Self-cleaning ultrasonic water meter and ultrasonic water meter combined pipe section

Abstract

The invention provides a self-cleaning ultrasonic water meter and an ultrasonic water meter combined pipe section, and belongs to the technical field of ultrasonic water meters, and the self-cleaning ultrasonic water meter comprises a water meter pipe section, a transducer, a threaded rod, a driving device and an annular brush. The radial direction of the first water meter pipe section serves as the first direction, and the radial direction perpendicular to the first direction serves as the second direction. Energy converter installation holes are formed in the pipe walls of the two sides of the water meter pipe section in the first direction respectively, and energy converters are installed in the energy converter installation holes. The two threaded rods are rotatably erected on the inner pipe walls, on the two sides of the water meter pipe section in the second direction, of the water meter pipe section respectively and extend in the axial direction, and one end of each threaded rod penetrates out of the water meter pipe section. The driving device is connected with the penetrating-out end of the threaded rod so as to drive the threaded rod to rotate. The annular brush is concentrically arranged in the water meter pipe section, the two opposite side portions of the annular brush are in threaded fit with the threaded rod, and elastic bristles are arranged on the outer wall of the annular brush. Cleaning of the inner wall of the water meter pipe section and directional cleaning of the surface of the transducer can be achieved, and long-term metering precision is maintained.

Description

Technical Field

[0001] The present application relates to the technical field of ultrasonic water meters, and in particular to a self-cleaning ultrasonic water meter and an ultrasonic water meter combined pipe section. Background Art

[0002] Ultrasonic water meter is a new type of water meter that measures flow based on the ultrasonic time difference method. Its working principle is to install ultrasonic transducers upstream and downstream of the measuring channel (i.e., pipe section), and these two transducers can transmit and receive ultrasonic signals to each other. When the ultrasonic signal is superimposed on the water flow signal, the propagation speed of the sound wave will change when it is downstream and upstream, resulting in different running times of the ultrasonic signal when it is downstream and upstream. By measuring these two time differences, we can calculate the flow velocity of the fluid, and then convert it into flow rate to achieve accurate flow measurement.

[0003] However, the long-term reliability of ultrasonic water meters in complex working conditions has always restricted the further development of this technology. For example, for large-caliber (generally referring to nominal diameter 50mm and above) ultrasonic water meters, if the installation environment is complex and harsh, the water quality is poor during use, and the transducer is immersed in water for a long time, it is easy to cause dirt and rust on the surface of the device, which will lead to large measurement accuracy errors and high product failure rates. Summary of the invention

[0004] The purpose of the present application is to provide a self-cleaning ultrasonic water meter and an ultrasonic water meter combined pipe section, which drives the annular brush to move axially in the water meter pipe section by driving the threaded rod, and uses elastic bristles to simultaneously achieve circumferential cleaning of the pipe wall and directional cleaning of the transducer surface. The integrated structural design ensures the stability of ultrasonic signal transmission and effectively maintains long-term metering accuracy.

[0005] In a first aspect, a self-cleaning ultrasonic water meter is provided, comprising a water meter pipe section, a transducer, a threaded rod, a driving device and an annular brush. A radial direction along the water meter pipe section is a first direction, the first direction is perpendicular to the axial direction of the water meter pipe section, and a radial direction perpendicular to the first direction is a second direction.

[0006] Wherein, transducer mounting holes are respectively arranged at the pipe walls on both sides of the water meter pipe section along the first direction, and the transducer is installed in the transducer mounting holes. Two threaded rods are respectively rotatably mounted on the inner pipe walls on both sides of the water meter pipe section along the second direction, and the threaded rod extends axially and one end thereof passes through the outside of the water meter pipe section. A driving device is arranged outside the water meter pipe section, and is connected to one end of the threaded rod passing through the outside of the water meter pipe section to drive the threaded rod to rotate. An annular brush is arranged in the water meter pipe section in a concentric distribution, and the opposite sides of the annular brush are threadedly matched with the two threaded rods, and a plurality of elastic bristles are arranged on the outer wall of the annular brush.

