Dual-channel flow metering module and ultrasonic water meter

Abstract

The application provides a double-channel flow metering module and an ultrasonic water meter. The double-channel flow metering module comprises a cylindrical pipeline, a rotating support and a fixed support. The fixed support is provided with a first inner channel, and the rotating support is provided with a second inner channel. At least part of the fixed support is embedded in the second inner channel, and the first inner channel constitutes an inner channel. The fixed support is provided with a first outer channel groove, and the rotating support is provided with a second outer channel groove. The rotating support can make axial rotation movement along the axial direction of the cylindrical pipeline, so as to make the first outer channel groove and the second outer channel groove in a connected state or a disconnected state. The double-channel flow metering module and the ultrasonic water meter provided by the application can solve the problem of how to increase the flow metering range and the range ratio of the ultrasonic water meter.

Description

Technical Field

[0001] This invention relates to the field of metering instrument technology, and in particular to a dual-channel flow metering module and an ultrasonic water meter. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] Ultrasonic water meters measure flow based on the principle that sound waves carry flow velocity information as they propagate through fluids. The propagation velocity difference method utilizes the difference in propagation velocity of ultrasonic waves as they travel upstream and downstream in a pipe to measure flow. The propagation velocity of ultrasonic waves in a fluid is directly related to the fluid velocity; the higher the fluid velocity, the faster the ultrasonic waves propagate, and the higher the measurement accuracy of the ultrasonic water meter. Therefore, to increase the fluid velocity, the pipe diameter of ultrasonic water meters is generally reduced. However, the fluid velocity is not unlimited; excessive velocity can affect the integrity and strength of the signal received by the transducer. Therefore, ultrasonic water meters typically have two endpoint velocities, corresponding to an optimal flow measurement range.

[0004] The range ratio R is the ratio of the commonly used flow rate Q3 to the minimum flow rate Q1. The range ratio R, commonly used flow rate Q3, and minimum flow rate Q1 are important metrics for the metering accuracy and flow measurement range of ultrasonic water meters. To increase the range ratio R of an ultrasonic water meter, Q3 must be increased or Q1 must be decreased. However, for manufacturers, decreasing Q1 is quite difficult.

[0005] Therefore, how to increase the range ratio R and flow measurement range of ultrasonic water meters has become an urgent technical problem to be solved. Summary of the Invention

[0006] The objective of this invention is to at least solve the problem of how to increase the flow measurement range and range ratio of ultrasonic water meters. This objective is achieved through the following technical solution:

[0007] The first aspect of this invention proposes a dual-channel flow metering module, comprising: a cylindrical pipe, a rotating bracket, and a fixed bracket; the cylindrical pipe has a cavity, the fixed bracket is fixedly disposed within the cavity and its outer side abuts against the inner wall of the cylindrical pipe, the rotating bracket is disposed within the cavity and its outer side abuts against the inner wall of the cylindrical pipe; the fixed bracket has a first inner channel, the rotating bracket has a second inner channel, at least a portion of the fixed bracket is embedded in the second inner channel, the first inner channel forming the inner channel; the fixed bracket has a first outer channel groove, the rotating bracket has a second outer channel groove, the rotating bracket is capable of rotating along the axial direction of the cylindrical pipe to allow the first outer channel groove and the second outer channel groove to be in a connected or disconnected state, and the first outer channel groove and the second outer channel groove together form the outer channel when in the connected state.

[0008] The dual-channel flow metering module provided by the present invention has an inner channel that is always open. By placing a fixed bracket and a rotating bracket inside the cavity and abutting against the inner wall of the cylindrical pipe, the rotating bracket is driven to keep the first outer channel groove and the second outer channel groove in a connected or disconnected state, thereby changing the opening and closing state of the outer channel. During the metering process of the dual-channel flow metering module, when the flow rate is large, the outer channel is kept open to increase the cross-sectional area of ​​the cylindrical pipe and reduce the fluid velocity. When the flow rate is small, the outer channel is kept closed to reduce the cross-sectional area of ​​the cylindrical pipe and increase the fluid velocity. Therefore, given that existing ultrasonic water meters only have an inner channel, while keeping the flow velocity range constant, the flow cross-sectional area of ​​the cylindrical pipe can be increased by keeping the outer channel open, thereby increasing the flow rate passing through the cylindrical pipe and ultimately increasing the flow metering range and range ratio.

