An ultrasonic water meter

Abstract

The present invention belongs to the technical field of water metering, especially an ultrasonic water metering. Aiming at the problem that ultrasonic water meters are difficult to install and cannot be popularized, the following scheme is proposed, including a lower guard plate, the upper surface of the lower guard plate is rotatably connected to an upper guard plate by a hinge near one end, the arc-shaped outer wall of the upper guard plate is fixed with a meter head by bolts near the middle of the top, the arc-shaped outer wall of the upper guard plate is screwed with a threaded wire tube at one side near the meter head, and the bottom end of the threaded wire tube is rotatably connected with transducer 1. The present invention provides externally clamped transducers 1 and 2, so that there is no need to cut or destroy the pipeline when installing the water meter, thus avoiding damage to the pipeline system and the complexity of subsequent maintenance. The installation process is relatively simple, usually does not require complex tools or professional skills, and is convenient for users to install and maintain in the later stage.

Description

Technical Field

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

[0002] Water meters are important instruments for measuring water flow and water consumption. They are widely used in many fields such as households, commerce and industry. With the acceleration of urbanization and the shortage of water resources, the application of water meters is particularly important. Ultrasonic water meters contain sensors that transmit and receive ultrasonic waves. These sensors send ultrasonic signals and measure the time it takes for the signals to propagate in water. When water flows, the propagation time of ultrasonic signals is affected by the water flow rate. Usually, signals sent downstream and upstream have different propagation times. By comparing these two time differences, the water flow rate can be calculated.

[0003] Commonly used ultrasonic water meters require the use of professional equipment to cut off the water pipe and then install the meter. This process is cumbersome and not suitable for ordinary operators. It is difficult to install and cannot be applied to ordinary people, resulting in low acceptance of such ultrasonic water meters by the public and failure to generate certain economic benefits. Therefore, an ultrasonic metering water meter is proposed. Summary of the invention

[0004] The present invention provides an ultrasonic metering water meter to solve the problem that the commonly used ultrasonic water meter has a large installation difficulty coefficient and cannot be popularized.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an ultrasonic metering water meter, comprising a lower guard plate, the upper surface of the lower guard plate is rotatably connected to an upper guard plate by a hinge near one end, and the arc-shaped outer wall of the upper guard plate is fixed with a meter head by bolts near the middle of the top, the arc-shaped outer wall of the upper guard plate is screwed with a threaded wire tube on one side near the meter head, and the bottom end of the threaded wire tube is rotatably connected to transducer 1, the middle of the top of transducer 1 is connected to data cable 2, and the end of data cable 2 away from transducer 1 passes through the threaded wire tube and is connected to the meter head.

[0006] A further configuration of the present invention is that a wire tube 1 is inserted into the side of the arc-shaped outer wall of the upper guard plate away from the threaded wire tube, and a data cable 1 is connected to the side of the meter head away from the data cable 2, the data cable 1 passes through the wire tube 1, and a distance adjusting mechanism is installed at the end of the data cable 1 away from the meter head, the distance adjusting mechanism includes transducer 2, and a snap mechanism is installed at the end of the upper guard plate away from the hinge.

[0007] A further configuration of the present invention is that the distance adjustment mechanism includes a displacement hole, a displacement hole is opened at the bottom of the arc-shaped outer wall of the lower guard plate away from the transducer, and limiting holes are evenly opened on the side of the arc-shaped outer wall of the lower guard plate close to the displacement hole, and a threaded limiting tube is screwed on the circumferential inner wall of the limiting hole, and the threaded limiting tube passes through the lower guard plate.

[0008] A further configuration of the present invention is that a positioning rod is inserted into the circumferential inner wall of the threaded limit tube, and a tray is screwed on the top of the positioning rod, a wire tube 2 is welded to the middle of the top of the tray, and a transducer 2 is fixed to the top of the wire tube 2, a wire hole is opened on the circumferential outer wall of the wire tube 2 near the bottom end, and the end of the data cable 1 away from the meter head passes through the wire hole and is connected to the transducer 2.

