CN217005928U

CN217005928U - Ultrasonic sound beam reflection device and ultrasonic water meter

Info

Publication number: CN217005928U
Application number: CN202220291972.0U
Authority: CN
Inventors: 张令; 袁方方; 李长城
Original assignee: Jinan Peihua Information Technology Co ltd
Current assignee: Jinan Peihua Information Technology Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-07-19
Anticipated expiration: 2032-02-14

Abstract

The application provides an ultrasonic sound beam reflection device and ultrasonic water meter. The ultrasonic sound beam reflection device is arranged in the measuring pipe section and used for reflecting ultrasonic waves and comprises a reflection sheet bracket, a first reflection sheet and a second reflection sheet. The reflector bracket includes a first frame and a second frame. The first frame includes a first channel section, a first left brace, and a first right brace. The second frame includes a second channel section, a second left brace, and a second right brace. The first groove section and the second groove section are spliced to form a flow guide channel, the first left support and the second left support are spliced to form a first mounting surface with a preset inclination angle, and the first right support and the second right support are spliced to form a second mounting surface with a preset inclination angle. The first reflector plate is mounted on the first mounting surface, and the second reflector plate is mounted on the second mounting surface. The technical scheme of this application can effectively reduce the structure assembly relation, reduces spare part assembly error to improve measurement accuracy and stability.

Description

Ultrasonic sound beam reflection device and ultrasonic water meter

Technical Field

The application relates to the technical field of ultrasonic flow measurement, in particular to an ultrasonic sound beam reflecting device and an ultrasonic water meter.

Background

The sound beam reflecting device is an important component for the ultrasonic water meter with the transducers arranged on the same side. One transducer of the transducers on the same side emits ultrasonic waves, and the ultrasonic waves are transmitted to the other transducer after being reflected by the sound beam reflecting device, so that convenience is provided for subsequent measurement according to the ultrasonic waves.

The sound beam reflection device used by the ultrasonic water meter is mainly composed of a sound beam reflection plate, a sound beam reflection support and a guide pipe, wherein the sound beam reflection support and the guide pipe are split parts, more assembly relations exist, more assembly errors easily occur, the installation errors of a certain degree also occur in the installation angle of the reflection plate, more energy loss is generated by ultrasonic waves, and the situation of inaccurate measurement occurs.

Therefore, how to design an ultrasonic beam reflection apparatus capable of effectively reducing the assembly relationship of the structure and reducing the assembly error of the components becomes a popular research point.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide an ultrasonic acoustic beam reflecting device, which can effectively reduce the structure assembly relation and reduce the assembly error of parts, thereby improving the measurement accuracy and stability.

A second object of the embodiments of the present application is to provide an ultrasonic water meter using the above ultrasonic sound beam reflection apparatus.

In a first aspect, an ultrasonic acoustic beam reflection apparatus is provided, which is installed in a measurement pipe section of an ultrasonic water meter and is used for reflecting ultrasonic waves, and comprises a reflector plate bracket, a first reflector plate and a second reflector plate.

The reflector plate support comprises a first frame and a second frame which can be assembled; the first frame comprises a first groove section, a first left support and a first right support, wherein the first left support and the first right support are connected with two ends of the first groove section; the second frame comprises a second groove section, a second left support and a second right support, and the second left support and the second right support are connected with the two ends of the second groove section; when the first frame and the second frame are in a splicing state, the first groove section and the second groove section are spliced to form a flow guide channel for water to pass through, the first left support and the second left support are spliced to form a first mounting surface with a preset inclination angle on one surface facing the flow guide channel, and the first right support and the second right support are spliced to form a second mounting surface with a preset inclination angle on one surface facing the flow guide channel. The first reflection sheet is mounted on the first mounting surface, the second reflection sheet is mounted on the second mounting surface, and the reflection surfaces of the first reflection sheet and the second reflection sheet are arranged as follows: the ultrasonic waves are reflected by the reflecting surface of the first reflecting sheet, pass through the flow guide channel to reach the second reflecting sheet and are reflected out by the reflecting surface of the second reflecting sheet.

In an implementable scheme, when the first frame and the second frame are in a splicing state, the reflector bracket is in a completely symmetrical structure with a vertical central plane in the length direction of the spliced whole structure.