[0009] In summary, the dual-channel flow metering module of the present invention effectively solves the problem of how to increase the flow metering range and range ratio of ultrasonic water meters.

[0010] In addition, the dual-channel flow metering module according to the present invention may also have the following additional technical features:

[0011] In some embodiments of the present invention, the fixing bracket includes a first cylindrical portion and a second cylindrical portion, the first cylindrical portion is sleeved on the outer side of the second cylindrical portion, the second cylindrical portion is provided with the first inner channel, and the outer side of the second cylindrical portion and the first cylindrical portion together form the first outer channel groove.

[0012] In some embodiments of the present invention, the rotating bracket is a third cylindrical portion, the third cylindrical portion having a second inner channel and a second outer channel groove, and at least a portion of the second cylindrical portion is inserted into the second inner channel.

[0013] In some embodiments of the present invention, the dual-channel flow metering module further includes a reflector bracket, the reflector bracket being fixedly disposed within the cavity and the outer side of the reflector bracket abutting against the inner wall of the cylindrical pipe, the number of the reflector brackets being two, and the rotating bracket and the fixed bracket being clamped between the two reflector brackets.

[0014] In some embodiments of the present invention, the reflector support is provided with a third inner channel and a third outer channel groove, wherein the first inner channel and the third inner channel are always in a connected state;

[0015] Along the axial direction of the cylindrical pipe, the first outer channel groove and the two third outer channel grooves are always on the same straight line.

[0016] In some embodiments of the present invention, the reflector bracket includes a fourth cylindrical portion and a bracket portion, the fourth cylindrical portion and the bracket portion are connected, the fourth cylindrical portion is provided with a third inner channel and a third outer channel groove, the bracket portion is provided with a receiving space, and the receiving space is respectively connected to the third inner channel and the third outer channel groove.

[0017] In some embodiments of the present invention, the radial dimension of the first inner channel gradually decreases along the axial direction from the inlet to the outlet of the cylindrical pipe.

[0018] In some embodiments of the present invention, the dual-channel flow metering module further includes a transmission structure, which passes through the cylindrical pipe and is connected to the rotating bracket.

[0019] In some embodiments of the present invention, the transmission structure includes a transmission gear, the outer side of the rotating bracket is provided with a motion groove, and the side wall of the motion groove is provided with a tooth profile surface that cooperates with the transmission gear.

[0020] A second aspect of the present invention provides an ultrasonic water meter, comprising a dual-channel flow metering module as described in any of the preceding claims, wherein the dual-channel flow metering module is disposed within the ultrasonic water meter.

[0021] The ultrasonic water meter and the dual-channel flow metering module of the present invention have the same advantages, which will not be repeated here. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0023] Figure 1 A schematic diagram of the disassembled structure of a dual-channel flow metering module according to an embodiment of the present invention is shown.

[0024] Figure 2 A schematic diagram of the structure of a dual-channel flow metering module according to an embodiment of the present invention is shown.

[0025] Figure 3 A partial structural schematic diagram of a dual-channel flow metering module according to an embodiment of the present invention is shown.

[0026] Figure 4 A schematic diagram of the structure of a cylindrical pipe according to an embodiment of the present invention is shown.

[0027] Figure 5 A schematic diagram of the structure of a rotating support according to an embodiment of the present invention is shown.

[0028] Figure 6 A schematic diagram of the structure of the fixing bracket according to an embodiment of the present invention is shown.

[0029] Figure 7 A schematic diagram of the structure of a reflective sheet support according to an embodiment of the present invention is shown.