[0009] A further configuration of the present invention is that the snap mechanism includes a protrusion, the upper surface of the lower guard plate is evenly welded with protrusions at one end away from the hinge, and a plurality of protrusions are provided with snap holes on one side, the lower surface of the upper guard plate is evenly provided with grooves at one end close to the protrusions, and the grooves are adapted to the protrusions, the inner wall of the groove on one side close to the snap hole is fixed with a latch mechanism, and the latch mechanism includes a snap block, and the snap block is adapted to the snap hole.

[0010] A further configuration of the present invention is that the latch mechanism includes a receiving groove, a receiving groove is opened on the side of the groove close to the card hole, and a movable column is inserted into the inner wall of one side of the receiving groove, a card block is fixed on the side of the movable column close to the groove, and the receiving groove and the card block are adapted to each other, a supporting groove is opened on the side of the upper guard plate close to the movable column and away from the card block, a baffle is fixed on the inner wall of the support groove close to the movable column, and a supporting spring is welded on the side of the baffle close to the movable column, a loading plate is fixed on the side of the support spring close to the movable column, and the loading plate and the movable column are connected, a movable mechanism is installed on the arc-shaped outer wall of the upper guard plate close to the top of the groove, and the movable mechanism includes a second fixing ring.

[0011] A further configuration of the present invention is that the movable mechanism includes a slide groove, a slide groove is opened on the arc-shaped outer wall of the upper guard plate near the top of the groove, and the slide groove is slidably connected to a slider, a sealing plate is fixed to the open end of the slide groove of the upper guard plate by bolts, and a process hole is opened on one end of the principle slider of the sealing plate, a shift rod is inserted in the middle of one side of the slider near the process hole, and the shift rod passes through the process hole.

[0012] A further configuration of the present invention is that a same movable rod is screwed on the middle part of both sides of the slider one, and a fixing ring one is evenly sleeved on the circumferential outer wall of the movable rod, an insertion rod one is inserted into the circumferential outer wall of the fixing ring one, and the insertion rod one passes through the movable rod, a connecting rod is welded to the bottom end of the fixing ring one, and a fixing ring two is welded to the bottom end of the connecting rod, the circumferential inner walls of several fixing rings two are connected to the movable column, and the circumferential outer walls of several fixing rings two are inserted into the insertion rod two, and the insertion rod two passes through the movable column.

[0013] A further configuration of the present invention is that the arc-shaped outer walls of the lower guard plate and the upper guard plate are evenly provided with mounting holes, and a plurality of mounting holes are plugged with sliding rods, a loading plate is fixed to the bottom end of the sliding rod, and a connecting block two is welded near both ends of the loading plate on the side away from the sliding rod, the adjacent end of the connecting block two is plugged with the same movable shaft three, and a pair of connecting plates are rotatably connected to the circumferential outer wall of the movable shaft three near the middle.

[0014] A further arrangement of the present invention is that the circumferential inner walls of the lower guard plate and the upper guard plate are evenly provided with slide grooves 2 near both sides, and the inner walls of several slide grooves 2 are slidably connected with a pair of pulleys, and the adjacent ends of each pair of pulleys are plugged with a wheel axle, the circumferential inner wall of the wheel axle is rotatably connected with a connecting block 1 near the middle, and the end of the connecting block 1 away from the pulley is plugged with a movable shaft 1, the movable shaft 1 is connected to one side of the connecting plate, and the side of each pair of connecting plates away from the corresponding movable shaft 1 is plugged with a movable shaft 2, and the circumferential outer wall of the movable shaft 2 is rotatably connected with a slider 2 near the middle, the same pair of sliders 2 are slidably connected with a slide rail at one end away from the connecting plate, and the ends of the two slide rails away from the slider 2 are fixed to the same fixed plate by bolts, and the circumferential outer walls of the threaded wire tube and the wire tube 2 are sleeved and fixed with an arc-shaped push plate at one end near the fixed plate.