In an implementable scheme, a pin shaft and a pin hole are arranged on a splicing surface of the first frame and the second frame, a pin shaft and a pin hole are also arranged on a splicing surface of the second frame and the first frame, and the first frame and the second frame are spliced into an integral structure through the matching of the pin shaft and the pin hole.

In one embodiment, the first frame is an integrally formed structure, and the second frame is an integrally formed structure.

In one embodiment, the slope of the contour of the upper half of the flow guide channel 13 varies in the direction of flow of the water flow from a finite negative value to zero and then from zero to a finite positive value.

In one embodiment, the first left bracket includes at least two arms and a mounting plate disposed at a predetermined angle between the two arms; the structures of the first right support, the second left support and the second right support are the same as those of the first left support; the mounting plate of the first left support and the mounting plate of the second left support are spliced and form a first mounting surface on the surface facing the guide flow channel, and the mounting plate of the first right support and the mounting plate of the second right support are spliced and form a second mounting surface on the surface facing the guide flow channel.

In an embodiment, the mounting plate is provided with a groove structure on the upper side and the lower side for engaging with an edge portion of the first reflective sheet or the second reflective sheet.

In one embodiment, the peripheral circumferential surface of the first groove section is provided with a semi-circumferential groove, and the peripheral circumferential surface of the second groove section is also provided with a semi-circumferential groove; after the first groove section and the second groove section are spliced, the semi-circumference groove on the outer side of the first groove section and the semi-circumference groove on the outer side of the second groove section are spliced to form a circumference groove, and a sealing ring is sleeved in the circumference groove.

According to the second aspect of the application, the ultrasonic water meter comprises a measuring pipe section, the ultrasonic sound beam reflection device in the scheme and a plug. The measuring pipe section is used for being connected to a water flow pipeline and is provided with a mounting hole. The ultrasonic sound beam reflection device is arranged in the measuring pipe section, and a positioning hole groove is formed in a reflector plate support formed by splicing the first frame and the second frame. The plug penetrates through the mounting hole of the measuring pipe section to be matched with the positioning hole groove on the reflector plate support, so that the ultrasonic sound beam reflection device is fixed at the preset position of the measuring pipe section.

Compared with the prior art, the beneficial effect of this application is:

when the ultrasonic sound beam reflection device is used, the whole reflector bracket can be molded only by splicing the first frame and the second frame without redundant assembly steps, and then the first reflector and the second reflector are respectively installed on the first installation surface and the second installation surface formed by splicing the first frame and the second frame, so that the assembly of the ultrasonic sound beam reflection device can be completed. Compare original sound beam reflection support and honeycomb duct and be split type structure, the reflector plate support of this application has greatly reduced spare part quantity, and whole reflect meter has also simplified the assembly step simultaneously, has simplified the assembly relation, also does benefit to and reduces the assembly error that complicated assembly relation produced.

In addition, the first left support, the first right support and the first groove section are of an integral structure, the second left support, the second right support and the second groove section are of an integral structure, and the structural relationship of the integral structure is determined during manufacturing, so that after the first frame and the second frame are spliced, the inclination angle of the reflector mounting surface of the formed reflector support basically cannot change again in the assembling process, the accuracy of the inclination angle of the reflector after being mounted is well guaranteed, the accuracy of ultrasonic reflection transmission is improved, and the accuracy of subsequent ultrasonic measurement is further improved.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of an ultrasonic acoustic beam reflecting device according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram illustrating a reflector support according to an embodiment of the present disclosure;

fig. 3 is a schematic view of a bottom side structure of an ultrasonic acoustic beam reflection apparatus according to an embodiment of the present application;

FIG. 4 is a schematic structural diagram of the ultrasonic beam reflecting device of FIG. 3 in a use state in a measurement pipeline;

FIG. 5 is a schematic structural view of the ultrasonic beam reflecting device of FIG. 1 without a sealing ring;

FIG. 6 is a schematic structural diagram illustrating a usage state of an ultrasonic beam reflection apparatus having a cone structure according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of an ultrasonic water meter according to an embodiment of the present application.