[0030] Figure 8 A schematic diagram illustrating the installation of a transmission structure according to an embodiment of the present invention is shown.

[0031] Figure 9 A schematic diagram of the structure of a transmission gear according to an embodiment of the present invention is shown.

[0032] Figure 10 A schematic diagram of the structure of a rotating shaft according to an embodiment of the present invention is shown.

[0033] Figure 11 A schematic diagram of the structure of a shaft seal ring according to an embodiment of the present invention is shown.

[0034] Figure 12 A schematic diagram of the structure of a cover plate according to an embodiment of the present invention is shown.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10 is a dual-channel flow metering module;

[0037] 1 is a cylindrical pipe, 11 is a pipe cavity, 12 is a transducer mounting hole, 13 is a positioning hole, 14 is a threaded hole, 15 is a shaft groove, 16 is a threaded groove, and 17 is a mating thread.

[0038] 2 is a rotating support, 21 is the third cylindrical part, 22 is the second inner channel, 23 is the second outer channel groove, and 24 is the motion groove;

[0039] 3 is a fixed bracket, 31 is a first cylindrical part, 311 is a first outer channel groove, 32 is a second cylindrical part, and 33 is a first inner channel;

[0040] 4 is the reflector support, 41 is the fourth cylindrical part, 411 is the third inner channel, 412 is the third outer channel groove, 413 is the support fixing groove, 414 is the sealing ring groove, 42 is the support part, 421 is the reflector mounting groove, and 422 is the accommodating space.

[0041] 5 is the transmission structure, 51 is the transmission gear, 511 is the mating groove, 52 is the rotating shaft, 521 is the main drive rod, 522 is the driven rod, 523 is the rotating part, 5231 is the mating groove, 53 is the rotating shaft sealing ring, 531 is the mating retaining ring, 54 is the cover plate, 541 is the mating hole, and 542 is the tightening thread.

[0042] 6 is the bracket fixing screw; 7 is the bracket sealing ring. Detailed Implementation

[0043] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0044] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0045] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0046] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0047] See Figure 1 , Figure 2 as well as Figure 3 As shown, the first aspect of the present invention proposes a dual-channel flow metering module 10, comprising: a cylindrical pipe 1, a rotating bracket 2, and a fixed bracket 3; the cylindrical pipe 1 has a cavity 11, the fixed bracket 3 is fixedly disposed in the cavity 11 and the outer side of the fixed bracket 3 abuts against the inner wall of the cylindrical pipe 1, the rotating bracket 2 is disposed in the cavity 11 and the outer side of the rotating bracket 2 abuts against the inner wall of the cylindrical pipe 1; the fixed bracket 3 has a first inner channel 33, the rotating bracket 2 has a second inner channel 22, at least a portion of the fixed bracket 3 is embedded in the second inner channel 22, the first inner channel 33 constitutes the inner channel; the fixed bracket 3 has a first outer channel groove 311, the rotating bracket 2 has a second outer channel groove 23, the rotating bracket 2 can rotate along the axial direction of the cylindrical pipe 1 to make the first outer channel groove 311 and the second outer channel groove 23 in a connected state or a disconnected state, and the first outer channel groove 311 and the second outer channel groove 23 together constitute the outer channel when in a connected state.

[0048] The dual-channel flow metering module 10 provided by the present invention has an inner channel that is always open. By placing a fixed bracket 3 and a rotating bracket 2 in the cavity 11 and abutting against the inner wall of the cylindrical pipe 1, the rotating bracket 2 is driven to make the first outer channel groove 311 and the second outer channel groove 23 either connected or disconnected, thereby changing the opening and closing state of the outer channel. During the metering process of the dual-channel flow metering module 10, when the flow rate is large, the outer channel is opened to increase the cross-sectional area of ​​the cylindrical pipe 1 and reduce the fluid velocity. When the flow rate is small, the outer channel is closed to reduce the cross-sectional area of ​​the cylindrical pipe 1 and increase the fluid velocity. Therefore, given that existing ultrasonic water meters only have an inner channel, when the flow velocity range remains unchanged, the flow cross-sectional area of ​​the cylindrical pipe 1 can be increased by opening the outer channel, thereby increasing the flow rate passing through the cylindrical pipe 1, and ultimately increasing the flow metering range and range ratio.