[0015] In summary, the beneficial effects of this solution are:

[0016] 1. By setting a threaded limit tube, the distance from transducer 2 to transducer 1 can be changed, so that the ultrasonic water meter can be used in pipes of different diameters without replacing the equipment, thereby improving the versatility of the equipment. By adjusting the position of transducer 2, the way of sound wave propagation can be optimized and the influence of turbulence on the measurement results can be reduced.

[0017] 2. By setting up external clamp-on transducer 1 and transducer 2, there is no need to cut or damage the pipe when installing the water meter, thus avoiding damage to the pipe system and the complexity of subsequent maintenance. The installation process is relatively simple and usually does not require complex tools or professional skills, making it easy for users to install and maintain it later.

[0018] 3. By setting a fixed plate, the axis of the water pipe can be made to coincide with the axis of the lower guard plate and the upper guard plate, ensuring that the distances from transducer 1 and transducer 2 to the axis of the lower guard plate and the upper guard plate are the same, thereby improving the accuracy of the measurement data and further reducing the impact of the external environment on the measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the front-end structure of an ultrasonic water meter proposed by the present invention;

[0020] Figure 2 A schematic diagram of the back-end structure of an ultrasonic water meter proposed by the present invention;

[0021] Figure 3 A schematic diagram of the internal structure of an ultrasonic water meter proposed by the present invention;

[0022] Figure 4 A schematic diagram of the structure of a distance adjustment mechanism of an ultrasonic water meter proposed by the present invention;

[0023] Figure 5 This is a schematic diagram of the buckle mechanism structure of an ultrasonic water meter proposed by the present invention;

[0024] Figure 6 A schematic diagram of the structure of the active mechanism of an ultrasonic water meter proposed by the present invention;

[0025] Figure 7 A schematic diagram of the latch mechanism structure of an ultrasonic water meter proposed by the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of a fixing plate of an ultrasonic water meter proposed by the present invention.

[0027] In the figure: 1, lower guard plate; 101, displacement hole; 102, bump; 1021, clamping hole; 2, upper guard plate; 201, groove; 202, slide groove 1; 203, storage groove; 204, support groove; 3, wire tube 1; 4, data line 1; 5, meter head; 6, data line 2; 7, threaded wire tube; 8, fixing plate; 9, sealing plate; 901, process hole 1; 10, slide rod; 11, threaded limit tube; 12, transducer 1; 13, transducer 2; 14, limit hole; 15, positioning rod; 16, tray; 17, wire tube 2; 170 1. Wire hole; 18. Push rod; 19. Block; 20. Movable rod; 21. Fixed ring 1; 22. Slider 1; 23. Insert rod 1; 24. Support spring; 25. Connecting rod; 26. Movable column; 27. Fixed ring 2; 28. Insert rod 2; 29. ​​Loading sheet; 30. Baffle; 31. Loading plate; 32. Pulley; 33. Slide groove 2; 34. Connecting block 1; 35. Movable shaft 1; 36. Connecting plate; 37. Slider 2; 38. Movable shaft 2; 39. Slide rail; 40. Connecting block 2; 41. Movable shaft 3; 42. Arc push plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] In this embodiment, refer to Figure 1-8 An ultrasonic water meter comprises a lower guard plate 1, an upper guard plate 2 is rotatably connected to an upper guard plate 2 near one end of the upper surface of the lower guard plate 1 through a hinge, and a meter head 5 is fixed to the arc-shaped outer wall of the upper guard plate 2 near the middle of the top through a bolt, a threaded wire tube 7 is screwed on one side of the arc-shaped outer wall of the upper guard plate 2 near the meter head 5, and a transducer 12 is rotatably connected to the bottom end of the threaded wire tube 7, a data line 2 6 is connected to the middle of the top of the transducer 12, and an end of the data line 2 6 away from the transducer 12 passes through the threaded wire tube 7 and The meter head 5 is connected, a wire tube 3 is inserted into the side of the arc-shaped outer wall of the upper guard plate 2 away from the threaded wire tube 7, and a data line 4 is connected to the side of the meter head 5 away from the data line 2 6. The data line 4 passes through the wire tube 3, and a distance adjustment mechanism is installed at the end of the data line 4 away from the meter head 5. The distance adjustment mechanism includes a transducer 2 13, and a snap mechanism is installed at the end of the upper guard plate 2 away from the hinge; the threaded wire tube 7 is rotated to change the position of the transducer 12 so that it can be close to the water pipe to be tested, thereby improving the stability during measurement and reducing errors.

