultrasonic water meter measuring mechanism includes a sleeve, a transducer arranged on the sleeve, a core tube built into the sleeve, and a reflector arranged in the core tube, wherein two transducers are provided and are symmetrically arranged along the radial direction of the sleeve; the core tube includes a necking section arranged in the middle and two expanded sections respectively arranged at both ends of the necking section, the cross-section of the inner surface of the necking section is rectangular, the outer peripheral wall of the necking section is provided with a first through-hole for the ultrasonic wave emitted by the transducer to pass through, the reflector includes a reflecting section arranged on the inner side wall of the necking section away from the transducer and first mounting sections arranged at the upper and lower ends of the reflecting section, the outer surface of the reflecting section is parallel to the inner surface of the necking section, the angle between the direction of the ultrasonic wave emitted or received by the transducer and the outer surface of the reflecting section is acute, the two first mounting sections are respectively provided on the top wall and bottom wall of the necking section, and the top wall and bottom wall of the necking section are respectively provided with second mounting grooves for mounting the two first mounting sections.

[0007] By adopting the above technical solution, since the two transducers are symmetrically arranged along the radial direction of the sleeve, and since the angle between the direction of the ultrasonic wave emitted or received by the transducer and the outer surface of the reflecting section is set at an acute angle, after one of the transducers emits the ultrasonic wave, it is reflected through the reflecting section to the other transducer. By providing a first mounting section to be respectively mounted on the top wall and bottom wall of the locking neck section, the reflecting plate can be installed in the core tube, and the cross-section of the reflecting plate is set to be U-shaped to reduce the possibility of separation from the necking section due to the influence of water flow pressure.

[0008] Because the reflector is built into the constricted section, the water flow velocity is increased, and the reflector section is parallel to the inner side wall of the constricted section. Compared to directly setting the reflector at an angle in the core tube or installing the reflector in the core tube via a U-shaped frame, the ultrasonic waves emitted by the water flowing through the reflector section can be reduced, thereby reducing the impact of the reflector on the water flow velocity in the pipe, thereby reducing the impact on measurement accuracy. Moreover, because the angle between the direction of the ultrasonic wave emitted or received by the transducer and the outer surface of the reflector section is set at an acute angle, the propagation path of the ultrasonic wave can be further lengthened compared to setting the direction of the ultrasonic wave perpendicular to the direction of the water flow, thereby further improving the measurement accuracy of the flow rate.

[0009] Preferably, the width and length of the second mounting groove are respectively greater than the width and length of the first mounting section.

[0010] By adopting the above technical solution, since the reflective sheet will expand and contract with the water temperature, the width and length of the second mounting groove are respectively larger than the width and length of the first mounting section, so that the second mounting groove is slightly larger than the first mounting section, so as to adapt to the expansion caused by temperature, thereby reducing the possibility of the expanded reflective sheet squeezing the core tube and causing damage to the core tube, or reducing the possibility of the surface of the reflective sheet becoming uneven when squeezed due to expansion.

[0011] Preferably, the inner side wall of the necking section is provided with a first installation groove for installing the reflecting section, and the thickness of the reflecting section is less than or equal to the groove depth of the first installation groove.

[0012] By adopting the above-mentioned technical solution, a first installation groove for installing the reflective segment is opened on the inner wall of the necking section to improve the connection strength between the reflective sheet and the core tube. Since the thickness of the reflective segment is less than or equal to the depth of the first installation groove, the outer surface of the reflective sheet is flush with the inner surface of the necking section, or is embedded in the necking section, thereby reducing the impact of the reflective sheet on the water flow when it is convexly set, thereby further improving the measurement accuracy of the flow rate.

[0013] Preferably, a second through-hole is formed through the inner side wall of the necked section located at the reflecting section, and the aperture of the second through-hole is smaller than the width and length of the reflecting section.

[0014] By adopting the above technical solution, since the reflective sheet will expand and contract with the water temperature, a corresponding second perforation is provided to allow the reflective sheet to expand a certain amount when the reflective sheet expands and contracts.

[0015] Preferably, the core tube includes a first curved plate and a second curved plate abutting the first curved plate, the inner surfaces of the first curved plate and the second curved plate close to each other form a flow path for water supply, the first mounting groove and the second mounting groove are arranged on the first curved plate, and the second mounting groove extends to the side of the second curved plate close to the first curved plate.

[0016] By adopting the above technical solution, the core tube includes a first curved plate and a second curved plate. Since the second mounting groove extends to the sides of the first curved plate and the second curved plate, the corresponding part of the reflective sheet is installed in the corresponding mounting groove, and then the first curved plate and the second curved plate are abutted against each other, and then the reflective sheet is embedded in the core tube through the sleeve, which makes installation relatively convenient.

