Ultrasonic water meter

Abstract

The present invention provides an ultrasonic water meter, comprising a base and a mounting seat, wherein the base is a tubular structure that can be installed on a pipe section to be measured, and the mounting seat is a tubular structure that can be inserted into the inside of the base, and the base and the mounting seat can be circumferentially limited in a first position or a second position; the mounting seat has a circumferential angle between the first position and the second position, and the circumferential angle is between 45 and 135 degrees; the peripheral wall of the mounting seat is provided with at least one pair of corresponding transducers, and each pair of transducers can mutually transmit and receive ultrasonic sound beams to measure the liquid flow in the pipe section to be measured. With the above structure, the mounting seat can be switched between the first position and the second position, that is, the mounting seat as a whole can be rotated 45 to 135 degrees, so that the positions of each pair of transducers arranged in the mounting seat also change accordingly, and when the horizontal plane in the pipe section to be measured is higher than the horizontal plane of the central axis, the measurement path can be horizontally set to prevent scale or impurities from covering; when the horizontal plane in the pipe section to be measured is lower than the horizontal plane of the central axis, the measurement path can be vertically set for normal measurement.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline flow measurement, and in particular to an ultrasonic water meter. Background Art

[0002] Ultrasonic water meter is a new type of water meter that detects the time difference caused by the change in speed when the ultrasonic sound beam propagates downstream and upstream in water, analyzes and processes the water flow rate, and further calculates the water flow rate.

[0003] The ultrasonic water meter in the prior art is usually a pipe segment type, that is, the two transducers for sending and receiving ultrasonic sound beams are both arranged on the inner wall of the pipe segment to be measured to measure the flow of the corresponding pipe segment. Among them, the propagation path of the two transducers in the ultrasonic water meter for sending and receiving ultrasonic sound beams is the measurement path.

[0004] When the measurement path is in the vertical plane, that is, one of the two transducers is set at the bottom of the pipe body, and with the use of the ultrasonic water meter, or when sewage containing impurities flows in the pipe section to be measured, scale or deposited impurities will appear at the bottom of the pipe body, covering the top of the transducer at the bottom of the pipe body, resulting in reduced measurement accuracy of the ultrasonic water meter; when the measurement path is in the horizontal plane, neither of the two transducers is set at the bottom of the pipe body. Although it can avoid scale or impurity coverage, when the flow rate of the pipe section to be measured is low and the horizontal plane is below the horizontal plane of the center axis of the pipe body, the measurement path cannot pass through the water body, that is, the flow rate of the corresponding pipe section cannot be measured normally.

[0005] Therefore, how to provide an ultrasonic water meter that can avoid being covered by scale or impurities and can perform normal measurements when the flow rate is low is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0006] The object of the present invention is to provide an ultrasonic water meter which can avoid being covered by scale or impurities and can perform normal measurement when the flow rate is low.

[0007] In order to solve the above technical problems, the present invention provides an ultrasonic water meter for measuring the liquid flow in a pipe section to be measured, the ultrasonic water meter comprises a base and a mounting seat, the base is a tubular structure that can be installed on the pipe section to be measured, the mounting seat is a tubular structure that can be inserted into the inside of the base, the base and the mounting seat can be circumferentially limited in a first position or a second position; the mounting seat has a circumferential angle in the first position and the second position, and the circumferential angle is between 45 and 135 degrees; the peripheral wall of the mounting seat is provided with at least one pair of corresponding transducers, and each pair of the transducers can emit and receive ultrasonic sound beams to each other to measure the liquid flow in the pipe section to be measured.

[0008] With the above structure, the mounting base can be switched between the first position and the second position, that is, the mounting base as a whole can be rotated 45 to 135 degrees, so that the positions of each pair of transducers arranged in the mounting base also change accordingly. When the horizontal plane in the pipe section to be measured is higher than the horizontal plane of the central axis, the measuring path can be set horizontally to prevent scale or impurities from covering it; when the horizontal plane in the pipe section to be measured is lower than the horizontal plane of the central axis, the measuring path can be set vertically for normal measurement.