[0049] In summary, the dual-channel flow metering module 10 of the present invention effectively solves the problem of how to increase the flow metering range and range ratio of ultrasonic water meters.

[0050] See Figure 2 and Figure 3 As shown, specifically, the fixed bracket 3 is fixedly installed inside the cavity 11, and the outer side of the fixed bracket 3 abuts against the inner wall of the cylindrical pipe 1. On the one hand, it is used to prevent fluid from flowing out from the gap between the fixed bracket 3 and the cylindrical pipe 1. On the other hand, the first outer channel groove 311 provided on the outer side of the fixed bracket 3 makes the first outer channel groove 311 and the inner wall of the cylindrical pipe 1 constitute the outer channel.

[0051] For further information, please refer to [link / reference]. Figure 6 As shown, in order to ensure a tight fit between the fixing bracket 3 and the cavity 11, the fixing bracket 3 is cylindrical in shape. Preferably, the fixing bracket 3 includes a first cylindrical portion 31 and a second cylindrical portion 32. The first cylindrical portion 31 is fitted onto the outer side of the second cylindrical portion 32. The outer side of the first cylindrical portion 31 abuts against the inner wall of the cylindrical pipe 1. The second cylindrical portion 32 is provided with a first inner channel 33. In addition, the outer side of the first cylindrical portion 31 abuts against the inner wall of the cylindrical pipe 1, and the outer side of the second cylindrical portion 32 and the first cylindrical portion 31 together form a first outer channel groove 311, so that the first outer channel groove 311 and the inner wall of the cylindrical pipe 1 constitute the components of the outer channel.

[0052] It should be noted that the first cylindrical part 31 is sleeved on the outer side of the second cylindrical part 32. The first cylindrical part 31 and the second cylindrical part 32 can be integrally formed, or the first cylindrical part 31 can be fixed to the outer side of the second cylindrical part 32 by means of bonding, snap-fitting, or welding.

[0053] In addition, along the axial direction from the inlet to the outlet of the cylindrical pipe 1, the radial dimension of the first inner channel 33 gradually decreases, thereby making the first inner channel 33 of the fixed support 3 a narrow-diameter structure, which in turn increases the flow rate of the fluid in the cavity 11.

[0054] See Figure 2 and Figure 3 As shown, specifically, the rotating bracket 2 is disposed inside the cavity 11 and is connected to the fixed bracket 3. The outer side of the rotating bracket 2 abuts against the inner wall of the cylindrical pipe 1. On the one hand, it is used to prevent fluid from flowing out from the gap between the rotating bracket 2 and the cylindrical pipe 1. On the other hand, it is used for the second outer channel groove 23 provided on the outer side of the rotating bracket 2, so that the second outer channel groove 23 and the inner wall of the cylindrical pipe 1 form the component of the outer channel. The rotating bracket 2 can rotate along the axial direction of the cylindrical pipe 1 to make the outer channel in a connected state or a disconnected state, thereby controlling the opening and closing state of the outer channel.

[0055] Continue reading Figure 5 As shown, the rotating bracket 2 is cylindrical in shape and is a third cylindrical part 21. A second inner channel 22 and a second outer channel groove 23 are provided in the third cylindrical part 21. Since the outer side of the third cylindrical part 21 abuts against the inner wall of the cylindrical pipe 1, the second outer channel groove 23 and the inner wall of the cylindrical pipe 1 constitute the outer channel.

[0056] For the best recommendations, please refer to the following: Figure 3 As shown, at least a portion of the second cylindrical portion 32 is inserted into the second inner channel 22 so as to ensure the sealing of the rotating bracket 2 and the fixed bracket 3 after they are connected by a nested fit.