[0017] Preferably, a positioning column is protruding from the side surface of the first arc-shaped plate, and a positioning hole for the positioning column to be engaged is opened on the side surface of the second arc-shaped plate.

[0018] By adopting the above technical solution, the positioning column and the positioning hole are engaged with each other, so as to reduce the axial force between the first arc-shaped plate and the second arc-shaped plate, thereby reducing the possibility of relative slippage between the two.

[0019] Preferably, the reflective sheet further includes a second mounting segment disposed between the two first mounting segments, and a width of the second mounting segment is smaller than a width of the first mounting segment.

[0020] By adopting the above technical solution, by providing a second mounting section 43 so that the radial cross-section of the reflector 4 is rectangular, the connection strength between the reflector 4 and the core tube 3 can be further improved, and the supporting effect of the reflector section 41 can be improved, thereby reducing the possibility of the reflector 4 loosening when subjected to water pressure or external force.

[0021] Preferably, the second mounting section and the reflecting section are respectively arranged on two opposite side walls of the necking section.

[0022] By adopting the above technical solution, the second installation section and the reflecting section are respectively arranged on the opposite side walls of the necking section, so as to reduce the influence of the second installation section on the flow velocity of the water flow when it is arranged in the middle of the core tube.

[0023] In summary, the present invention has the following beneficial effects:

[0024] The reflector sheet includes a reflective section and a first mounting section, which facilitates installation of the reflector sheet within the core tube, thereby reducing the effect of the reflector sheet on the flow velocity of the water flow and thus reducing the impact on measurement accuracy. Furthermore, the second mounting section is included to further enhance the connection strength between the reflector sheet and the core tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic cross-sectional structural diagram of Example 1 of the present application;

[0026] Figure 2 Schematic diagram of the structure of the core tube and the reflector in Example 1 of the present application;

[0027] Figure 3 Schematic diagram of the structure of the core tube in Example 1 of the present application;

[0028] Figure 4 is a schematic structural diagram of the reflector in Example 1 of the present application;

[0029] Figure 5 2 is a schematic cross-sectional view of the core tube and the reflector in Example 2 of the present application;

[0030] Figure 6 2 is a schematic side view of the reflective sheet in Example 2 of the present application;

[0031] Explanation of the accompanying drawings: 1. Sleeve; 11. Mounting seat; 2. Transducer; 3. Core tube; 31. Neck section; 32. Diameter expansion section; 33. First curved plate; 34. Second curved plate; 35. First through-hole; 36. First mounting groove; 37. Second through-hole; 38. Second mounting groove; 39. Third mounting groove; 4. Reflector; 41. Reflection section; 42. First mounting section; 43. Second mounting section; 5. Positioning column; 51. Positioning hole; 6. Reinforcement rib. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-6 , further details of this application are given.

[0033] The embodiment of the present application discloses an ultrasonic water meter measuring mechanism.

[0034] Example 1:

[0035] An ultrasonic water meter measuring mechanism, referring to Figure 1 、 Figure 2, comprising a sleeve 1, a transducer 2 disposed on the sleeve 1, a core tube 3 built into the sleeve 1, and a reflector 4 disposed in the core tube 3. The transducer 2 is built into the sleeve 1, and a mounting seat 11 for mounting the transducer 2 is fixedly penetrated through the outer peripheral wall of the sleeve 1. Two transducers 2 are provided and symmetrically arranged along the radial direction of the sleeve 1. The upper ends of the two transducers 2 are inclined toward the two ends of the sleeve 1, respectively. In this embodiment, the direction of the ultrasonic wave emitted or received by the transducer 2 is inclined relative to the axis of the sleeve 1.

[0036] In this embodiment, the core tube 3 is made of plastic and is arranged along the length direction of the core tube 3. The core tube 3 includes a necking section 31 arranged in the middle and two expanded diameter sections 32 respectively arranged at both ends of the necking section 31. The cross-section of the inner surface of the necking section 31 is rectangular, and the surfaces at the connection between the four surfaces of the inner surface of the necking section 31 are chamfered. The inner diameter of the necking section 31 is smaller than the inner diameter of the expanded diameter section 32. The core tube 3 is arranged along the axis of the core tube 3. The core tube 3 specifically includes a first curved plate 33 and a second curved plate 34 abutting the first curved plate 33. The first curved plate 33 and the second curved plate 34 are arranged in a semicircular plate cross-section along the radial direction. The inner surfaces of the first curved plate 33 and the second curved plate 34 close to each other form a flow path for water circulation.