[0030] refer to Figure 3 , Figure 4The distance adjustment mechanism includes a displacement hole 101, a displacement hole 101 is opened at the bottom of the arc-shaped outer wall of the lower guard plate 1 on the side away from the transducer 12, and a limiting hole 14 is evenly opened on the arc-shaped outer wall of the lower guard plate 1 close to the displacement hole 101. The circumferential inner wall of the limiting hole 14 is screwed with a threaded limiting tube 11, and the threaded limiting tube 11 passes through the lower guard plate 1, and the circumferential inner wall of the threaded limiting tube 11 is inserted with a positioning rod 15, and the top of the positioning rod 15 is screwed with a tray 16, and a wire tube 17 is welded in the middle of the top of the tray 16, and the top of the wire tube 17 is fixed with Transducer 2 13, a wire hole 1701 is opened on the circumferential outer wall of the wire tube 2 17 near the bottom end, and the end of the data line 14 away from the meter head 5 passes through the wire hole 1701 and is connected to transducer 2 13; by changing the position of the threaded limit tube 11, the distance from transducer 2 13 to transducer 1 12 can be changed, so that the ultrasonic metering water meter can be used in pipes of different diameters without replacing the equipment, thereby improving the versatility of the equipment, and by adjusting the position of the transducer 2 13, the way of sound wave propagation can be optimized and the influence of turbulence on the measurement results can be reduced.

[0031] refer to Figure 6 The buckle mechanism includes a protrusion 102, and the protrusion 102 is evenly welded on the end of the upper surface of the lower guard plate 1 away from the hinge, and a plurality of protrusions 102 are provided with a locking hole 1021 on one side, and a groove 201 is evenly provided on the end of the lower surface of the upper guard plate 2 close to the protrusion 102, and the groove 201 is adapted to the protrusion 102, and a latch mechanism is fixed on the inner wall of the groove 201 close to the locking hole 1021, and the latch mechanism includes a locking block 19, and the locking block 19 is adapted to the locking hole 1021; when the lower guard plate 1 and the upper guard plate 2 are closed, the locking block 19 is embedded in the locking hole 1021 to complete the fixation and prevent the lower guard plate 1 and the upper guard plate 2 from separating.

[0032] refer to Figure 7 The latch mechanism includes a receiving groove 203, a receiving groove 203 is formed on the side of the groove 201 close to the card hole 1021, and a movable column 26 is inserted into the inner wall of one side of the receiving groove 203, a clamping block 19 is fixed on the side of the movable column 26 close to the groove 201, and the receiving groove 203 and the clamping block 19 are adapted to each other, a supporting groove 204 is formed on the side of the upper guard plate 2 close to the movable column 26 away from the clamping block 19, and a supporting groove 204 is fixed on the inner wall of the side of the supporting groove 204 away from the movable column 26 The baffle 30 is welded with a support spring 24 on one side of the baffle 30 close to the movable column 26, a loading plate 29 is fixed on one side of the support spring 24 close to the movable column 26, and the loading plate 29 is connected to the movable column 26, a movable mechanism is installed on the arc-shaped outer wall of the upper guard plate 2 close to the top of the groove 201, and the movable mechanism includes a fixing ring 27; when the lower guard plate 1 and the upper guard plate 2 are close to each other, the protrusion 102 squeezes the block 19, so that the block 19 is received in the storage groove 203.