[0057] Obviously, since the rotating support 2 can rotate along the axial direction of the cylindrical pipe 1, when the rotating support 2 rotates to a certain position, the first outer channel groove 311 and the second outer channel groove 23 are in a connected state. At this time, based on the inner channel being in a connected state, the outer channel is also in a connected state. Therefore, the flow cross-sectional area of ​​the cylindrical pipe 1 can be increased. When the flow velocity range remains unchanged, the flow rate passing through the cylindrical pipe 1 can be increased, and finally the flow measurement range and range ratio can be increased.

[0058] It should be noted that there is no limit to the number of the first outer channel groove 311 and the second outer channel groove 23. Any person skilled in the art can set them according to production needs. It should be ensured that the number of the first outer channel groove 311 and the second outer channel groove 23 is equal, preferably two.

[0059] See Figure 2 and Figure 3As shown, specifically, the reflector bracket 4 is fixedly installed inside the cavity 11 and the outer side of the reflector bracket 4 abuts against the inner wall of the cylindrical pipe 1. There are two reflector brackets 4, and the rotating bracket 2 and the fixed bracket 3 are clamped between the two reflector brackets 4. The reflector bracket 4 is used to install the transducer (not shown in the figure) on one hand, and to clamp and fix the rotating bracket 2 and the fixed bracket 3 on the other hand.

[0060] It should be noted that the reflector bracket 4 is also provided with a third inner channel 411 and a third outer channel groove 412, so that fluid can pass through the reflector bracket 4 and the reflector bracket 4 can avoid blocking the fluid; and the first inner channel 33 and the third inner channel 411 are always in a connected state; at the same time, along the axial direction of the cylindrical pipe 1, the first outer channel groove 311 and the two third outer channel grooves 412 are always on the same straight line. In other words, as long as the rotating bracket 2 rotates to the point that the first outer channel groove 311 and the second outer channel groove 23 are in a connected state, the first outer channel groove 311, the second outer channel groove 23 and the two third outer channel grooves 412 are also in a connected state. Therefore, by driving the rotating bracket 2, the opening and closing state of the outer channel can be changed. Thus, while keeping the flow velocity range constant, the flow cross-sectional area of ​​the cylindrical pipe 1 can be increased by keeping the outer channel in the open state, thereby increasing the flow rate passing through the cylindrical pipe 1, and ultimately increasing the flow measurement range and range ratio.

[0061] Continue reading Figure 7 As shown, in some embodiments of the present invention, the reflector support 4 includes a fourth cylindrical portion 41 and a support portion 42, which are connected together and can be integrally connected or detachably connected; the outer side of the fourth cylindrical portion 41 abuts against the inner wall of the cylindrical pipe 1 to prevent fluid from flowing out from the gap between the reflector support 4 and the cylindrical pipe 1.

[0062] Furthermore, one of the third cylindrical portions 41 abuts against the rotating bracket 2, and the other third cylindrical portion 41 abuts against the fixed bracket 3. The third cylindrical portion 41 is provided with a third inner channel 411 and a third outer channel groove 412. The bracket portion 42 is provided with a receiving space 422, and the receiving space 422 is connected to both the third inner channel 411 and the third outer channel groove 412 to allow fluid to flow out from the reflector bracket 4, preventing the reflector bracket 4 from blocking the fluid. Preferably, the bracket portion 42 includes multiple legs, which are respectively mounted on the third cylindrical portion 41, and the multiple legs constitute the receiving space 422.

[0063] In some embodiments of the present invention, the dual-channel flow metering module 10 further includes two transducers, which are installed on the same side cylindrical pipe 1. One transducer emits an ultrasonic signal, and the other transducer receives the reflected ultrasonic signal, thereby enabling the calculation of fluid flow.