[0037] Reference Figure 2 、 Figure 3 A positioning column 5 is protruding from the side of the first curved plate 33. Two positioning columns 5 are arranged at intervals along the length direction of the necking section 31, and two are arranged at intervals along the width direction of the necking section 31, for a total of four positioning columns 5. Correspondingly, a positioning hole 51 is opened on the side of the second curved plate 34 for the positioning column 5 to be embedded.

[0038] Furthermore, the first curved plate 33 and the second curved plate 34 are both provided with reinforcing ribs 6 on the outer surface of the necking section 31. The reinforcing ribs 6 are arranged in the form of semicircular plates. Several groups of reinforcing ribs 6 are arranged at intervals along the length direction of the necking section 31, and one group has two reinforcing ribs 6. The specific arrangement is based on demand. In this embodiment, two groups of positioning columns 5 are specifically provided and are respectively close to the two ends of the necking section 31.

[0039] Among them, the two transducers 2 are arranged near the necking section 31, and the outer wall of the necking section 31 is provided with a first through-hole 35 for the ultrasonic waves emitted by the transducer 2 to pass through, which is specifically arranged on the outer wall of the first arc-shaped plate 33. There are two first through-holes 35 and they are respectively arranged on both sides of the two groups of reinforcing ribs 6.

[0040] In this embodiment, the reflector 4 is made of a stainless steel plate, which is not easily rusted in water and has a certain strength. Regarding the position of the reflector 4, the reflector 4 is specifically arranged at the neck section 31. The reflector 4 specifically includes a reflective segment 41 arranged on the inner sidewall of the neck section 31 away from the transducer 2, and first mounting segments 42 arranged at the upper and lower ends of the reflective segment 41. The connection between the reflective segment 41 and the two first mounting segments 42 is chamfered, and the reflective segment 41 and the two first mounting segments 42 form a U-shaped arrangement of the reflector 4. The outer surface of the reflective segment 41 is parallel to the inner surface of the neck section 31, and the inner sidewall of the neck section 31 is provided with a first mounting groove 36 for mounting the reflective segment 41.

[0041] Reference Figure 2 、 Figure 4 In this embodiment, to account for thermal expansion and contraction, the thickness of the reflective segment 41 is less than the depth of the first mounting groove 36, and the width and length of the reflective segment 41 are respectively less than the width and length of the first mounting groove 36. Furthermore, a second through-hole 37 is formed through the inner sidewall of the necked segment 31 located within the reflective segment 41. The diameter of the second through-hole 37 is smaller than the width and length of the reflective segment 41.

[0042] Among them, the two first mounting sections 42 are respectively arranged on the top wall and bottom wall of the necking section 31, and the outer surfaces of the two first mounting sections 42 are respectively parallel to the top wall and bottom wall of the necking section 31. The top wall and bottom wall of the necking section 31 are respectively provided with second mounting grooves 38 for installing the two first mounting sections 42. Similarly, it can be obtained that the thickness of the first mounting section 42 is less than the depth of the second mounting groove 38, and the width and length of the first mounting section 42 are respectively less than the width and length of the second mounting groove 38.

[0043] In this embodiment, the first mounting groove 36 and the second mounting groove 38 are both disposed on the inner surface of the second curved plate 34 , and the second mounting groove 38 extends to the side surface of the second curved plate 34 close to the first curved plate 33 .

[0044] It should be noted that the angle between the direction of the ultrasonic wave emitted or received by the transducer 2 and the outer surface of the reflecting section 41 is set to be an acute angle.

[0045] The implementation principle of the ultrasonic water meter measuring mechanism of the embodiment of the present application is as follows: because the two transducers 2 are symmetrically arranged along the radial direction of the casing 1, and because the angle between the direction of the ultrasonic wave emitted or received by the transducer 2 and the outer surface of the reflecting section 41 is set at an acute angle, after one of the transducers 2 emits an ultrasonic wave, it is reflected by the reflecting section 41 to the other transducer 2. By providing a first mounting section 42 to be mounted on the top and bottom walls of the locking neck section 31 respectively, the reflector 4 is mounted in the core tube 3, and the cross-section of the reflector 4 is set to be U-shaped to reduce the possibility of separation from the neck section 31 due to the influence of water flow pressure. In addition, because the angle between the direction of the ultrasonic wave emitted or received by the transducer 2 and the outer surface of the reflecting section 41 is set at an acute angle, its propagation path can be further lengthened compared to setting the direction of the ultrasonic wave perpendicular to the water flow direction, thereby further improving the measurement accuracy of the flow rate.