[0007] In an implementable solution, the water meter pipe section is provided with strip-shaped protrusions facing outward on the pipe walls on both sides along the second direction, the strip-shaped protrusions extend a predetermined length along the axial direction of the water meter pipe section, and a strip-shaped groove is provided inside the strip-shaped protrusions, and the strip-shaped grooves have strip-shaped openings facing the inner cavity of the water meter pipe section. Two threaded rods are respectively installed in the two strip-shaped grooves in a rotatable manner, and one end of the threaded rod passes through one end of the strip-shaped protrusions to the outside of the water meter pipe section. The driving device is connected to the end of the threaded rod passing through the outside of the water meter pipe section to drive the threaded rod to rotate. The annular brush includes a circular ring frame, the outer wall of the circular ring frame is provided with a plurality of elastic bristles, the outer wall of the circular ring frame is provided with two symmetrically distributed protrusions, and the protrusions are provided with threaded holes along the axial direction; the annular brush is arranged in the water meter pipe section, and the two protrusions pass through the strip-shaped openings and are placed in the strip-shaped grooves, and the threaded holes of the protrusions are threadedly matched with the threaded rods.

[0008] In an implementable solution, the width of the strip opening of the strip groove is smaller than the inner width of the strip groove, and the width of the connection between the protrusion of the annular brush and the circular ring frame is in a reduced diameter shape adapted to the strip opening.

[0009] In an implementable solution, the driving device includes a first motor and a second motor, which are respectively installed on the outer wall of the water meter pipe section and are respectively connected to one end of two threaded rods extending out of the water meter pipe section.

[0010] In an implementable solution, the driving device further includes a first speed meter and a second speed meter, the first speed meter is installed at the connection between the first motor and the threaded rod, and the second speed meter is installed at the connection between the second motor and the threaded rod.

[0011] In an implementable scheme, the driving device includes a gear box and a third motor; the gear box is installed on the outer wall of the water meter pipe section, and the gear box is provided with two rotating output ends with the same rotation speed, and the two rotating output ends are respectively connected to one end of two threaded rods passing through to the outside of the water meter pipe section; the third motor is connected to a gear in the gear box to drive the gear in the gear box to rotate.

[0012] In an implementable scheme, the water meter pipe section includes a first pipe section and a second pipe section that can be detachably spliced ​​with the first pipe section; each strip protrusion includes a first strip protrusion section and a second strip protrusion section, the first strip protrusion section is provided with a first strip groove section, and the second strip protrusion section is provided with a second strip groove section; after the first pipe section and the second pipe section are spliced, the first strip protrusion section and the second strip protrusion section are connected to form a strip protrusion, and the first strip groove section and the second strip groove section are connected to form a strip groove.

[0013] In an implementable solution, the first pipe section is an incoming flow pipe, the second pipe section is an outgoing flow pipe section, and the transducer mounting holes are all arranged in the first pipe section.

[0014] In an practicable solution, two inner circular edges of the circular frame of the annular brush are configured to be chamfered.

[0015] In a second aspect, an ultrasonic water meter combined pipe section is also provided, comprising the aforementioned self-cleaning ultrasonic water meter, and also comprising an electric switch valve and a control device. The electric switch valve is arranged on a pipeline connected to the water inlet end of the self-cleaning ultrasonic water meter, and the control device is connected to the electric switch valve and the drive device circuit of the self-cleaning ultrasonic water meter. When the control device controls the drive device to work, the electric switch valve is controlled to remain closed.

[0016] Compared with the prior art, the beneficial effects of the present application include at least the following: when the self-cleaning ultrasonic water meter of the present application performs the cleaning function, the driving device drives the threaded rod to perform synchronous rotational motion. Under the transmission action of the threaded pair, the annular brush makes a linear displacement along the axial direction of the water meter pipe section. During the movement, the elastic bristles arranged on the surface of the annular brush not only realize the circumferential cleaning of the inner wall of the pipe section, but also carry out directional cleaning treatment on the signal receiving and transmitting surface of the transducer when passing through the transducer mounting hole area. By integrating the threaded rod and the annular brush inside the water meter pipe section, the present solution can effectively remove the dirt and oxide layer deposited on the pipe wall, and at the same time can periodically maintain the cleanliness of the working surface of the transducer. The structural design ensures the smoothness of the ultrasonic signal transmission path, thereby maintaining the stability of the transducer receiving and transmitting signals, and ultimately ensures that the ultrasonic water meter maintains the measurement accuracy index in compliance with the specification requirements during long-term service.

