A liquid flow difference measuring device and method

Abstract

The application discloses a liquid flow difference measuring device, which comprises a pipeline, a mounting mechanism, an ultrasonic measuring instrument, a measuring head, a rubber sleeve, a filtering mechanism, a sealing gasket, a connecting pipe and a connecting mechanism. The upper portion of the pipeline is provided with the mounting mechanism, the upper portion of the mounting mechanism is provided with the ultrasonic measuring instrument, the lower end of the ultrasonic measuring instrument is provided with the measuring head, the pipeline is fixedly sleeved with the rubber sleeve, the pipeline is provided with the filtering mechanism, the inner side of the pipeline is bonded with the sealing gasket, the surface of the sealing gasket is in contact with the connecting pipe, and the outer side of the pipeline is provided with the connecting mechanism. The filter screen, the supporting shaft, the fan blade, the corrugated sleeve, the sealing ring, the sealing groove, the scraper, the connecting shaft and the blocking rod are arranged, the water is filtered through the filter screen, impurities are prevented from entering the pipeline, the filter screen is brushed through the scraper, the fan blade drives the blocking rod and the filter screen to collide, the filter screen is vibrated, impurities are prevented from causing the filter screen to be blocked and affecting the detection result.

Description

Technical Field

[0001] This invention relates to the field of liquid flow difference measurement technology, specifically to a liquid flow difference measurement device and method. Background Technology

[0002] Patent application CN 115046602 A discloses a precision liquid flow difference measurement device and method, comprising: at least one flow sensing unit, an ultrasonic bidirectional receiving and driving unit, a hardware unit, and a calculation unit. The flow sensing unit is connected to both the ultrasonic bidirectional receiving and driving unit and the hardware unit; the ultrasonic bidirectional receiving and driving unit is connected to the hardware unit; and the calculation unit is connected to the hardware unit. This invention employs a dual-channel flow path, with measurement and calculation performed by a single hardware unit and calculation unit, achieving direct measurement of the flow difference with an accuracy of up to 0.1%, effectively increasing the accuracy of the measurement results. Simultaneously, the structure of this invention reduces the size of the device, facilitating portability and use, and effectively lowering the overall cost. In existing technologies, when using liquid flow difference measurement devices, the ultrasonic measuring instrument is typically fixed to the pipe with screws. Screws are prone to corrosion over time, and disassembly and repair are inconvenient after the ultrasonic measuring instrument is damaged. Furthermore, impurities in the liquid can enter the pipe, affecting the accuracy of the measuring head. Therefore, improvements to the existing technology are necessary. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a liquid flow difference measurement device and method, which facilitates the disassembly and maintenance of ultrasonic monitoring instruments and reduces the impact of impurities on measurement data. It solves the problems that when using liquid flow difference measurement devices, ultrasonic measuring instruments are generally fixed to the pipe with screws, which are prone to corrosion after long-term use. Disassembly and maintenance of ultrasonic measuring instruments after damage is inconvenient. At the same time, impurities in the liquid can enter the pipe and affect the detection accuracy of the measuring head.

[0004] To solve the above-mentioned technical problems, the present invention provides a liquid flow difference measuring device, including a pipe, an installation mechanism, an ultrasonic measuring instrument, a measuring head, a rubber sleeve, a filter mechanism, a sealing gasket, a connecting pipe, and a connecting mechanism. The installation mechanism is provided at the upper part of the pipe, the ultrasonic measuring instrument is installed at the upper part of the installation mechanism, the measuring head is provided at the lower end of the ultrasonic measuring instrument, the rubber sleeve is fixedly sleeved inside the pipe, the filter mechanism is provided inside the pipe, the sealing gasket is adhered to the inner side of the pipe, the surface of the sealing gasket contacts the connecting pipe, and the connecting mechanism is provided on the outer side of the pipe.

[0005] The installation mechanism includes a plug, a pin, a spring, a lever, and a slide groove. The plug is fixedly connected to the ultrasonic measuring instrument. The pin is slidably connected inside the plug. The pin is slidably connected to the pipe. A spring is installed inside the pipe. A lever is welded to the pin.