[0064] See Figure 4 and Figure 7 As shown, the cylindrical pipe 1 has a transducer mounting hole 12, and a transducer mounting groove is provided on the inner wall of the transducer mounting hole 12. The transducer is locked in the transducer mounting groove. Simultaneously, the cylindrical pipe 1 has a positioning hole 13, through which a transducer fixing bracket is installed on the cylindrical pipe 1, and the transducer fixing bracket limits the transducer within the transducer mounting groove, preventing the transducer from shifting. The fixed position of the transducer facilitates the accurate projection of the ultrasonic waves emitted by the transducer onto the reflector, and also ensures that the ultrasonic waves reflected by the reflector are accurately collected by the transducer, thus increasing the accuracy of the fluid flow measurement results.

[0065] For further information, please refer to [link / reference]. Figure 7 As shown, a reflector is provided in the accommodating space 422, and the reflector is arranged opposite to the transducer. Since there is a gap in the accommodating space 422, the ultrasonic waves emitted by the transducer can pass through the gap in the accommodating space 422 and hit the reflector. The ultrasonic waves reflected by the reflector can return to the transducer through the gap in the accommodating space 422. More specifically, a reflector mounting groove 421 is provided on the support leg, and the reflector is installed in the reflector mounting groove 421 to ensure the installation stability of the reflector and the support leg.

[0066] It should be noted that since the reflector is set opposite to the transmitter / receiver of the transducer, when the transmitter of the transducer emits an ultrasonic wave, the direction after refraction by one of the reflectors coincides with or is parallel to the axial direction of the cylindrical pipe 1. After refraction by the other reflector, the ultrasonic wave enters the receiver of the other transducer.

[0067] Combination Figure 1 and Figure 7 As shown, in some embodiments of the present invention, a sealing ring groove 414 is provided on the outer side of the third cylindrical part 41, and a bracket sealing ring 7 is installed in the sealing ring groove 414. By embedding the bracket sealing ring 7 into the sealing ring groove 414, the sealing performance after the outer side of the third cylindrical part 41 abuts against the inner wall of the cylindrical pipe 1 is better, and fluid is further prevented from flowing out from the gap between the reflector bracket 4 and the cylindrical pipe 1.

[0068] Continue to combine Figure 1 , Figure 2 , Figure 4 as well as Figure 7 As shown, a bracket fixing groove 413 is further provided on the outer side of the third cylindrical part 41. Correspondingly, a threaded hole 16 is provided on the cylindrical pipe 1. The bracket fixing screw 6 passes through the threaded hole 16 and is embedded in the bracket fixing groove 413, thereby realizing a stable connection between the cylindrical pipe 1 and the reflector bracket 4, so that the reflector bracket 4 is limited in the cylindrical pipe 1, thereby enabling the ultrasonic waves emitted by the transducer to accurately hit the reflector, and enabling the ultrasonic waves reflected by the reflector to be accurately collected by the transducer. Furthermore, the positions of the rotating bracket 2 and the fixed bracket 3 located between the two reflector brackets 4 are not displaced by fluid impact, thus increasing the accuracy of the fluid flow measurement results.

[0069] Obviously, in order to ensure that the ultrasonic waves emitted by the transducer can smoothly enter the other transducer after being emitted by the two reflectors, the installation direction and position of the two reflector supports 4 on the cylindrical pipe 1 should be the same.

[0070] See Figure 1 As shown, specifically, the rotating bracket 2 is connected to the drive motor through the transmission structure 5. When the drive motor works, it drives the rotating bracket 2 to rotate through the transmission action of the transmission structure 5. This is so that when the rotating bracket 2 rotates to a certain position, the first outer channel groove 311 and the second outer channel groove 23 are in a connected state. Furthermore, the transmission structure 5 needs to pass through the cylindrical pipe 1 to be connected to the rotating bracket 2.

[0071] Combination Figure 1 , Figure 8 as well as Figure 9 As shown, in some embodiments of the present invention, the transmission structure 5 includes a transmission gear 51, the outer side of the rotating bracket 2 is provided with a motion groove 24, and the side wall of the motion groove 24 is provided with a toothed surface that cooperates with the transmission gear 51. By cooperating with the toothed surface in the motion groove 24, the transmission gear 51 can drive the rotating bracket 2 to rotate clockwise or counterclockwise in two opposite rotation directions in the motion groove 24. Thus, when the rotating bracket 2 rotates to a certain position, the first outer channel groove 311 and the second outer channel groove 23 are in a connected state.