[0046] Example 2:

[0047] Reference Figure 5 、 Figure 6 The difference from Example 1 is that the reflector 4 further includes a second mounting section 43 disposed between the two first mounting sections 42. In this embodiment, the second mounting section 43 and the reflector section 41 are respectively disposed on opposite side walls of the necking section 31, that is, the second mounting section 43 is disposed on the first curved plate 33, and the outer surface of the second mounting section 43 is parallel to the inner side wall of the first curved plate 33 and located on the necking section 31. The width of the second mounting section 43 is smaller than the width of the first mounting section 42 and smaller than the distance between the two first through-holes 35, so as to reduce the impact of the second mounting section 43 on ultrasonic reflection. The connection between the second mounting section 43 and the first mounting sections 42 at both ends is chamfered, and the opposite side walls of the second mounting section 43 smoothly transition toward the first mounting sections 42 at both ends, giving the second mounting section 43 a waist-shaped configuration. The inner side wall of the first curved plate 33 is provided with a third mounting groove 39 for mounting the second mounting section 43 . The width of the second mounting section 43 is smaller than the depth of the third mounting groove 39 , and the width and length of the second mounting section 43 are respectively smaller than the width and length of the third mounting groove 39 .

[0048] It should be noted that the two second mounting grooves 38 extend to the top wall and the bottom wall of the first arc-shaped plate 33 located at the necking section 31 , and are connected to the third mounting groove 39 .

[0049] By providing a second mounting section 43 so that the radial cross-section of the reflector 4 is rectangular, the connection strength between the reflector 4 and the core tube 3 can be further improved, and the support effect of the reflector section 41 can be improved, reducing the possibility of the reflector 4 loosening when subjected to water pressure or external force.

[0050] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An ultrasonic water meter measuring mechanism, characterized in that: The invention comprises a sleeve (1), a transducer (2) arranged on the sleeve (1), a core tube (3) built into the sleeve (1), and a reflector (4) arranged in the core tube (3), wherein two transducers (2) are provided and are symmetrically arranged along the radial direction of the sleeve (1); the core tube (3) comprises a necking section (31) provided in the middle and two diameter-expanding sections (32) respectively provided at both ends of the necking section (31); the cross section of the inner surface of the necking section (31) is rectangular; the outer peripheral wall of the necking section (31) is provided with a first through-hole (35) for ultrasonic waves emitted by the transducer (2) to pass through; the reflector (4 ... ) comprises a reflection section (41) arranged on the inner side wall of the necking section (31) away from the transducer (2) and a first mounting section (42) arranged at the upper and lower ends of the reflection section (41), the outer surface of the reflection section (41) is parallel to the inner surface of the necking section (31), the angle between the direction of the ultrasonic wave emitted or received by the transducer (2) and the outer surface of the reflection section (41) is set to be an acute angle, the two first mounting sections (42) are respectively arranged on the top wall and the bottom wall of the necking section (31), and the top wall and the bottom wall of the necking section (31) are respectively provided with a second mounting groove (38) for mounting the two first mounting sections (42).

2. The ultrasonic water meter measuring mechanism according to claim 1, characterized in that: The width and length of the second mounting groove (38) are respectively greater than the width and length of the first mounting section (42).

3. The ultrasonic water meter measuring mechanism according to claim 1, characterized in that: The inner side wall of the necking section (31) is provided with a first installation groove (36) for installing the reflecting section (41), and the thickness of the reflecting section (41) is less than or equal to the groove depth of the first installation groove (36).

4. The ultrasonic water meter measuring mechanism according to claim 3, characterized in that: The necking section (31) is provided with a second through-hole (37) on the inner side wall of the reflecting section (41), and the aperture of the second through-hole (37) is smaller than the width and length of the reflecting section (41).

5. The ultrasonic water meter measuring mechanism according to claim 3, characterized in that: The core tube (3) comprises a first curved plate (33) and a second curved plate (34) abutting the first curved plate (33); inner surfaces of the first curved plate (33) and the second curved plate (34) close to each other form a flow path for water supply; the first mounting groove (36) and the second mounting groove (38) are provided on the first curved plate (33); the second mounting groove (38) extends to a side surface of the second curved plate (34) close to the first curved plate (33).

6. The ultrasonic water meter measuring mechanism according to claim 5, characterized in that: A positioning column (5) is protruding from the side surface of the first arc-shaped plate (33), and a positioning hole (51) for the positioning column (5) to be engaged is opened on the side surface of the second arc-shaped plate (34).

7. The ultrasonic water meter measuring mechanism according to claim 1, characterized in that: The reflective sheet (4) further comprises a second mounting section (43) arranged between the two first mounting sections (42), and the width of the second mounting section (43) is smaller than the width of the first mounting section (42).

8. The ultrasonic water meter measuring mechanism according to claim 7, characterized in that: The second mounting section (43) and the reflecting section (41) are respectively arranged on two opposite side walls of the necking section (31).

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