[0006] The filtration mechanism includes a filter screen, a support shaft, fan blades, a corrugated sleeve, a sealing ring, a sealing groove, a scraper, a connecting shaft, and a stop bar. The filter screen is fixedly sleeved inside the pipe. The support shaft is connected to the filter screen through a bearing. The fan blades are welded to the support shaft. The corrugated sleeve is adhered to the filter screen. The corrugated sleeve and the support shaft are rotatably connected. The scraper is welded to the support shaft and contacts the filter screen.

[0007] The connecting mechanism includes a screw cylinder, a slider, an annular groove, a limiting ring, a limiting pin, a retaining ring, an elastic sleeve, and a limiting hole. The screw cylinder is movably connected to the outside of the pipe. The screw cylinder and the sealing gasket are movably connected. The screw cylinder and the connecting pipe are connected by threads. The limiting ring is fixedly sleeved on the outside of the pipe. The limiting pin is slidably connected inside the limiting ring. The retaining ring is fixedly sleeved on the outside of the limiting pin. A limiting hole is opened on the screw cylinder. The limiting pin is slidably connected inside the limiting hole.

[0008] To increase the sealing between the measuring head and the pipe, in a liquid flow difference measuring device of the present invention, preferably, the rubber sleeve and the measuring head are slidably connected, and the rubber sleeve is in contact with the ultrasonic measuring instrument.

[0009] In order to facilitate the reset of the pin, as a liquid flow difference measuring device of the present invention, preferably, one end of the spring is fixedly connected to the pipe and the other end of the spring is fixedly connected to the pin.

[0010] In order to allow the lever to pass through the pipe, as a liquid flow difference measuring device of the present invention, preferably, a groove is provided on the pipe, and the lever is slidably connected in the groove.

[0011] To prevent impurities from passing through the gap between the support shaft and the filter screen, in a preferred embodiment of the liquid flow difference measuring device of the present invention, a sealing ring is fixedly fitted inside the corrugated sleeve, and a sealing groove is provided on the support shaft, with the sealing ring slidably connected inside the sealing groove.

[0012] In order to make the filter screen vibrate, as a liquid flow difference measuring device of the present invention, preferably, a connecting shaft is welded inside the pipe, and a stop bar is installed on the outside of the connecting shaft through a bearing, and the stop bar is in contact with the fan blade.

[0013] In order to connect the screw barrel and the pipe, as a liquid flow difference measuring device of the present invention, preferably, a slider is welded on the screw barrel, and an annular groove is formed on the pipe, with the slider slidably connected in the annular groove.

[0014] In order to facilitate the reset of the limiting pin, as a liquid flow difference measuring device of the present invention, preferably, an elastic sleeve is bonded to the retaining ring, and the elastic sleeve is bonded to the limiting ring.

[0015] A method for using a liquid flow differential measuring device, comprising the following specific steps:

[0016] Step 1: Manually move the screw barrel so that it slides on the outside of the pipe, and then move the pipe between the two connecting pipes;

[0017] Step two, then move the screw barrel to slide on the outside of the pipe, manually move the limit pin, the limit pin moves and disengages from the limit hole, the limit pin drives the retaining ring to move, the retaining ring moves and compresses the elastic sleeve, then rotate the screw barrel and connecting pipe to make threaded movement, thereby fixing the connecting pipe and the pipe, then release the limit pin, the elastic sleeve resets and the limit pin enters the limit hole, thereby limiting the screw barrel and preventing the connection between the screw barrel and the connecting pipe from loosening;

[0018] Step 3: Then, start the regulating valve on the connecting pipe to release water. The water flows through the filter screen and is filtered by the filter screen. The water flow impacts the fan blades, causing the fan blades to drive the support shaft to rotate. The support shaft drives the scraper to move. The scraper moves and brushes the filter screen to prevent the filter screen from clogging.