[0033] refer to Figure 6The movable mechanism includes a slide groove 202, a slide groove 202 is opened at the top of the groove 201 of the arc-shaped outer wall of the upper guard plate 2, and the slide groove 202 is slidably connected to a slider 22, the open end of the slide groove 202 of the upper guard plate 2 is fixed with a sealing plate 9 by bolts, and the sealing plate 9 is provided with a process hole 901 at one end of the slider 22, a lever 18 is inserted in the middle of one side of the slider 22 near the process hole 901, and the lever 18 passes through the process hole 901, the middle of both sides of the slider 22 are screwed with the same movable rod 20, and the circumferential outer wall of the movable rod 20 is evenly sleeved with a fixing ring 21, and the circumference of the fixing ring 21 An insert rod 23 is inserted into the outer wall of the circumference, and the insert rod 23 passes through the movable rod 20. A connecting rod 25 is welded to the bottom end of the fixed ring 21, and a fixed ring 27 is welded to the bottom end of the connecting rod 25. The circumferential inner walls of several fixed rings 27 are connected to the movable column 26, and the circumferential outer walls of several fixed rings 27 are inserted with insert rods 28, and the insert rods 28 pass through the movable column 26. The lever 18 is pushed along the process hole 901 to control the movable rod 20 to slide left and right, driving the movable column 26 to slide left and right, making it easier to move the lower guard plate 1 and the upper guard plate 2, and reducing the possibility of causing the lower guard plate 1 and the upper guard plate 2 to be damaged by misoperation, thereby improving the safety of the water meter.

[0034] refer to Figure 8 The arc-shaped outer walls of the lower guard plate 1 and the upper guard plate 2 are evenly provided with mounting holes, and several mounting holes are plugged with sliding rods 10, the bottom ends of the sliding rods 10 are fixed with loading plates 31, and the loading plates 31 are welded with connecting blocks 2 40 near both ends on the side away from the sliding rods 10, the adjacent end of the connecting block 2 40 is plugged with the same movable shaft 3 41, and the circumferential outer wall of the movable shaft 3 41 is rotatably connected with a pair of connecting plates 36 near the middle, the circumferential inner walls of the lower guard plate 1 and the upper guard plate 2 are evenly provided with sliding grooves 2 33 near both sides, and the inner walls of several sliding grooves 2 33 are slidably connected with a pair of pulleys 32, and the adjacent ends of each pair of pulleys 32 are plugged with wheel axles, the circumferential inner walls of the wheel axles are rotatably connected with connecting blocks 1 34 near the middle, and the end of the connecting block 1 34 away from the pulley 32 is plugged with movable shaft 1 35, and the movable shaft 1 35 is connected to the connecting One side of the connecting plate 36 is connected, and a movable shaft 2 38 is inserted on the side of each pair of connecting plates 36 away from the corresponding movable shaft 1 35, and a slider 2 37 is rotatably connected to the circumferential outer wall of the movable shaft 2 38 near the middle, and the end of the same pair of sliders 2 37 away from the connecting plate 36 is slidably connected to a slide rail 39, and the ends of the two slide rails 39 away from the slider 2 37 are fixed to the same fixed plate 8 by bolts, and the ends of the circumferential outer walls of the threaded wire tube 7 and the wire tube 2 17 near the fixed plate 8 are sleeved and fixed with an arc push plate 42; by setting the fixed plate 8, the water pipe can be fixed so that the axis line of the water pipe coincides with the axis line of the lower guard plate 1 and the upper guard plate 2, ensuring that the distances from the transducer 12 and the transducer 2 13 to the axis line of the lower guard plate 1 and the upper guard plate 2 are the same, thereby improving the accuracy of the measurement data and further reducing the influence of the external environment on the measurement data.