In the figure: 10. a reflector plate holder; 11. a first frame; 111. a first groove section; 112. a first left bracket; 113. a first right bracket; 12. a second frame; 121. a second groove segment; 122. a second left bracket; 123. a second right bracket; 1121. a support arm; 1122. mounting a plate; 1123. a groove structure; 13. a flow guide channel; 14. a pin shaft; 15. a pin hole; 16. a first vertebral body; 17. a second vertebral body; 18. a circumferential groove; 20. a first reflective sheet; 30. a second reflective sheet; 40. a seal ring; 50. a positioning hole groove; 60. a support plane; 100. measuring a pipe section; 101. mounting holes; 102. positioning a plane; 200. a transducer; 300. and (7) a plug.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.

According to a first aspect of the present application, as shown in fig. 1 and 2, there is first provided an ultrasonic acoustic beam reflecting device installed in a measuring pipe section 100 of an ultrasonic water meter for reflecting ultrasonic waves, the reflecting device including a reflecting sheet support 10, a first reflecting sheet 20 and a second reflecting sheet 30.

The reflector bracket 10 comprises a first frame 11 and a second frame 12 which can be assembled; the first frame 11 includes a first groove section 111 and first left and

right brackets

112 and 113 connected to both ends of the first groove section 111; the second frame 12 includes a second groove section 121 and a second left bracket 122 and a second right bracket 123 connected to both ends of the second groove section 121; when the first frame 11 and the second frame 12 are in a split state, the first groove section 111 and the second groove section 121 are split to form a flow guide channel 13 for water to pass through, the first left bracket 112 and the second left bracket 122 are split to form a first mounting surface with a predetermined inclination angle on a surface facing the flow guide channel 13, and the first right bracket 113 and the second right bracket 123 are split to form a second mounting surface with a predetermined inclination angle on a surface facing the flow guide channel 13. A first reflection sheet 20 and a second reflection sheet 30, the first reflection sheet 20 being mounted on the first mounting surface, the second reflection sheet 30 being mounted on the second mounting surface, the reflection surfaces of the first reflection sheet 20 and the second reflection sheet 30 being arranged: the ultrasonic wave is reflected by the reflection surface of the first reflection sheet 20, passes through the flow guide channel 13 to reach the second reflection sheet 30, and is reflected by the reflection surface of the second reflection sheet 30.

When the ultrasonic sound beam reflection device of the embodiment is used, the whole reflector bracket 10 can be formed only by splicing the first frame 11 and the second frame 12, no extra assembly step is needed, and the first reflector 20 and the second reflector 30 are respectively installed on the first installation surface and the second installation surface formed by splicing the first frame 11 and the second frame 12, so that the assembly of the ultrasonic sound beam reflection device can be completed. Compare original sound beam reflection support and water conservancy diversion passageway and be split type structure, the reflector plate support 10 of this application and water conservancy diversion passageway 13 structure as an organic whole have greatly reduced spare part quantity, and whole reflect meter has also simplified the assembly step simultaneously, has simplified the assembly relation to also do benefit to and reduce the error that complicated assembly relation produced.

In addition, the first left bracket 112, the first right bracket 113 and the first groove section 111 are of an integral structure, the second left bracket 122, the second right bracket 123 and the second groove section 121 are of an integral structure, and the structural relationship of the integral structure is determined during manufacturing, so that after the first frame 11 and the second frame 12 are spliced, the inclination angle of the reflector mounting surface of the formed reflector bracket 10 basically cannot change due to the assembling process, the accuracy of the inclination angle after the reflector is mounted is well ensured, the accuracy of ultrasonic reflection transmission is improved, and the accuracy of subsequent ultrasonic measurement is further improved.

It should be noted that the inclination angle of the first mounting surface and the second mounting surface is generally 45 degrees, and the ultrasonic wave emitted by one transducer 200 is generally perpendicular to the extending direction of the measuring pipe section 100, and is emitted to the first reflection sheet 20 at an incident angle of 45 degrees, then emitted to the second reflection sheet 30 at a reflection angle of 45 degrees, then emitted to the second reflection sheet 30 at an incident angle of 45 degrees, and then emitted to the other transducer 200 at a reflection angle of 45 degrees. In addition to the above-mentioned angles, the first mounting surface and the second mounting surface may be configured at other angles (30 degrees, 40 degrees, 50 degrees, 60 degrees, etc.), as long as the ultrasonic waves emitted from one transducer 200 are reflected by the first reflection sheet 20 and the second reflection sheet 30 and then received by the other transducer 200.