[0017] At the same time, the annular brush has certain advantages in fluid dynamics due to its hollow annular structure and the absence of any obstruction on the inner side of the annular ring. When the fluid medium flows through the component, the inner side of the annular ring can still form a stable fluid flow channel, and the main body of the fluid is smoothly transmitted through the inner side of the annular ring, with only local low-intensity turbulence generated in the near-wall area around the annular brush. This structural design makes the fluid resistance coefficient relatively low, effectively maintaining the stability of the flow field in the pipe section. This fluid characteristic can maximize the maintenance of fluid dynamic characteristics while ensuring that the ultrasonic water meter can achieve the self-cleaning function of the pipe wall and the transducer surface, thereby effectively avoiding interference of flow distortion on the ultrasonic propagation path. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a stereoscopic diagram of a self-cleaning ultrasonic water meter shown in Example 1 of the present application.

[0020] Figure 2 for Figure 1 Top view of the self-cleaning ultrasonic water meter.

[0021] Figure 3 for Figure 1 Front view of the self-cleaning ultrasonic water meter.

[0022] Figure 4 For along Figure 2 The AA in the middle is a three-dimensional image of the pipe section of the self-cleaning ultrasonic water meter.

[0023] Figure 5 for Figure 4 Front view of the self-cleaning ultrasonic water meter.

[0024] Figure 6 For along Figure 3 A three-dimensional image of the self-cleaning ultrasonic water meter after the pipe section is cut away.

[0025] Figure 7 for Figure 6 Top view of the self-cleaning ultrasonic water meter.

[0026] Figure 8 For along Figure 2 Cross-sectional view of MM.

[0027] Fig. 9 This is a stereoscopic view of a first pipe segment shown in an embodiment of the present application.

[0028] Fig.10 This is a stereoscopic view of a second pipe segment shown in an embodiment of the present application.

[0029] Fig.11 This is a three-dimensional diagram of a ring-shaped brush shown in an embodiment of the present application.

[0030] Fig.12 This is a three-dimensional diagram of the matching state of the annular brush and two threaded rods shown in an embodiment of the present application.

[0031] Fig.13 for Figure 1 Exploded view of the self-cleaning ultrasonic water meter from the first perspective.

[0032] Fig.14 for Figure 1 Exploded view of the self-cleaning ultrasonic water meter from the second perspective.

[0033] Fig.15 This is a stereoscopic diagram of a self-cleaning ultrasonic water meter shown in Example 2 of the present application.

[0034] Fig.16 for Fig.15 Exploded view of the self-cleaning ultrasonic water meter.

[0035] Fig.17 for Fig.15 Top view of the self-cleaning ultrasonic water meter.

[0036] Fig.18 For along Fig.17 A three-dimensional image of the self-cleaning ultrasonic water meter after the pipe section is cut away by CC.

[0037] Fig.19 for Fig.18 Schematic diagram of the internal structure of the gearbox.

[0038] Fig. 20 This is a schematic diagram of the composition of an ultrasonic water meter combined pipe section shown in Example 3 of the present application.

[0039] In the figure: 1, water meter pipe section; 101, first pipe section; 102, second pipe section; 11, transducer mounting hole; 12, strip protrusion; 121, first strip protrusion section; 122, second strip protrusion section; 13, strip groove; 131, first strip groove section; 132, second strip groove section; 14, strip opening; 2, transducer; 3, threaded rod; 4, driving device; 411, first motor; 412, second motor; 421, gear box; 422, third motor; 423, rotating output end; 5, annular brush; 51, elastic bristles; 52, circular ring frame; 53, protrusion; 54, threaded hole; 6, electric switch valve; 7, control device; L1, first direction; L2, second direction; L3, axial direction of water meter pipe section. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0042] like Figure 4 and Fig.18As shown, the present application provides a self-cleaning ultrasonic water meter, which includes a water meter pipe section 1, a transducer 2, a threaded rod 3, a driving device 4 and an annular brush 5. A radial direction along the water meter pipe section 1 is a first direction L1, the first direction L1 is perpendicular to the axial direction L3 of the water meter pipe section, and a radial direction perpendicular to the first direction L1 is a second direction L2.