[0009] Optionally, the base and the mounting seat are fixed by a plurality of positioning blocks and corresponding positioning grooves, and the outer wall of the mounting seat and the inner wall of the base, one of which is protrudingly provided with a plurality of the positioning blocks, and the other is provided with a plurality of the positioning grooves; or, the outer wall of the base and the outer wall of the mounting seat are provided with a plurality of corresponding flanges, and the base and the mounting seat can be fixed by the corresponding flanges.

[0010] Optionally, the circumferential angle is 90 degrees.

[0011] Optionally, at least one pair of the transducers are symmetrically arranged along the center of the mounting base, the two are coaxially arranged, and the transmitting and receiving ends are opposite to each other; and / or, a reflector is also provided in the middle of the peripheral wall of the mounting base, and at least one pair of the transducers are radially opposite to the reflector, the transmitting and receiving ends of the pair of transducers are both facing the reflector, and the ultrasonic sound beam emitted by either one can be reflected by the reflector to the transmitting and receiving ends of the other one.

[0012] Optionally, each of the transducers is mounted on the peripheral wall of the mounting seat through a fixing member, and a mounting hole matching the transducer is provided in the middle of the fixing member, and the fixing member penetrates and is fixed to the peripheral wall of the mounting seat.

[0013] Optionally, a meter head is further included, which is fixed to the outer wall of the substrate and can be electrically connected to each of the transducers through a signal line to receive and display the liquid flow signal in the pipe section to be measured.

[0014] Optionally, the side edges at both axial ends of the mounting seat extend circumferentially outward to form extension portions, and a reserved space is formed between the two extension portions, the outer wall of the mounting seat and the inner wall of the base, and the signal line of each transducer can be arranged in the reserved space.

[0015] Optionally, a signal hole is provided through the connection position between the base and the meter head, and the signal line of each transducer can enter the meter head through the reserved space and the signal hole.

[0016] Optionally, the mounting seat includes a first half tube and a second half tube, and two side end surfaces of the first half tube and the second half tube can be fixed correspondingly to be assembled into the mounting seat.

[0017] Optionally, the outer wall of the base is further provided with a plurality of connecting parts, and the base can be fixed to the pipe section to be tested through each of the connecting parts; and / or, the bottom of the outer wall of the base is further provided with a plurality of supporting feet; and / or, the mounting seat is provided with a guide pipe at the water inlet end. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of an ultrasonic water meter provided by an embodiment of the present invention when a reflective transducer is installed;

[0019] Figure 2 It is a structural schematic diagram of an ultrasonic water meter provided by an embodiment of the present invention when a beam-type transducer is installed;

[0020] Figure 3 It is a schematic diagram of the structure of the ultrasonic water meter provided by the embodiment of the present invention when the mounting base is not installed;

[0021] Figure 4 yes Figure 1 A schematic diagram of the structure of a mounting base in which a reflective transducer is mounted;

[0022] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure of the dotted circle portion;

[0023] Figure 6 yes Figure 4 The schematic diagram of the structure of the first half pipe;

[0024] Figure 7 yes Figure 4 The structural diagram of the second half pipe;

[0025] Figure 8 yes Figure 2 A schematic diagram of the structure of a mounting base in which a through-beam transducer is mounted;

[0026] Fig. 9 is a schematic structural diagram of a fixing member in an embodiment of the present invention;

[0027] Fig.10 is a schematic structural diagram of a transducer in an embodiment of the present invention;

[0028] Fig.11 It is a schematic structural diagram of an ultrasonic water meter provided by an embodiment of the present invention when a flow guide tube is installed.