[0019] Step four: The fan blades rotate and collide with the baffle, causing the baffle to rotate and collide with the filter screen, causing the filter screen to vibrate. While the filter screen is being scraped, it can also vibrate to remove impurities. The water flow impacts the measuring head, which monitors the liquid flow rate based on the water flow speed and pipe diameter. The flow difference is measured based on the monitoring results at different etching times.

[0020] Step 5: When the ultrasonic measuring instrument is damaged, manually move the lever. The lever moves the pin, causing it to disengage from the insert block. This compresses the spring, allowing the ultrasonic measuring instrument to separate from the rubber sleeve. Simultaneously, the measuring head slides out of the rubber sleeve, completing the disassembly of the ultrasonic measuring instrument and facilitating its repair.

[0021] Compared with related technologies, the present invention has the following beneficial effects:

[0022] By setting up structures such as plugs, pins, springs, levers, and slides, and by moving the pins with the levers, the pins and plugs can be easily engaged and disengaged, which in turn makes it easy to assemble and disassemble the ultrasonic measuring instrument and the pipeline, and makes it easy to disassemble and maintain the ultrasonic measuring instrument.

[0023] By incorporating a filter screen, support shaft, fan blades, corrugated sleeve, sealing ring, sealing groove, scraper, connecting shaft, and baffle, the filter screen filters the water flow, preventing impurities from entering the pipe. The scraper brushes against the filter screen, and the fan blades drive the baffle to collide with the filter screen, causing it to vibrate and preventing impurities from clogging the filter screen and affecting the test results.

[0024] By setting up structures such as a screw cylinder, slider, annular groove, limiting ring, limiting pin, retaining ring, elastic sleeve, and limiting hole, the device and the connecting pipe are easily connected by moving the screw cylinder and making threaded movements through the screw cylinder and the connecting pipe. Furthermore, the screw cylinder is limited by the cooperation of the limiting pin and the limiting hole, which makes the connection between the pipe and the connecting pipe stable.

[0025] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a perspective view of the overall structure of the present invention;

[0028] Figure 2 For the present invention Figure 1 Front sectional view

[0029] Figure 3 For the present invention Figure 2 Enlarged view of point A in the image;

[0030] Figure 4 For the present invention Figure 2 Enlarged view of point B in the image;

[0031] Figure 5 For the present invention Figure 2 Enlarged view of point C in the image;

[0032] Figure 6 For the present invention Figure 2 Enlarged view of point D in the image.

[0033] The following are the labeling elements in the diagram: 1. Pipeline; 2. Installation mechanism; 3. Ultrasonic measuring instrument; 4. Measuring head; 5. Rubber sleeve; 6. Filtering mechanism; 7. Sealing gasket; 8. Connecting pipe; 9. Connecting mechanism; 21. Insert block; 22. Pin; 23. Spring; 24. Lever; 25. Slide groove; 61. Filter screen; 62. Support shaft; 63. Fan blade; 64. Corrugated sleeve; 65. Sealing ring; 66. Sealing groove; 67. Scraper; 68. Connecting shaft; 69. Stop bar; 91. Screw; 92. Slider; 93. Ring groove; 94. Limiting ring; 95. Limiting pin; 96. Retaining ring; 97. Elastic sleeve; 98. Limiting hole. Detailed Implementation

[0034] Please see Figures 1-6 A liquid flow difference measuring device includes a pipe 1, an installation mechanism 2, an ultrasonic measuring instrument 3, a measuring head 4, a rubber sleeve 5, a filter mechanism 6, a sealing gasket 7, a connecting pipe 8, and a connecting mechanism 9. The installation mechanism 2 is provided at the upper part of the pipe 1, the ultrasonic measuring instrument 3 is installed at the upper part of the installation mechanism 2, the measuring head 4 is provided at the lower end of the ultrasonic measuring instrument 3, the rubber sleeve 5 is fixedly sleeved inside the pipe 1, the filter mechanism 6 is provided inside the pipe 1, the sealing gasket 7 is bonded to the inner side of the pipe 1, the surface of the sealing gasket 7 contacts the connecting pipe 8, and the connecting mechanism 9 is provided on the outer side of the pipe 1.