In one embodiment, the center connecting line of the first reflection sheet 20 mounted on the first mounting surface and the second reflection sheet 30 mounted on the second mounting surface coincides with the axis of the flow guide channel 13, so that the reflection sheets can receive the ultrasonic sound beams as much as possible, and the sound beams can pass through the middle of the flow guide channel 13 as much as possible, so that the direction of the sound beams is prevented from being parallel to the axis of the flow guide channel 13 as much as possible, namely, the sound beams are prevented from being inclined to the flow guide channel 13 during transmission, and the ultrasonic energy is prevented from being lost.

In one embodiment, as shown in fig. 1, 3 and 5, when the first frame 11 and the second frame 12 are in the assembled state, the reflector support 10 is completely symmetrical about the vertical center of the length direction of the assembled whole structure, so that the reflector support 10 does not need to distinguish the water flow direction in the measuring pipe section 100 when in use, and can be installed in the measuring pipe section 100 in a forward or reverse manner.

In one embodiment, as shown in fig. 2, a pin 14 and a pin hole 15 are disposed on a mating surface of the first frame 11 and the second frame 12, a pin 14 and a pin hole 15 are also disposed on a mating surface of the second frame 12 and the first frame 11, and the first frame 11 and the second frame 12 are assembled into an integrated structure through the cooperation of the pin 14 and the pin hole 15. The cooperation of the pin 14 and the pin hole 15 facilitates the positioning when the first frame 11 is assembled with the second frame 12.

In one embodiment, as shown in fig. 2, the first frame 11 is a one-piece structure and the second frame 12 is also a one-piece structure. The integrated into one piece structure mainly reduces spare part quantity, increases the wholeness of structure, reduces assembly error, and integrated into one piece also does benefit to subsequent mass production simultaneously.

In one embodiment, as shown in fig. 4 and 6, the slope of the contour line of the upper half of the guide channel 13 changes from a finite negative value to zero and then from zero to a finite positive value in the direction of the water flow. The slope change of the flow guide channel 13 represents that the inner diameter of the flow guide channel 13 gradually decreases from two ends to the middle to form a necking, so that the fluid flow state of the measuring section is in a laminar flow state or an approximate laminar flow state, and the propagation of ultrasonic waves in the fluid is more stable. Meanwhile, the necking structure is favorable for improving the flow velocity of the medium to be measured in the flow guide channel 13, so that small flow can be better measured, and the measurement range of the water meter is improved.

In one embodiment, as shown in fig. 4 and 6, the flow guide channel 13 is symmetrical about the vertical central section in the channel length direction, and the channel size and channel profile on both sides are completely symmetrical, which helps to reduce the processing difficulty and facilitate the use without distinguishing the front direction and the back direction.

In one embodiment, as shown in fig. 2, the first left bracket 112 includes at least two arms 1121 and a mounting plate 1122 disposed at a predetermined angle between the two arms 1121; the first right bracket 113, the second left bracket 122, and the second right bracket 123 have the same structure as the first left bracket 112; the mounting plate 1122 of the first left bracket 112 and the mounting plate 1122 of the second left bracket 122 are joined to form a first mounting surface on the side facing the flow guide passage 13, and the mounting plate 1122 of the first right bracket 113 and the mounting plate 1122 of the second right bracket 123 are joined to form a second mounting surface on the side facing the flow guide passage 13.

In one embodiment, as shown in fig. 2, the mounting plate 1122 is provided with groove structures 1123 on the upper and lower sides thereof for engaging with edge portions of the first reflective sheet 20 or the second reflective sheet 30 to facilitate quick mounting of the first reflective sheet 20 or the second reflective sheet 30.