[0029] Figure 1-11 The reference numerals in the figures are described as follows:

[0030] 1 meter head, 2 base, 21 first positioning block, 22 signal hole, 23 connecting part, 24 support foot, 3 mounting seat, 31 first positioning groove, 32 second positioning groove, 33 first half pipe, 331 second positioning block, 34 second half pipe, 341 third positioning groove, 35 reflector, 36 extension part, 361 convex block, 37 guide tube, 4 transducer, 5 fixing part. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] The embodiment of the present invention provides an ultrasonic water meter for measuring the liquid flow in a pipe section to be measured. Figure 1-11 The ultrasonic water meter includes a base 2 and a mounting base 3, the base 2 is a tubular structure that can be installed in the pipe section to be measured, the mounting base 3 is a tubular structure that can be inserted into the inside of the base 2, the base 2 and the mounting base 3 can be circumferentially limited in a first position or a second position; the mounting base 3 has a circumferential angle in the first position and the second position, and the circumferential angle is between 45 and 135 degrees; at least one pair of corresponding transducers 4 is provided on the peripheral wall of the mounting base 3, and each pair of transducers 4 can emit and receive ultrasonic sound beams to each other to measure the liquid flow in the pipe section to be measured.

[0033] With the above structure, the mounting base 3 can be converted between the first position and the second position, that is, the mounting base 3 as a whole can be rotated 45 to 135 degrees relative to the base 2, so that the positions of each pair of transducers 4 arranged in the mounting base 3 also change accordingly. When the horizontal plane in the pipe section to be measured is higher than the horizontal plane of the central axis, the measuring path can be set horizontally to prevent scale or impurities from covering it; when the horizontal plane in the pipe section to be measured is lower than the horizontal plane of the central axis, the measuring path can be set vertically for normal measurement.

[0034] Among them, the central axis horizontal plane refers to the horizontal plane where the axis of the pipe section to be measured is located; when the liquid in the pipe section to be measured is not full pipe flow, that is, the pipe body of the pipe section to be measured is not filled with liquid, the horizontal plane in the pipe section to be measured is the average level of the liquid inside it. If the height of this average level is higher than the horizontal plane where the axis is located, it is regarded as higher than the central axis horizontal plane. If the height of this average level is lower than the horizontal plane where the axis is located, it is regarded as the first central axis horizontal plane; when the liquid in the pipe section to be measured is full pipe flow, that is, the pipe body of the pipe section to be measured is filled with liquid, it is regarded as a horizontal plane higher than the central axis horizontal plane.

[0035] The measurement path refers to the propagation path of the ultrasonic sound beams sent and received by each pair of transducers 4 in the ultrasonic water meter. When the measurement path is set horizontally, that is, the measurement path is at the same height as the horizontal plane of the central axis, if the liquid level in the pipe section to be measured is lower than the horizontal plane of the central axis at this time, the measurement path cannot pass through the liquid to normally measure the liquid flow; when the measurement path is set vertically, regardless of whether the liquid level is lower than the horizontal plane of the central axis, it can pass through part of the liquid to normally measure the liquid flow.

[0036] Specific as Figure 1-4 As shown, the base 2 and the mounting seat 3 are both tubular structures, and the mounting seat 3 as a whole can be inserted into the inside of the base 2, and the inner diameter of the base 2 corresponds to the outer diameter of the mounting seat 3. The first position and the second position described above refer to the relative positions between the base 2 and the mounting seat 3, that is, when the two are at two angles of the first position or the second position relative to each other, the two can be limitedly connected, and when the mounting seat 3 switches between the first position and the second position, the mounting seat 3 rotates relative to the base 2 at an angle equal to the circumferential angle.

[0037] The circumferential angle is between 45 and 135 degrees, and can be selected according to actual needs. In this embodiment, the circumferential angle is 90 degrees, that is, when the measurement path of a pair of transducers 4 in the mounting seat 3 is set in the vertical direction, after the mounting seat 3 is converted to another position, the measurement path of the pair of transducers 4 is rotated to be set in the horizontal direction, and vice versa.

[0038] When the liquid level in the pipe section to be measured is higher than the horizontal plane of the central axis, the horizontal setting accuracy of the measurement path of each pair of transducers 4 is higher; when the liquid level in the pipe section to be measured is lower than the horizontal plane of the central axis, the vertical setting accuracy of the measurement path of each pair of transducers 4 is higher. Therefore, when the circumferential angle in this embodiment is adopted, it is only necessary to set the initial measurement path of each pair of transducers 4 in the ultrasonic water meter to horizontal or vertical, and the measurement accuracy will be higher.