[0035] The mounting mechanism 2 includes a plug 21, a pin 22, a spring 23, a lever 24, and a slide 25. The plug 21 is fixedly connected to the ultrasonic measuring instrument 3. The pin 22 is slidably connected inside the plug 21. The pin 22 is slidably connected to the pipe 1. The spring 23 is installed inside the pipe 1. The lever 24 is welded to the pin 22.

[0036] The filtration mechanism 6 includes a filter screen 61, a support shaft 62, a fan blade 63, a corrugated sleeve 64, a sealing ring 65, a sealing groove 66, a scraper 67, a connecting shaft 68, and a stop bar 69. The filter screen 61 is fixedly sleeved inside the pipe 1. The support shaft 62 is connected to the filter screen 61 through a bearing. The fan blade 63 is welded to the support shaft 62. The corrugated sleeve 64 is bonded to the filter screen 61. The corrugated sleeve 64 and the support shaft 62 are rotatably connected. The scraper 67 is welded to the support shaft 62 and contacts the filter screen 61.

[0037] The connecting mechanism 9 includes a screw cylinder 91, a slider 92, an annular groove 93, a limiting ring 94, a limiting pin 95, a retaining ring 96, an elastic sleeve 97, and a limiting hole 98. The screw cylinder 91 is movably connected to the outside of the pipe 1. The screw cylinder 91 and the sealing gasket 7 are movably connected. The screw cylinder 91 and the connecting pipe 8 are connected by threads. The limiting ring 94 is fixedly sleeved on the outside of the pipe 1. The limiting pin 95 is slidably connected inside the limiting ring 94. The retaining ring 96 is fixedly sleeved on the outside of the limiting pin 95. The screw cylinder 91 has a limiting hole 98. The limiting pin 95 is slidably connected inside the limiting hole 98.

[0038] In this embodiment: the screw cylinder 91 is manually moved to slide outside the pipe 1. Then, the pipe 1 is moved between the two connecting pipes 8, and the screw cylinder 91 is moved to slide outside the pipe 1. The limiting pin 95 is manually disengaged from the limiting hole 98. Then, the screw cylinder 91 and the connecting pipe 8 are rotated to make threaded movements, thereby fixing the connecting pipe 8 and the pipe 1. Then, the limiting pin 95 is released, and the elastic sleeve 97 is reset, allowing the limiting pin 95 to enter the limiting hole 98, thereby limiting the screw cylinder 91 and preventing the connection between the screw cylinder 91 and the connecting pipe 8 from loosening. Water flows through the filter screen 61 and is filtered by the filter screen 61. The water flow impacts the fan blade 63, causing the fan blade 63 to drive the support shaft 62 to rotate. The support shaft 62 drives the scraper 67 to move, and the scraper 67 brushes the filter screen 61 to prevent it from clogging. At the same time, the fan blade 63 rotates and collides with the baffle 69, causing the baffle 69 to rotate and collide with the filter screen 61, making the filter screen 61 vibrate. This scraping and vibration removes impurities from the filter screen 61. By manually moving the lever 24, the lever 24 drives the pin 22 to move, and the pin 22 moves and disengages from the plug block 21, compressing the spring 23. This then moves the ultrasonic measuring instrument 3 away from the rubber sleeve 5, allowing the measuring head 4 to slide out of the rubber sleeve 5, thus completing the disassembly of the ultrasonic measuring instrument 3 and facilitating its maintenance.

[0039] As an optimized solution for liquid flow difference measurement device according to the present invention, the rubber sleeve 5 and the measuring head 4 are slidably connected, and the rubber sleeve 5 is in contact with the ultrasonic measuring instrument 3.

[0040] In this embodiment: by setting a rubber sleeve 5, the sealing between the measuring head 4 and the pipe 1 is increased.

[0041] As an optimized solution for liquid flow difference measurement device according to the present invention, one end of spring 23 is fixedly connected to pipe 1, and the other end of spring 23 is fixedly connected to pin 22.