[0035] Working principle: First, make the lower guard plate 1 and the upper guard plate 2 surround the water pipe to be tested, then make the protrusion 102 and the groove 201 fit together, and the clamping block 19 is embedded in the corresponding clamping hole 1021 to complete the fixation; then according to the diameter of the water pipe, move the positioning rod 15 along the displacement hole 101 to change the distance between the transducer 2 13 and the transducer 1 12, and then screw the threaded limiting tube 11 into the corresponding limiting hole 14, so that the threaded limiting tube 11 pushes the tray 16 to make the transducer 2 13 close to the outer wall of the water pipe, and at the same time, the arc-shaped push plate 42 squeezes the fixing plate 8, so that a pair of fixing plates 8 installed on the inner wall of the lower guard plate 1 push the axis of the water pipe to coincide with the axis of the lower guard plate 1, and then rotate the threaded wire tube 7 to make the transducer 12 close to the outer wall of the water pipe, and at the same time, make the pair of fixing plates 8 installed on the inner wall of the upper guard plate 2 close to the outer wall of the water pipe to complete the clamping and fixing.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultrasonic water meter, comprising a lower guard plate (1), characterized in that: The upper surface of the lower guard plate (1) is rotatably connected to the upper guard plate (2) via a hinge near one end, and a meter head (5) is fixed to the arc-shaped outer wall of the upper guard plate (2) near the middle of the top by a bolt, a threaded wire tube (7) is screwed on one side of the arc-shaped outer wall of the upper guard plate (2) near the meter head (5), and the bottom end of the threaded wire tube (7) is rotatably connected to transducer 1 (12), the middle of the top of transducer 1 (12) is connected to data line 2 (6), and the end of data line 2 (6) away from transducer 1 (12) passes through the threaded wire tube (7) and is connected to the meter head (5); A wire tube 1 (3) is inserted into the side of the arc-shaped outer wall of the upper guard plate (2) away from the threaded wire tube (7), and a data cable 1 (4) is connected to the side of the meter head (5) away from the data cable 2 (6), the data cable 1 (4) passes through the wire tube 1 (3), and a distance adjustment mechanism is installed at the end of the data cable 1 (4) away from the meter head (5), the distance adjustment mechanism includes a transducer 2 (13), a buckle mechanism is installed at the end of the upper guard plate (2) away from the hinge, the distance adjustment mechanism includes a displacement hole (101), a displacement hole (101) is opened at the bottom of the side of the arc-shaped outer wall of the lower guard plate (1) away from the transducer 1 (12), and the arc-shaped outer wall of the lower guard plate (1) near the displacement hole (101) is provided. Limiting holes (14) are uniformly opened on one side, a threaded limiting tube (11) is screwed on the circumferential inner wall of the limiting hole (14), and the threaded limiting tube (11) passes through the lower guard plate (1), a positioning rod (15) is inserted into the circumferential inner wall of the threaded limiting tube (11), and a tray (16) is screwed on the top of the positioning rod (15), a wire tube 2 (17) is welded to the middle of the top of the tray (16), and a transducer 2 (13) is fixed on the top of the wire tube 2 (17), a wire hole (1701) is opened on the circumferential outer wall of the wire tube 2 (17) near the bottom side, and the end of the data line 1 (4) away from the meter head (5) passes through the wire hole (1701) and is connected to the transducer 2 (13).

2. An ultrasonic water meter according to claim 1, characterized in that: The buckle mechanism comprises a protrusion (102), the protrusions (102) are uniformly welded on the end of the upper surface of the lower guard plate (1) away from the hinge, and a plurality of protrusions (102) are provided with a locking hole (1021) on one side, the grooves (201) are uniformly provided on the end of the lower surface of the upper guard plate (2) close to the protrusion (102), and the grooves (201) and the protrusions (102) are adapted to each other, and a latch mechanism is fixed on the inner wall of the groove (201) on one side close to the locking hole (1021), and the latch mechanism comprises a locking block (19), and the locking block (19) and the locking hole (1021) are adapted to each other.