[0043] The water meter pipe section 1 is provided with transducer mounting holes 11 at the pipe walls on both sides along the first direction L1, and the transducer 2 is installed in the transducer mounting holes 11. Two threaded rods 3 are rotatably mounted on the inner pipe walls on both sides of the water meter pipe section 1 along the second direction L2, and the threaded rod 3 extends axially and one end thereof passes through the outside of the water meter pipe section 1. The driving device 4 is arranged outside the water meter pipe section 1, and is connected to one end of the threaded rod 3 passing through the outside of the water meter pipe section 1 to drive the threaded rod 3 to rotate. The annular brush 5 is arranged in the water meter pipe section 1 in a concentric distribution, and the opposite sides of the annular brush 5 are threadedly matched with the two threaded rods 3, and the outer wall of the annular brush 5 is provided with a plurality of elastic bristles 51.

[0044] When the self-cleaning ultrasonic water meter of the present application performs the cleaning function, the driving device 4 drives the threaded rod 3 to perform synchronous rotational motion. Under the transmission action of the threaded pair, the annular brush 5 makes a linear displacement along the axial direction of the water meter pipe section 1. During the movement, the elastic bristles 51 arranged on the surface of the annular brush 5 not only realize the circumferential cleaning of the inner wall of the pipe section, but also implement directional cleaning treatment on the signal receiving and transmitting surface of the transducer 2 when passing through the transducer mounting hole 11 area. By integrating the threaded rod 3 and the annular brush 5 inside the water meter pipe section 1, this solution can effectively remove the dirt and oxide layer deposited on the pipe wall, and at the same time can periodically maintain the cleanliness of the transducer working surface. This structural design ensures the smoothness of the ultrasonic signal transmission path, thereby maintaining the stability of the transducer receiving and transmitting signals, and ultimately ensures that the ultrasonic water meter maintains the measurement accuracy indicators in compliance with the specification requirements during long-term service.

[0045] At the same time, the annular brush 5 has certain advantages in fluid dynamics due to its hollow annular structure and no obstruction on the inner side of the annular ring. When the fluid medium flows through the component, the inner side of the annular ring can still form a stable fluid flow channel, and the main body of the fluid is smoothly transmitted through the inner side of the annular ring, and only local low-intensity turbulence is generated in the near-wall area of ​​the outer periphery of the annular brush 5. This structural design makes the fluid resistance coefficient relatively low, effectively maintaining the stability of the flow field in the pipe section. This fluid characteristic can maximize the maintenance of fluid dynamic characteristics while ensuring that the ultrasonic water meter realizes the self-cleaning function of the pipe wall and the transducer surface, and avoids interference of flow state distortion on the ultrasonic propagation path.

[0046] In order to explain the structure and working principle of the self-cleaning ultrasonic water meter in more detail, the present application provides the following embodiments. It should be noted that the technical features and technical solutions in the following embodiments can be used in combination with each other without conflict.

[0047] Embodiment 1

[0048] like Figures 1 to 14 As shown, this embodiment provides a self-cleaning ultrasonic water meter, which includes a water meter pipe section 1, a transducer 2, a threaded rod 3, a driving device 4 and an annular brush 5. A radial direction along the water meter pipe section 1 is a first direction L1, the first direction L1 is perpendicular to the axial direction L3 of the water meter pipe section, and a radial direction perpendicular to the first direction L1 is a second direction L2.

[0049] Wherein, transducer mounting holes 11 are respectively arranged at the pipe walls on both sides of the water meter pipe section 1 along the first direction L1 , and the transducer 2 is installed in the transducer mounting holes 11 .

[0050] The water meter pipe section 1 is provided with strip protrusions 12 facing outward on the pipe walls on both sides along the second direction L2, and the strip protrusions 12 extend a predetermined length along the axial direction L3 of the water meter pipe section 1, and a strip groove 13 is provided inside the strip protrusion 12, and the strip groove 13 has a strip opening 14 facing the inner cavity of the water meter pipe section 1. Two threaded rods 3 are respectively installed in the two strip grooves 13 in a rotatable manner, and one end of the threaded rod 3 passes through one end of the strip protrusion 12 to the outside of the water meter pipe section 1. The driving device 4 is connected to one end of the threaded rod 3 passing through the outside of the water meter pipe section 1 to drive the threaded rod 3 to rotate.