[0072] Continue reading Figure 8 , Figure 10 as well as Figure 12As shown, the transmission structure 5 further includes a rotating shaft 52 and a cover plate 54. One end of the rotating shaft 52 is connected to the transmission gear 51, and the other end is embedded in the cover plate 54 and extends out of the cover plate 54 to connect with the transmission motor. The rotating shaft 52 includes a main drive rod 521, a driven rod 522, and a rotating part 523. The main drive rod 521 and the driven rod 522 are located at the two ends of the rotating part 523, respectively. A mating groove 511 is provided on the transmission gear 51, and an installation space and a mating hole 541 are provided in the cover plate 54. The driven rod 522 is located in the mating groove 511 to realize the connection and coaxial rotation between the rotating shaft 52 and the transmission gear 51. The rotating part 523 is embedded in the installation space and rotates in the installation space, which plays the role of transmitting torque and is used to realize the rotation of the transmission gear 51 in the motion groove 24. The main drive rod 521 is located in the mating hole 541 and can rotate in the mating hole 541. It extends out of the mating hole 541 and connects to the transmission motor.

[0073] Continue reading Figure 8 and Figure 11 As shown, a rotating shaft sealing ring 53 is further provided in the installation space, and the rotating shaft sealing ring 53 is sleeved on the outer side of the rotating part 523. The outer side of the rotating shaft sealing ring 53 abuts against the installation space, and the rotating shaft sealing ring 53 is in a compressed state. Since the rotating shaft sealing ring 53 has a good sealing effect, external air cannot enter the cavity 11 through the gap between the rotating part 523 and the installation space.

[0074] Combination Figure 10 and Figure 11 As shown, preferably, a multi-ring mating groove 5231 is provided on the outer side of the rotating part 523, and a mating retaining ring 531 with the same number of rings as the mating groove 5231 is provided on the inner wall of the rotating shaft sealing ring 53. The mating retaining ring 531 and the mating groove 5231 are mated together to further ensure the overall sealing performance of the module. In addition, in order to ensure that the rotating part 523 can rotate smoothly in the rotating shaft sealing ring 53 without interference, the multi-ring mating groove 5231 and the multi-ring mating retaining ring 531 should be arranged in the same direction and parallel to each other.

[0075] Combination Figure 4 and Figure 12As shown, since the transmission structure 5 needs to pass through the cylindrical pipe 1 to connect to the rotating bracket 2, a threaded groove 16 and a rotating shaft groove 15 are provided on the cylindrical pipe 1, and the threaded groove 16 and the rotating shaft groove 15 are coaxially arranged and connected. The threaded groove 16 is opened near the outer side of the cylindrical pipe 1, while the rotating shaft groove 15 is opened near the inner side of the cylindrical pipe 1. A tightening thread 542 is provided on the outer side of the cover plate 54 near the end of the cylindrical pipe 1. Therefore, by the cooperation of the tightening thread 542 and the threaded groove 16, the cover plate 54 is more firmly installed on the cylindrical pipe 1, and the threaded cooperation can also ensure the sealing of the cover plate 54 installed in the threaded groove 16, so that external air cannot enter the cavity 11 through the gap between the cover plate 54 and the threaded groove 16.

[0076] See Figure 8 As shown, the drive rod 522 is located in the rotating shaft groove 15 and rotates within the rotating shaft groove 15. In order to allow the drive rod 522 to rotate without resistance within the rotating shaft groove 15, a gap can be set between the drive rod 522 and the rotating shaft groove 15. Since the outer side of the cylindrical pipe 1 is already sealed by the rotating shaft sealing ring 53 and the threaded connection, the sealing performance is effectively guaranteed. The gap between the drive rod 522 and the rotating shaft groove 15 will not affect the overall sealing performance of the module.