[0039] It can be understood that in addition to being circumferentially limited at the first position or the second position, the base 2 and the mounting base 3 can also be circumferentially limited at a greater number of positions depending on the different fixing methods and structures of the two, so that each pair of transducers 4 in the mounting base 3 has more position options to further adapt to different working conditions and improve the measurement accuracy of the ultrasonic water meter.

[0040] In this embodiment, the base 2 and the mounting seat 3 are fixed by a number of positioning blocks and corresponding positioning grooves. The outer wall of the mounting seat 3 and the inner wall of the base 2 are provided with a number of positioning blocks on one side and a number of positioning grooves on the other side; alternatively, the outer wall of the base 2 and the outer wall of the mounting seat 3 are provided with a number of corresponding flanges, and the base 2 and the mounting seat 3 can be fixed by the corresponding flanges.

[0041] Specifically, in the method of using the positioning block and the positioning groove to limit the fixation, such as Figure 4 and Figure 8 As shown, in this embodiment, two positioning grooves, namely, a first positioning groove 31 and a second positioning groove 32, are respectively provided at the end of the outer wall of the mounting seat 3, and a positioning block, namely, a first positioning block 21, is provided at the end of the outer wall of the base 2. When the first positioning block 21 is plugged into the first positioning groove 31, the base 2 and the mounting seat 3 are in the first position, and when the first positioning block 21 is plugged into the second positioning groove 32, the base 2 and the mounting seat 3 are in the second position, and the switching between the first position and the second position is realized through different plug-in limit positions.

[0042] Alternatively, in the flange limit fixation method, flange plates can be correspondingly arranged on the outer walls of the mounting seat 3 and the base 2, and four flange holes are arranged in the circumferential direction of the two flange plates. The base 2 and the mounting seat 3 are fixed in position by fasteners passing through the four flange holes, and when the mounting seat 3 is rotated to different angles, the corresponding flange holes of the two also change accordingly, so that switching between four positions can be achieved.

[0043] It is understandable that the base 2 and the mounting seat 3 can also adopt other limiting and fixing methods besides those described above to achieve switching of different numbers and different angle positions. The present invention is not limited to this, as long as the two can achieve the above-mentioned effects.

[0044] In addition, in this embodiment, only one pair of transducers 4 can be set on the inner wall of the mounting seat 3, and the flow measured by the pair of transducers 4 is the output value; the mounting seat 3 can also be provided with multiple pairs of transducers 4, and the average value of the flow measured by each pair of transducers 4 is the output value, which has higher accuracy than the output value of only one pair of transducers 4.

[0045] In this embodiment, at least one pair of transducers 4 are symmetrically arranged along the center of the mounting base 3, and the two are arranged coaxially, and the transmitting and receiving ends are arranged oppositely. Fig.10 As shown, Fig.10 The linear structure on the left side is the signal line, and the transducer 4 can output flow signals, etc. through the signal line; Fig.10 The cylindrical protrusion on the middle right is the transmitting and receiving end of the transducer 4. The transducer 4 can transmit and receive ultrasonic sound beams from the transmitting and receiving ends to measure the liquid flow in the pipe section to be measured.

[0046] Please refer to Figure 8 The symmetrical arrangement of a pair of transducers 4 means that the two transducers 4 are respectively arranged on two radially opposite sides of the inner wall of the mounting seat 3, the connecting line of the two transducers passes through the axis of the mounting seat 3, the two transducers are respectively close to the two axial ends of the mounting seat 3, and the distances between the two transducers and the corresponding ends are the same; the transmitting and receiving ends of a pair of transducers 4 are relatively arranged, which means that the two transducers are both facing the center of the mounting seat 3, and can transmit and receive ultrasonic sound beams to each other. For the convenience of description, this arrangement is defined as the opposite-beam type.