[0051] The annular brush 5 includes a circular frame 52, a plurality of elastic bristles 51 are arranged on the outer wall of the circular frame 52, two symmetrically distributed protrusions 53 are arranged on the outer wall of the circular frame 52, and the protrusions 53 are provided with axially threaded holes 54; the annular brush 5 is arranged in the water meter pipe section 1, and the two protrusions 53 pass through the strip opening 14 and are placed in the strip groove 13, and the threaded holes 54 of the protrusions 53 are threadedly matched with the threaded rod 3.

[0052] It should be noted that the transducer mounting holes 11 can be set to one pair or more pairs (the figure shows a two-pair solution). After the transducer 2 is installed in the transducer mounting hole 11, its signal receiving and transmitting surface is generally not flush with the inner tube wall (generally, the signal receiving and transmitting surface does not exceed the inner tube wall). The outer diameter of the elastic bristles 51 of the annular brush 5 in the unrestrained state is larger than the inner diameter of the water meter pipe section 1. Therefore, when the annular brush 5 passes through the position of the transducer mounting hole 11, the elastic bristles 51 at the corresponding position will extend into the transducer mounting hole 11 and contact the signal receiving and transmitting surface of the transducer 2 to achieve a cleaning effect.

[0053] It should also be noted that a micro bearing may be provided at one end of the threaded rod 3 located inside the strip groove 13, and the micro bearing is installed by opening a groove in the strip groove 13. A rotary seal structure is used at the position where the threaded rod 3 passes through the strip protrusion 12.

[0054] In this embodiment, the outer diameter of the ring frame 52 is D1, the inner diameter of the water meter pipe section 1 is D2, D1<D2, and D2-D1≤5mm can be set. In addition, the nominal diameter of the ultrasonic water meter of this embodiment is preferably set to a size of 50mm or more. The length of the elastic bristles 51 is greater than D2-D1.

[0055] In this embodiment, it is preferred that the maximum distance between the signal receiving and transmitting surface of the transducer 2 and the inner wall of the water meter pipe section 1 is set to be no more than 5 mm, and the length of the elastic bristles 51 is set in the range of 6 mm to 15 mm.

[0056] In this embodiment, the elastic bristles 51 can be made of polyetheretherketone ultrafine bristles, silicone coated carbon fiber bristles, nano-ceramic fiber mixed bristles, etc., or a mixture of bristles of multiple materials. For example, the monofilament diameter of polyetheretherketone ultrafine bristles can be 0.10±0.02mm, and the density can be set to 1800-2000 roots / cm², which is suitable for removing hard scale. For another example, the silicone coated carbon fiber bristles are a composite structure, the core material can be T700 grade carbon fiber with a diameter of about 50μm, the coating layer can be 80±10μm medical grade silicone, and the density can be set to 500-2000 roots / cm², which is suitable for removing sticky impurities. For another example, the nano-ceramic fiber mixed bristles can be formed by mixing and weaving 70% zirconium oxide ceramic fibers (diameter 0.08mm) and 30% polytetrafluoroethylene (PTFE) filaments, and its density can be set to 800~2500 roots / cm², which is more suitable for removing colloidal particles. It should be noted that the bristle diameter, arrangement density, and density ratio when multiple bristles are used in combination can be reasonably selected and set according to the water quality.

[0057] In this embodiment, if Figure 8 , Fig. 9 , Fig.10 , Fig.11 As shown, the width of the strip opening 14 of the strip groove 13 is preferably set to be smaller than the internal width of the strip groove 13, and the width of the connection between the protrusion 53 of the annular brush 5 and the circular ring frame 52 is in a reduced diameter shape adapted to the strip opening 14. This structure can reduce the size of the strip opening 14 as much as possible while ensuring transmission stability, reduce the disturbance effect on the fluid in the convection channel, and ensure the accuracy of ultrasonic measurement.

[0058] In this embodiment, if Figure 3As shown, the driving device 4 may include a first motor 411 and a second motor 412, the first motor 411 and the second motor 412 are respectively installed on the outer wall of the water meter pipe section 1, and are respectively connected to one end of the two threaded rods 3 that pass through the outside of the water meter pipe section 1. In the preferred embodiment, the driving device 4 also includes a first speedometer and a second speedometer, the first speedometer is installed at the connection between the first motor 411 and the threaded rod 3 (not shown in the figure), and the second speedometer is installed at the connection between the second motor 412 and the threaded rod 3 (not shown in the figure). The rotation speeds of the first motor 411 and the second motor 412 are obtained by the first speedometer and the second speedometer, and are sent to a control device to adjust the rotation speeds of the first motor 411 and the second motor 412 to ensure the synchronous rotation of the two threaded rods 3.