[0042] In this embodiment, a spring 23 is provided to facilitate the reset of the pin 22.

[0043] As an optimized solution for liquid flow difference measurement device according to the present invention, a sliding groove 25 is provided on the pipe 1, and a lever 24 is slidably connected in the sliding groove 25.

[0044] In this embodiment: by setting a slide groove 25, the lever 24 passes through the pipe 1.

[0045] As an optimized solution for liquid flow difference measurement device of the present invention, a sealing ring 65 is fixedly sleeved inside the corrugated sleeve 64, and a sealing groove 66 is opened on the support shaft 62, and the sealing ring 65 is slidably connected inside the sealing groove 66.

[0046] In this embodiment, by setting a sealing ring 65 and a sealing groove 66, impurities are prevented from passing through the gap between the support shaft 62 and the filter screen 61.

[0047] As an optimized solution for liquid flow difference measurement device according to the present invention, a connecting shaft 68 is welded inside the pipe 1, and a stop rod 69 is installed on the outside of the connecting shaft 68 through a bearing, and the stop rod 69 is in contact with the fan blade 63.

[0048] In this embodiment, the filter screen 61 can vibrate by setting a baffle 69.

[0049] As an optimized solution for liquid flow difference measurement device of the present invention, a slider 92 is welded on the screw barrel 91, and an annular groove 93 is opened on the pipe 1, with the slider 92 slidably connected in the annular groove 93.

[0050] In this embodiment, the screw barrel 91 and the pipe 1 are connected by setting the slider 92 and the annular groove 93.

[0051] As an optimized solution for liquid flow difference measurement device according to the present invention, an elastic sleeve 97 is bonded to the retaining ring 96, and the elastic sleeve 97 and the limiting ring 94 are bonded together.

[0052] In this embodiment: by setting the elastic sleeve 97, the limiting pin 95 can be easily reset.

[0053] A method for using a liquid flow differential measuring device, comprising the following specific steps:

[0054] Step 1: Manually move the screw barrel 91 so that it slides on the outside of the pipe 1, and then move the pipe 1 between the two connecting pipes 8;

[0055] Step two, then move the screw cylinder 91 to slide outside the pipe 1, manually move the limiting pin 95, the limiting pin 95 moves and disengages from the limiting hole 98, the limiting pin 95 drives the retaining ring 96 to move, the retaining ring 96 moves and compresses the elastic sleeve 97, then rotate the screw cylinder 91 and the connecting pipe 8 to make threaded movement, thereby fixing the connecting pipe 8 and the pipe 1, then release the limiting pin 95, the elastic sleeve 97 resets and the limiting pin 95 enters the limiting hole 98, thereby limiting the screw cylinder 91 and preventing the connection between the screw cylinder 91 and the connecting pipe 8 from loosening;

[0056] Step 3: Then start the regulating valve on the connecting pipe 8 to release water. The water flows through the filter screen 61 and is filtered by the filter screen 61. The water flow impacts the fan blade 63, causing the fan blade 63 to drive the support shaft 62 to rotate. The support shaft 62 drives the scraper 67 to move. The scraper 67 moves to brush the filter screen 61 to prevent the filter screen 61 from clogging.

[0057] Step 4: The fan blade 63 rotates and collides with the baffle 69, causing the baffle 69 to rotate and collide with the filter screen 61, causing the filter screen 61 to vibrate. While the filter screen 61 is being scraped, it can vibrate to remove impurities. The water flow impacts the measuring head 4. The measuring head 4 monitors the liquid flow rate based on the water flow speed and the diameter of the pipe 1. It measures the flow difference based on the monitoring results at different etching times.

[0058] Step 5: When the ultrasonic measuring instrument 3 is damaged, manually move the lever 24. The lever 24 drives the pin 22 to move, and the pin 22 moves and disengages from the plug block 21, so that the spring 23 is compressed. Then, the ultrasonic measuring instrument 3 is moved away from the rubber sleeve 5, and the measuring head 4 slides out from the rubber sleeve 5, thereby completing the disassembly of the ultrasonic measuring instrument 3, which facilitates the repair of the ultrasonic measuring instrument 3.