[0047] Alternatively, in the present embodiment, a reflector 35 is further provided in the middle of the peripheral wall of the mounting seat 3, and at least one pair of transducers 4 is radially arranged opposite to the reflector 35, the transmitting and receiving ends of the pair of transducers 4 are both facing the reflector 35, and the ultrasonic sound beam emitted by either one can be reflected by the reflector 35 to the transmitting and receiving ends of the other one.

[0048] Please refer to Figure 4 , 6 In this arrangement, the reflector 35 is arranged on one side of the peripheral wall of the mounting seat 3, and a pair of transducers 4 are arranged on the other side radially opposite to the reflector 35 ( Figure 7 Two fixing members 5 for mounting the transducers 4 are shown, and the transmitting and receiving ends of the two transducers 4 are both facing the reflective sheet 35, and the ultrasonic sound beams emitted by both can be received by the other after being reflected by the reflective sheet 35. For the convenience of description, this setting mode is defined as a reflective type.

[0049] Based on the two transducer 4 settings mentioned above, namely, the reflected type and the radiated type, in actual application, according to the different water qualities in the pipe section to be measured, the different required measurement accuracies and the different structures of the mounting base 3, any one of the two methods can be selected for measurement. If the installation space is sufficient, the two methods can also be selected to be set together to further improve the measurement accuracy of the ultrasonic water meter.

[0050] In this embodiment, each transducer 4 is mounted on the peripheral wall of the mounting seat 3 through a fixing member 5. The fixing member 5 has a mounting hole in the middle thereof to match the transducer 4 and penetrates and is fixed to the peripheral wall of the mounting seat 3. Fig. 9 As shown, the fixing member 5 is an annular structure, which can pass through and be fixed to the peripheral wall of the mounting seat 3. The fixing method can be snap-fit ​​or interference fit, etc. It should be noted that since the transducer 4 can be fixedly installed in the inner hole of the fixing member 5, that is, the transducer 4 and the inner hole of the fixing member 5 are coaxially arranged, the setting position of the fixing member 5 should be determined according to the installation position of the transducer 4, and the setting angle of the axis of the inner hole of the fixing member 5 should also be determined according to the setting angles of the transmitting and receiving ends of the transducer 4.

[0051] This embodiment also includes a meter head 1, which is fixed to the outer wall of the base 2 and can be electrically connected to each transducer 4 through a signal line to receive and display the liquid flow in the pipe section to be measured.

[0052] Specifically, in this embodiment, the side edges at both axial ends of the mounting seat 3 extend circumferentially outward to form an extension portion 36, and the first positioning groove 31 and the second positioning groove 32 are both arranged in one of the extension portions 36. A reserved space is formed between the two extension portions 36, the outer wall of the mounting seat 3 and the inner wall of the base 2, and the signal line of each transducer 4 can be arranged in the reserved space.

[0053] The first positioning groove 31 and the second positioning groove 32 are groove structures arranged on the same extension portion 36 , and their shapes correspond to the first positioning block 21 , so that the first positioning block 21 can be inserted into the first positioning groove 31 or the second positioning groove 32 without any gap, thereby limiting the mounting seat 3 .

[0054] After each transducer 4 is fixed to the mounting base 3 by the fixing member 5, the connecting wire connected to the rear end thereof extends from the outer side of the inner hole of the fixing member 5 to the reserved space. In this embodiment, a signal hole 22 is also provided at the connection position between the base 2 and the meter head 1. Figure 3 As shown, the connecting wires of each transducer 4 can enter the meter head 1 through the reserved space and the signal hole 22, and transmit the measured flow signal of the liquid in the pipe section to be measured to the meter head 1. After receiving the flow signal, the meter head 1 can display it for the staff to view.

[0055] In this embodiment, a plurality of protrusions 361 are protruded from the outer edge of the extension portion 36 where the first positioning groove 31 and the second positioning groove 32 are not provided. The mounting seat 3 can be fixed to the base body 2 by interference fit through the protrusions 361 .