[0059] In this embodiment, if Figures 1 to 7 As shown in the figure, the water meter pipe section 1 may include a first pipe section 101 and a second pipe section 102 detachably connected to the first pipe section 101. Fig. 9 and Fig.10 As shown, each strip protrusion 12 includes a first strip protrusion segment 121 and a second strip protrusion segment 122, the first strip protrusion segment 121 is provided with a first strip groove segment 131, and the second strip protrusion segment 122 is provided with a second strip groove segment 132. After the first pipe segment 101 and the second pipe segment 102 are spliced, the first strip protrusion segment 121 and the second strip protrusion segment 122 are butted together to form the strip protrusion 12, and the first strip groove segment 131 and the second strip groove segment 132 are butted together to form the strip groove 13.

[0060] This embodiment sets a spliced ​​pipe section structure of the first pipe section 101 and the second pipe section 102, which reduces the difficulty of installing the threaded rod 3 and the annular brush 5 and improves the subsequent maintainability. For example, the annular brush 5 in this solution can set the maintenance and replacement cycle of the annular brush 5 according to the life and usage of the bristles, or according to the change of measurement accuracy. By splitting the first pipe section 101 and the second pipe section 102, the old annular brush can be removed and replaced with a new one.

[0061] In this embodiment, if Figure 1 As shown, the first pipe section 101 is an incoming flow pipe, the second pipe section 102 is an outgoing flow pipe section, and the transducer mounting holes 11 are all arranged in the first pipe section 101. The structural arrangement here is equivalent to arranging the joint seam between the first pipe section 101 and the second pipe section 102 downstream of the pipe section where the transducer 2 is located, thereby avoiding the noise impact that may be caused by the joint seam between the first pipe section 101 and the second pipe section 102.

[0062] In addition, in this embodiment, during the non-cleaning period, the annular brush 5 is preferably located downstream of the pipe section where the transducer 2 is located, so as to effectively reduce the influence of the fluid disturbance generated by the annular brush 5 on the measurement.

[0063] In this embodiment, if Fig.11 As shown, the two inner circular edges of the circular frame 52 of the annular brush 5 are arranged to be chamfered, thereby reducing the interference of the circular frame 52 structure on the incoming flow.

[0064] In this embodiment, the difference between the inner diameter and the outer diameter of the circular ring frame 52 of the annular brush 5 does not exceed 10 mm, and is preferably set to be no more than 5 mm.

[0065] In this embodiment, the annular frame 52 can be made of a metal material that is corrosion-resistant, has good bending resistance, and has high strength, such as austenitic stainless steel 316L, duplex stainless steel 2205, titanium alloy, etc.

[0066] Since the thickness of the circular ring frame 52 of the annular brush 5 is relatively small and close to the inner wall of the pipe section, and the two inner circular edges of the circular ring frame 52 are chamfered, when the fluid medium flows through the component, the inner side of the annular ring can basically form a stable laminar flow state, thereby ensuring the stability of ultrasonic transmission. Moreover, when the annular brush 5 is in a non-clean state, placing it downstream of the transducer 2 can also reduce the impact to a certain extent. Furthermore, since this solution is aimed at large-caliber ultrasonic water meters with a nominal diameter of 50 mm and above, the slight disturbance of the water flow caused by the structure of the annular brush 5 will not have a significant impact on the flow measurement.

[0067] In addition, when the annular brush 5 is in the cleaning state, the flow of fluid is cut off and the ultrasonic measurement is suspended for a short time to avoid the influence of the movement of the annular brush 5 on the ultrasonic measurement.

[0068] Embodiment 2

[0069] like Figures 15 to 18 As shown, this embodiment also provides a self-cleaning ultrasonic water meter, which is different from the first embodiment in that the driving device 4 of the present application includes a gear box 421 and a third motor 422 .