[0077] See Figure 1 As shown, the cylindrical pipe 1 has mating threads 17 at both ends for connecting water pipes.

[0078] A second aspect of the present invention provides an ultrasonic water meter, comprising a dual-channel flow metering module 10 as described in any of the preceding claims, wherein the dual-channel flow metering module 10 is disposed within the ultrasonic water meter.

[0079] The ultrasonic water meter according to the present invention and the dual-channel flow metering module 10 of the present invention have the same advantages, which will not be repeated here.

[0080] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A dual-channel flow metering module, characterized by, The utility model relates to a double-channel flow metering module, comprising: a cylindrical pipe, a rotating support and a fixed support; a cavity is arranged in the cylindrical pipe, the fixed support is fixedly arranged in the cavity, the outer side surface of the fixed support is in abutment with the inner wall surface of the cylindrical pipe, and the rotating support is arranged in the cavity and in abutement with the inner wall surface of the cylindrical pipe; the fixed support is provided with a first inner channel, the rotating support is provided with a second inner channel, at least part of the fixed support is embedded in the second inner channel, and the first inner channel constitutes an inner channel; the fixed support is provided with a first outer channel groove, the rotating support is provided with a second outer channel groove, the rotating support can rotate along the axial direction of the cylindrical pipe to make the first outer channel groove and the second outer channel groove in a connected state or a disconnected state, and the first outer channel groove and the second outer channel groove jointly constitute an outer channel in the connected state; in the metering process of the double-channel flow metering module, when the flow is large, the outer channel is in an open state to increase the cross-sectional area of the cylindrical pipe and reduce the fluid flow rate, and when the flow is small, the outer channel is in a closed state to reduce the cross-sectional area of the cylindrical pipe and increase the fluid flow rate; the double-channel flow metering module further comprises a transmission structure penetrating the cylindrical pipe and connected with the rotating support; the transmission structure comprises a transmission gear, the outer side surface of the rotating support is provided with a movement groove, and the side wall of the movement groove is provided with a toothed surface matched with the transmission gear.

2. The dual channel flow metrology module of claim 1, wherein, the fixed support comprises a first cylindrical part and a second cylindrical part, the first cylindrical part is sleeved on the outer side surface of the second cylindrical part, the second cylindrical part is provided with the first inner channel, and the outer side surface of the second cylindrical part jointly constitutes the first outer channel groove with the first cylindrical part.

3. The dual channel flow metrology module of claim 2, wherein, the rotating support is a third cylindrical part, the third cylindrical part is provided with the second inner channel and the second outer channel groove, and at least part of the second cylindrical part is inserted into the second inner channel.

4. The dual channel flow metrology module of claim 3, wherein, the double-channel flow metering module further comprises a reflector support, the reflector support is fixedly arranged in the cavity and in abutment with the inner wall surface of the cylindrical pipe, the number of the reflector supports is two, and the rotating support and the fixed support are clamped between the two reflector supports.

5. The dual channel flow metrology module of claim 4, wherein, the reflector support is provided with a third inner channel and a third outer channel groove, the first inner channel and the third inner channel are always in a connected state; along the axial direction of the cylindrical pipe, the first outer channel groove and the two third outer channel grooves are always on the same straight line.

6. The dual channel flow metrology module of claim 5, wherein, the reflector support comprises a fourth cylindrical part and a support part, the fourth cylindrical part is connected with the support part, the fourth cylindrical part is provided with the third inner channel and the third outer channel groove, the support part is provided with an accommodation space, and the accommodation space is respectively connected with the third inner channel and the third outer channel groove.

7. The dual channel flow metrology module of claim 1, wherein, along the axial direction of the cylindrical pipe from the inlet to the outlet, the radial dimension of the first inner channel gradually decreases.

8. An ultrasonic water meter characterized by The dual channel flow metering module as claimed in any one of claims 1 to 7 is provided in the ultrasonic water meter.

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