[0056] like Figure 4 and Figure 5 As shown, Figure 5 That is Figure 4 The enlarged schematic diagram of the dotted circle part shows that in this embodiment, protrusions 361 are provided on the outer sides of the extension part 36 in four directions. When the mounting seat 3 is inserted into the inner hole of the base 2, the extension part 36 with the protrusions 361 will produce an interference fit with the inner hole wall of the base 2, so that the mounting seat 3 is fixed more firmly.

[0057] Since the material of the mounting base 3 and the base 2 is usually polycarbonate or polyamide, etc., this material has a certain expansion and contraction rate, and after manufacturing is completed, there is usually a slight difference from the design size. The above-mentioned fixing method can effectively reduce the impact of this slight difference on the installation of the mounting base 3 and the base 2, so that the two can be installed normally.

[0058] In this embodiment, the mounting seat 3 includes a first half pipe 33 and a second half pipe 34 . The two side end surfaces of the first half pipe 33 and the second half pipe 34 can be fixed correspondingly to form the mounting seat 3 .

[0059] like Figure 6 , 7 As shown, the two side end faces of the first half tube 33 are respectively provided with three second positioning blocks 331, and the two side end faces of the second half tube 34 are respectively provided with three third positioning grooves 341 at the corresponding positions. The first half tube 33 and the second half tube 34 can be plugged and fixed through the matching second positioning blocks 331 and third positioning grooves 341. This arrangement can make the mounting seat 3 easier to demold during manufacturing.

[0060] In the reflected ultrasonic water meter, one of each pair of transducers 4 is arranged in the first half pipe 33, and the other is arranged in the second half pipe 34; in the reflected ultrasonic water meter, the reflector 35 is arranged in the first half pipe 33, and each pair of transducers 4 is arranged in the second half pipe 34 to ensure the normal use of the ultrasonic water meter.

[0061] The first half pipe 33 and the second half pipe 34 described above are only for the convenience of describing the two parts of the mounting base 3. There is no other substantial difference between the two except for the components arranged thereon. The second positioning blocks 331 and the third positioning grooves 341 are not limited to being respectively arranged in the first half pipe 33 and the second half pipe 34. This description cannot be regarded as a structural limitation on the two parts of the mounting base 3, and the mounting base 3 can also be composed of other numbers of parts. The first half pipe 33 and the second half pipe 34 can also be spliced ​​by other methods besides positioning blocks and positioning grooves. The present invention does not limit this.

[0062] In this embodiment, the outer wall of the base 2 is also provided with a plurality of connecting parts 23, and the base 2 can be fixed to the pipe section to be tested through each connecting part 23. Figure 1 and Figure 2 The connecting portion 23 is a fixing hole arranged on the outer wall of the base 2, which can be fixed to the pipe section to be tested by fasteners such as bolts passing through the fixing hole; in this embodiment, a plurality of supporting legs 24 are also provided at the bottom of the outer wall of the base 2. If there is a supporting surface that can be placed under the base 2, the base 2 can be supported on the supporting surface by the plurality of supporting legs 24, so that it can be placed on the supporting surface more stably.

[0063] In this embodiment, the mounting base 3 is provided with a flow guide pipe 37 at the water inlet end. Fig.11 The water inlet end of the mounting base 3 is the end where the liquid flows in. The flow guide tube 37 can reduce the turbulence when the liquid flows into the mounting base 3, reduce the bubbles in the liquid, etc., and can make the transmission of the ultrasonic sound beam emitted by the transducer 4 more stable, so as to improve the measurement accuracy of the ultrasonic water meter.