[0070] Specifically, Fig.18 As shown, the gear box 421 is installed on the outer wall of the water meter pipe section 1, and the gear box 421 is provided with two rotating output ends 423 with the same rotation speed, and the two rotating output ends 423 are respectively connected to one end of the two threaded rods 3 passing through to the outside of the water meter pipe section 1; the third motor 422 is connected to a gear in the gear box 421 to drive the gear in the gear box 421 to rotate.

[0071] In this embodiment, the gear box 421 is set as an independent device. After the annular brush 5 and the threaded rod 3 are installed, the first pipe section 101 and the second pipe section 102 are spliced, and one end of the two threaded rods 3 are respectively passed through one end of the strip protrusion 12. The pipe section is reserved with a mounting position for the gear box 421. After the gear box 421 is installed on the mounting position, the two rotating output ends 423 are connected to the ends of the two threaded rods 3 in the form of through-hole plugging, thereby achieving quick installation. At the same time, the detachable structure of the gear box 421 is also convenient for subsequent maintenance and care.

[0072] In this embodiment, Fig.19 As shown, the gear box 421 may include a driving gear A1, the third motor 422 drives the driving gear A1 to rotate, and the two rotating output ends 423 are respectively provided with a terminal gear A3, and a plurality of transition transmission gears A2 are provided between the driving gear A1 and the terminal gear A3. The transmission ratio of the two-way gear transmission (driving gear A1 to the terminal gear A3) is the same, so the two threaded rods 3 driven by a third motor 422 can also keep synchronous rotation at the same speed, which helps to ensure the smooth movement and precise displacement of the annular brush 5.

[0073] Embodiment 3

[0074] like Fig. 20 As shown, this embodiment provides an ultrasonic water meter combined pipe section, including the self-cleaning ultrasonic water meter in the first embodiment or the second embodiment, and also includes an electric switch valve 6 and a control device 7.

[0075] Specifically, the electric switch valve 6 is arranged on the pipeline connected to the water inlet end of the self-cleaning ultrasonic water meter, and the control device 7 is connected to the electric switch valve 6 and the driving device 4 of the self-cleaning ultrasonic water meter. When the control device 7 controls the driving device 4 to work, the electric switch valve 6 is controlled to remain closed, thereby ensuring that the flow in the pipe section is stopped during cleaning, which can ensure the cleaning effect and reduce the impact on ultrasonic measurement.

[0076] In addition, the control device 7 is also connected to the transducer 2 circuit. If it is detected that the transducer signal is significantly attenuated and the signal integrity is lower than a predetermined value (for example, 50%) for a long time, the automatic cleaning mode is turned on, and the control device 7 controls the drive device 4 to drive the annular brush 5 for cleaning.

[0077] In this embodiment, the modes of automatic cleaning, timed cleaning and key cleaning can be set by the control device 7. In automatic cleaning, the start of automatic cleaning is determined by detecting and judging the integrity of the transducer signal. In timed cleaning, cleaning is set once a week, once a month, etc. In key cleaning, an external button is set, and the operation button sends a signal to the control device 7 to control cleaning.

[0078] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A self-cleaning ultrasonic water meter, characterized in that: include: A water meter pipe section (1) is provided with transducer mounting holes (11) at the pipe walls on both sides along a first direction; the first direction is along the radial direction of the water meter pipe section (1); A transducer (2) is installed in the transducer installation hole (11); A threaded rod (3), wherein two threaded rods (3) are respectively rotatably mounted on the inner tube wall of the water meter pipe section (1) on both sides along a second direction, and the threaded rod (3) extends axially and one end thereof passes through the outside of the water meter pipe section (1); the second direction is along a radial direction perpendicular to the first direction; A driving device (4) is arranged outside the water meter pipe section (1) and is connected to one end of the threaded rod (3) extending outside the water meter pipe section (1) to drive the threaded rod (3) to rotate; An annular brush (5) is arranged in a concentric distribution in the water meter pipe section (1); two opposite sides of the annular brush (5) are threadedly engaged with the two threaded rods (3); and a plurality of elastic bristles (51) are arranged on the outer wall of the annular brush (5).