In one embodiment, as shown in fig. 6, the mounting plate 1122 is half-tapered on the opposite side toward the flow guide channel 13. The mounting plates 1122 of the first left bracket 112 and the mounting plates 1122 of the second left bracket 122 are spliced to form a first cone 16 on the side opposite the side facing the flow guide channel 13. The mounting plate 1122 of the first right bracket 113 and the mounting plate 1122 of the second right bracket 123 are coupled to form a second cone 17 on the side opposite to the side facing the flow guide channel 13. The structure of the first cone body 16 and the second cone body 17 can guide the water flow entering the flow guide channel 13, greatly reduce the resistance to the water flow, reduce the occurrence of the turbulent flow phenomenon as much as possible, and enable the ultrasonic measurement to be more accurate. Because turbulence phenomenon does not exist basically, the ultrasonic loss is less, and the ultrasonic flow device using the device is easier to calibrate.

In one embodiment, as shown in fig. 5, the peripheral circumferential surface of the first groove section 111 is provided with a semi-circumferential groove, and the peripheral circumferential surface of the second groove section 121 is also provided with a semi-circumferential groove. After the first groove section 111 and the second groove section 121 are spliced, a semi-circumferential groove on the outer side of the first groove section 111 and a semi-circumferential groove on the outer side of the second groove section 121 are spliced to form a circumferential groove 18, and a sealing ring 40 is sleeved in the circumferential groove 18. The sealing ring 40 can effectively seal the gap between the outer wall of the guide channel 13 and the inner wall of the measuring pipe section 100, and prevent liquid from flowing through the gap between the outer wall of the guide channel 13 and the inner wall of the measuring pipe section 100 to influence the stability of the whole device.

According to a second aspect of the present application, as shown in fig. 7, there is also provided an ultrasonic water meter, which at least comprises a measuring pipe section 100, an ultrasonic sound beam reflection device in the above-mentioned solution and a plug 300, wherein none of the other existing components are listed.

As shown in fig. 3, 4 and 7, the measuring pipe section 100 is used for connecting a water flow pipeline, and the measuring pipe section 100 is provided with a mounting hole 101. The ultrasonic sound beam reflection device is installed in the measuring pipe section 100, and a positioning hole groove 50 is formed in the reflector bracket 10 formed by splicing the first frame 11 and the second frame 12. The plug 300 passes through the mounting hole 101 of the measurement pipe section 100 and is matched with the positioning hole groove 50 on the reflector plate bracket 10 to fix the ultrasonic sound beam reflection device at a preset position of the measurement pipe section 100.

The locating hole slot 50 and the plug 300 enable axial positioning of the ultrasonic acoustic beam reflecting device within the measurement spool piece 100 (i.e., positioning along the length of the spool piece of the measurement spool piece 100).

In addition, in one embodiment, the axially extending inner wall of the measurement spool piece 100 is further provided with a locating flat 102. Meanwhile, the outer surfaces of the first groove section 111 and the second groove section 121 close to the splicing surfaces are also provided with a plane, and after the first groove section 111 and the second groove section 121 are spliced, the planes of the outer walls of the first groove section 111 and the second groove section 121 are spliced to form the support plane 60. After the ultrasonic sound beam reflection device is placed in the measurement pipe section 100, the support plane 60 is matched with the positioning plane 102, so that the ultrasonic sound beam reflection device is positioned on the circumference of the measurement pipe section 100.

Finally, simulation analysis is performed on the measurement pipe section 100 using the ultrasonic acoustic beam reflection device of the present embodiment, so as to obtain a simulation diagram of a flow trace of the fluid and a cloud diagram of a velocity distribution of the fluid. According to the flow trace simulation diagram and the speed distribution cloud diagram, in a liquid flow interval between the two first reflection sheets 20 and the second reflection sheet 30, namely in the sound path range of ultrasonic waves, the flow trace of water is stable, stable measurement of the ultrasonic waves is facilitated, the maximum speed is concentrated in the middle of the diameter reduction of the flow guide channel 13, the ultrasonic sound beam reflection device of the embodiment enables fluid in the flow guide channel to easily form laminar flow, turbulence can be reduced or even avoided as far as possible, and accordingly stability and accuracy of numerical values of ultrasonic measurement are facilitated to be improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An ultrasonic acoustic beam reflecting device installed in a measurement pipe section (100) of an ultrasonic water meter for reflecting ultrasonic waves, comprising:

a reflector bracket (10) including a first frame (11) and a second frame (12) that are assemblable; the first frame (11) comprises a first groove section (111) and a first left bracket (112) and a first right bracket (113) which are connected with two ends of the first groove section (111); the second frame (12) comprises a second groove section (121) and a second left bracket (122) and a second right bracket (123) which are connected with two ends of the second groove section (121); when the first frame (11) and the second frame (12) are in a split state, the first groove section (111) and the second groove section (121) are split to form a flow guide channel (13) for water to pass through, the first left bracket (112) and the second left bracket (122) are split to form a first mounting surface with a preset inclination angle on one surface facing the flow guide channel (13), and the first right bracket (113) and the second right bracket (123) are split to form a second mounting surface with a preset inclination angle on one surface facing the flow guide channel (13);

a first reflection sheet (20) and a second reflection sheet (30), the first reflection sheet (20) being mounted on the first mounting surface, the second reflection sheet (30) being mounted on the second mounting surface, reflection surfaces of the first reflection sheet (20) and the second reflection sheet (30) being arranged: after being reflected by the reflecting surface of the first reflecting sheet (20), the ultrasonic waves pass through the flow guide channel (13) to reach the second reflecting sheet (30), and then are reflected by the reflecting surface of the second reflecting sheet (30).

2. The ultrasonic acoustic beam reflection apparatus according to claim 1, wherein the reflector support (10) has a completely symmetrical structure about a vertical center plane in a length direction of the whole assembled structure when the first frame (11) and the second frame (12) are in an assembled state.

3. The ultrasonic sound beam reflection apparatus according to claim 2, wherein a pin (14) and a pin hole (15) are provided on a joint surface of the first frame (11) and the second frame (12), a pin (14) and a pin hole (15) are also provided on a joint surface of the second frame (12) and the first frame (11), and the first frame (11) and the second frame (12) are joined into an integral structure by matching the pin (14) and the pin hole (15).

4. An ultrasonic sound beam reflection apparatus according to claim 3, wherein the first frame (11) is of an integrally formed structure, and the second frame (12) is also of an integrally formed structure.

5. The ultrasonic acoustic beam reflecting device according to any one of claims 1 to 4, wherein the slope of the contour line of the upper half of the flow guide channel (13) changes from a finite negative value to zero and then from zero to a finite positive value in the flow direction of the water flow.

6. An ultrasonic sound beam reflection apparatus according to any one of claims 1 to 4, wherein the first left bracket (112) comprises at least two arms (1121) and a mounting plate (1122) provided inclined at a predetermined angle between the two arms (1121); the first right support (113), the second left support (122) and the second right support (123) have the same structure as the first left support (112);

the mounting plate (1122) of the first left support (112) and the mounting plate (1122) of the second left support (122) are spliced to form the first mounting surface on the surface facing the flow guide channel (13), and the mounting plate (1122) of the first right support (113) and the mounting plate (1122) of the second right support (123) are spliced to form the second mounting surface on the surface facing the flow guide channel (13).

7. The ultrasonic acoustic beam reflecting device according to claim 6, wherein the mounting plate (1122) is provided with groove structures (1123) on upper and lower sides thereof for engaging with edge portions of the first reflecting sheet (20) or the second reflecting sheet (30).

8. The ultrasonic sound beam reflection apparatus according to any one of claims 1 to 4, wherein the peripheral circumferential surface of the first groove section (111) is provided with a semi-circumferential groove, and the peripheral circumferential surface of the second groove section (121) is also provided with a semi-circumferential groove;

after the first groove section (111) and the second groove section (121) are spliced, a circumferential groove (18) is formed by splicing a semi-circumferential groove on the outer side of the first groove section (111) and a semi-circumferential groove on the outer side of the second groove section (121), and a sealing ring (40) is sleeved in the circumferential groove (18).

9. An ultrasonic water meter, comprising:

the measuring pipe section (100) is used for being connected into a water flow pipeline, and the measuring pipe section (100) is provided with a mounting hole (101);

the ultrasonic acoustic beam reflecting device according to any one of claims 1 to 8, which is installed in the measuring pipe section (100), and a positioning hole groove (50) is provided on the reflecting sheet support (10) which is formed by splicing the first frame (11) and the second frame (12);

and the plug (300) penetrates through the mounting hole (101) of the measuring pipe section (100) and is matched with the positioning hole groove (50) on the reflector plate bracket (10) so as to fix the ultrasonic sound beam reflection device at a preset position of the measuring pipe section (100).