[0064] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An ultrasonic water meter for measuring the liquid flow in a pipe section to be measured, characterized in that: The ultrasonic water meter comprises a base (2) and a mounting seat (3), the base (2) being a tubular structure capable of being mounted on the pipe section to be measured, the mounting seat (3) being a tubular structure capable of being inserted into the inside of the base (2), the base (2) and the mounting seat (3) being capable of being circumferentially limited at a first position or a second position, and the mounting seat (3) being capable of switching between the first position and the second position; the mounting seat (3) having a circumferential angle between the first position and the second position, the circumferential angle being between 45 and 135 degrees; At least one pair of corresponding transducers (4) is provided on the peripheral wall of the mounting seat (3), and each pair of the transducers (4) can mutually transmit and receive ultrasonic sound beams to measure the liquid flow rate in the pipe section to be measured; the mounting seat (3) as a whole can be rotated 45 to 135 degrees relative to the base (2), so that the positions of each pair of the transducers (4) change accordingly; when the horizontal plane in the pipe section to be measured is higher than the horizontal plane of the central axis, the measurement path can be set horizontally; when the horizontal plane in the pipe section to be measured is lower than the horizontal plane of the central axis, the measurement path can be set vertically; The central axis horizontal plane refers to the horizontal plane where the axis of the pipe section to be measured is located, and the measurement path refers to the propagation path of each pair of transducers sending and receiving ultrasonic sound beams.

2. The ultrasonic water meter according to claim 1, characterized in that: The base (2) and the mounting seat (3) are fixed in position by means of a plurality of positioning blocks and corresponding positioning grooves; the outer wall of the mounting seat (3) and the inner wall of the base (2) are provided with a plurality of the positioning blocks protruding from one side and a plurality of the positioning grooves on the other side; Alternatively, the outer wall of the base (2) and the outer wall of the mounting seat (3) are provided with a plurality of corresponding flanges, and the base (2) and the mounting seat (3) can be fixed in position by means of the corresponding flanges.

3. The ultrasonic water meter according to claim 1, characterized in that: The circumferential angle is 90 degrees.

4. The ultrasonic water meter according to any one of claims 1 to 3, characterized in that: At least one pair of the transducers (4) are symmetrically arranged along the center of the mounting seat (3), the two transducers are arranged coaxially, and the transmitting and receiving ends are arranged opposite to each other; And / or, a reflector (35) is further provided in the middle of the peripheral wall of the mounting seat (3), and at least one pair of the transducers (4) is arranged radially opposite to the reflector (35), the transmitting and receiving ends of the pair of transducers (4) are both facing the reflector (35), and the ultrasonic sound beam emitted by either one can be reflected by the reflector (35) to the transmitting and receiving ends of the other one.

5. The ultrasonic water meter according to any one of claims 1 to 3, characterized in that: Each of the transducers (4) is mounted on the peripheral wall of the mounting seat (3) via a fixing member (5); a mounting hole matching the transducer (4) is provided in the middle of the fixing member (5), and the fixing member (5) penetrates and is fixed to the peripheral wall of the mounting seat (3).

6. The ultrasonic water meter according to any one of claims 1 to 3, characterized in that: It also comprises a meter head (1), which is fixed to the outer wall of the base body (2) and can be electrically connected to each of the transducers (4) via a signal line to receive and display the liquid flow signal in the pipe section to be measured.

7. The ultrasonic water meter according to claim 6, characterized in that: The side edges at both axial ends of the mounting seat (3) extend outward in the circumferential direction to form extension portions (36), and a reserved space is formed between the two extension portions (36), the outer wall of the mounting seat (3) and the inner wall of the base (2), and the signal line of each transducer (4) can be arranged in the reserved space.

8. The ultrasonic water meter according to claim 7, characterized in that: A signal hole (22) is provided through the connection position between the base body (2) and the meter head (1), and the signal line of each transducer (4) can enter the meter head (1) through the reserved space and the signal hole (22).

9. The ultrasonic water meter according to any one of claims 1 to 3, characterized in that: The mounting seat (3) comprises a first half tube (33) and a second half tube (34), and two side end surfaces of the first half tube (33) and the second half tube (34) can be fixed correspondingly to form the mounting seat (3).

10. The ultrasonic water meter according to any one of claims 1 to 3, characterized in that: The outer wall of the base body (2) is further provided with a plurality of connecting parts (23), and the base body (2) can be fixed to the pipe section to be tested via each of the connecting parts (23); And / or, a plurality of supporting feet (24) are further provided at the bottom of the outer wall of the base body (2); And / or, the mounting seat (3) is provided with a flow guide pipe (37) at the water inlet end.

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