3. An ultrasonic water meter according to claim 2, characterized in that: The latch mechanism comprises a receiving groove (203), a receiving groove (203) is formed on a side of the groove (201) close to the locking hole (1021), a movable column (26) is inserted into an inner wall of one side of the receiving groove (203), a locking block (19) is fixed on a side of the movable column (26) close to the groove (201), and the receiving groove (203) and the locking block (19) are adapted to each other, and a supporting groove (204) is formed on a side of the upper guard plate (2) close to the movable column (26) and away from the locking block (19). A baffle (30) is fixed to the inner wall of the support groove (204) on the side away from the movable column (26), and a support spring (24) is welded to the side of the baffle (30) close to the movable column (26); a loading plate (29) is fixed to the side of the support spring (24) close to the movable column (26), and the loading plate (29) and the movable column (26) are connected; a movable mechanism is installed on the arc-shaped outer wall of the upper guard plate (2) close to the top of the groove (201), and the movable mechanism includes a second fixing ring (27).

4. An ultrasonic water meter according to claim 3, characterized in that: The movable mechanism comprises a slide groove 1 (202), a slide groove 1 (202) is formed on the arc-shaped outer wall of the upper guard plate (2) near the top of the groove (201), and the slide groove 1 (202) is slidably connected to a slider 1 (22), an open end of the slide groove 1 (202) of the upper guard plate (2) is fixed with a sealing plate (9) by bolts, and a process hole 1 (901) is formed on one end of the slider 1 (22) of the sealing plate (9), a shift rod (18) is inserted into the middle of one side of the slider 1 (22) near the process hole 1 (901), and the shift rod (18) passes through the process hole 1 (901).

5. An ultrasonic water meter according to claim 4, characterized in that: The middle parts of both sides of the slider 1 (22) are screwed with a same movable rod (20), and the circumferential outer wall of the movable rod (20) is evenly sleeved with a fixing ring 1 (21), the circumferential outer wall of the fixing ring 1 (21) is plugged with an insertion rod 1 (23), and the insertion rod 1 (23) passes through the movable rod (20), the bottom end of the fixing ring 1 (21) is welded with a connecting rod (25), and the bottom end of the connecting rod (25) is welded with a fixing ring 2 (27), the circumferential inner walls of several fixing rings 2 (27) are connected to the movable column (26), and the circumferential outer walls of several fixing rings 2 (27) are plugged with insertion rods 2 (28), and the insertion rods 2 (28) pass through the movable column (26).

6. An ultrasonic water meter according to claim 5, characterized in that: The arc-shaped outer walls of the lower guard plate (1) and the upper guard plate (2) are uniformly provided with mounting holes, and a plurality of the mounting holes are plugged with slide bars (10), a loading plate (31) is fixed to the bottom end of each slide bar (10), and a connecting block 2 (40) is welded to the side of the loading plate (31) away from the slide bar (10) near both ends, an adjacent end of the connecting block 2 (40) is plugged with the same movable shaft 3 (41), and a pair of connecting plates (36) are rotatably connected to the circumferential outer wall of the movable shaft 3 (41) near the middle.

7. An ultrasonic water meter according to claim 6, characterized in that: The circumferential inner walls of the lower guard plate (1) and the upper guard plate (2) are uniformly provided with two slide grooves (33) near both sides, and the inner walls of a plurality of the two slide grooves (33) are slidably connected to a pair of pulleys (32), and a wheel axle is inserted at the adjacent end of each pair of pulleys (32), and a connecting block (34) is rotatably connected to the circumferential inner wall of the wheel axle near the middle, and a movable shaft (35) is inserted at the end of the connecting block (34) away from the pulley (32), and the movable shaft (35) is connected to one side of the connecting plate (36), and each pair of connecting plates (36) A movable shaft 2 (38) is inserted into the side away from the corresponding movable shaft 1 (35), and a slider 2 (37) is rotatably connected to the circumferential outer wall of the movable shaft 2 (38) near the middle. The ends of the same pair of sliders 2 (37) away from the connecting plate (36) are slidably connected to a slide rail (39), and the ends of the two slide rails (39) away from the sliders 2 (37) are fixed to the same fixed plate (8) by bolts. The ends of the circumferential outer walls of the threaded wire tube (7) and the wire tube 2 (17) near the fixed plate (8) are both sleeved and fixed with an arc-shaped push plate (42).

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