2. The self-cleaning ultrasonic water meter according to claim 1, characterized in that: The water meter pipe section (1) is provided with strip-shaped protrusions (12) facing outwards on the pipe walls on both sides along the second direction, the strip-shaped protrusions (12) extending axially along the water meter pipe section (1) by a predetermined length, the strip-shaped protrusions (12) are provided with strip-shaped grooves (13) inside, and the strip-shaped grooves (13) have strip-shaped openings (14) facing the inner cavity of the water meter pipe section (1); The two threaded rods (3) are respectively rotatably mounted in the two strip-shaped grooves (13), and one end of the threaded rod (3) passes through one end of the strip-shaped protrusion (12) to the outside of the water meter pipe section (1); The driving device (4) is connected to one end of the threaded rod (3) extending outward from the water meter pipe section (1) to drive the threaded rod (3) to rotate; The annular brush (5) comprises an annular frame (52), the outer wall of the annular frame (52) being provided with a plurality of the elastic bristles (51), the outer wall of the annular frame (52) being provided with two symmetrically distributed protrusions (53), the protrusions (53) being provided with threaded holes (54) along the axial direction; the annular brush (5) is arranged in the water meter pipe section (1), and the two protrusions (53) pass through the strip opening (14) and are placed in the strip groove (13), and the threaded holes (54) of the protrusions (53) are threadably matched with the threaded rod (3).

3. The self-cleaning ultrasonic water meter according to claim 2, characterized in that: The width of the strip opening (14) of the strip groove (13) is smaller than the internal width of the strip groove (13), and the width of the connection between the protrusion (53) of the annular brush (5) and the circular ring frame (52) is in a reduced diameter shape adapted to the strip opening (14).

4. The self-cleaning ultrasonic water meter according to claim 2, characterized in that: The driving device (4) comprises a first motor (411) and a second motor (412); the first motor (411) and the second motor (412) are respectively mounted on the outer wall of the water meter pipe section (1) and are respectively connected to one end of the two threaded rods (3) extending outward from the water meter pipe section (1).

5. The self-cleaning ultrasonic water meter according to claim 4, characterized in that: The driving device (4) further comprises a first speed meter and a second speed meter, wherein the first speed meter is installed at the connection between the first motor (411) and the threaded rod (3), and the second speed meter is installed at the connection between the second motor (412) and the threaded rod (3).

6. The self-cleaning ultrasonic water meter according to claim 2, characterized in that: The driving device (4) comprises a gear box (421) and a third motor (422); The gear box (421) is mounted on the outer wall of the water meter pipe section (1), and the gear box (421) is provided with two rotating output ends (423) with the same rotation speed, and the two rotating output ends (423) are respectively connected to one end of the two threaded rods (3) passing through to the outside of the water meter pipe section (1); The third motor (422) is connected to a gear in the gear box (421) to drive the gear in the gear box (421) to rotate.

7. The self-cleaning ultrasonic water meter according to claim 2, characterized in that: The water meter pipe section (1) comprises a first pipe section (101) and a second pipe section (102) detachably connected to the first pipe section (101); Each of the strip-shaped protrusions (12) comprises a first strip-shaped protrusion segment (121) and a second strip-shaped protrusion segment (122); the first strip-shaped protrusion segment (121) is provided with a first strip-shaped groove segment (131); and the second strip-shaped protrusion segment (122) is provided with a second strip-shaped groove segment (132); After the first pipe section (101) and the second pipe section (102) are spliced ​​together, the first strip-shaped protrusion section (121) and the second strip-shaped protrusion section (122) are butted together to form the strip-shaped protrusion (12), and the first strip-shaped groove section (131) and the second strip-shaped groove section (132) are butted together to form the strip-shaped groove (13).

8. The self-cleaning ultrasonic water meter according to claim 7, characterized in that: The first pipe section (101) is an incoming flow pipe, the second pipe section (102) is an outgoing flow pipe section, and the transducer mounting holes (11) are all arranged in the first pipe section (101).

9. The self-cleaning ultrasonic water meter according to claim 2, characterized in that: The two inner circular edges of the circular frame (52) of the annular brush (5) are arranged in a chamfered shape.

10. An ultrasonic water meter combined pipe section, characterized in that: include: A self-cleaning ultrasonic water meter as claimed in any one of claims 1 to 9; An electric switch valve (6) is arranged on a pipeline connected to the water inlet end of the self-cleaning ultrasonic water meter; A control device (7) connected to the electric switch valve (6) and the drive device (4) of the self-cleaning ultrasonic water meter; Wherein, when the control device (7) controls the driving device (4) to work, it controls the electric switch valve (6) to remain closed.

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