[0059] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A liquid flow difference measuring device, comprising a pipe (1), an installation mechanism (2), an ultrasonic measuring instrument (3), a measuring head (4), a rubber sleeve (5), a filter mechanism (6), a sealing gasket (7), a connecting pipe (8), and a connecting mechanism (9), characterized in that, An installation mechanism (2) is provided at the upper part of the pipe (1), an ultrasonic measuring instrument (3) is installed at the upper part of the installation mechanism (2), a measuring head (4) is provided at the lower end of the ultrasonic measuring instrument (3), a rubber sleeve (5) is fixedly fitted inside the pipe (1), a filter mechanism (6) is provided inside the pipe (1), a sealing gasket (7) is bonded to the inner side of the pipe (1), a connecting pipe (8) is in contact with the surface of the sealing gasket (7), and a connecting mechanism (9) is provided on the outer side of the pipe (1). The installation mechanism (2) includes a plug (21), a pin (22), a spring (23), a lever (24), and a slide (25). The plug (21) is fixedly connected to the ultrasonic measuring instrument (3). The pin (22) is slidably connected inside the plug (21). The pin (22) is slidably connected to the pipe (1). The spring (23) is installed inside the pipe (1). The lever (24) is welded to the pin (22). The filtration mechanism (6) includes a filter screen (61), a support shaft (62), a fan blade (63), a corrugated sleeve (64), a sealing ring (65), a sealing groove (66), a scraper (67), a connecting shaft (68), and a stop bar (69). The filter screen (61) is fixedly sleeved inside the pipe (1). The support shaft (62) is connected to the filter screen (61) through a bearing. The fan blade (63) is welded onto the support shaft (62). The corrugated sleeve (64) is bonded to the filter screen (61). The corrugated sleeve (64) and the support shaft (62) are rotatably connected. The scraper (67) is welded onto the support shaft (62). The scraper (67) is in contact with the filter screen (61). The connecting mechanism (9) includes a screw cylinder (91), a slider (92), an annular groove (93), a limiting ring (94), a limiting pin (95), a retaining ring (96), an elastic sleeve (97), and a limiting hole (98). The screw cylinder (91) is movably connected to the outside of the pipe (1). The screw cylinder (91) and the sealing gasket (7) are movably connected. The screw cylinder (91) and the connecting pipe (8) are connected by threads. The limiting ring (94) is fixedly sleeved on the outside of the pipe (1). The limiting pin (95) is slidably connected inside the limiting ring (94). The retaining ring (96) is fixedly sleeved on the outside of the limiting pin (95). The limiting hole (98) is opened on the screw cylinder (91). The limiting pin (95) is slidably connected inside the limiting hole (98).

2. In the liquid flow difference measuring device according to claim 1, the rubber sleeve (5) and the measuring head (4) are slidably connected, and the rubber sleeve (5) is in contact with the ultrasonic measuring instrument (3).

3. According to claim 1, one end of the spring (23) is fixedly connected to the pipe (1), and the other end of the spring (23) is fixedly connected to the pin (22).

4. A liquid flow difference measuring device according to claim 1, wherein a groove (25) is provided on the pipe (1), and a lever (24) is slidably connected in the groove (25).

5. A liquid flow difference measuring device according to claim 1, wherein a sealing ring (65) is fixedly sleeved inside the corrugated sleeve (64), and a sealing groove (66) is provided on the support shaft (62), wherein the sealing ring (65) is slidably connected inside the sealing groove (66).

6. A liquid flow difference measuring device according to claim 1, wherein a connecting shaft (68) is welded inside the pipe (1), and a stop rod (69) is installed on the outside of the connecting shaft (68) through a bearing, and the stop rod (69) is in contact with the fan blade (63).

7. A liquid flow difference measuring device according to claim 1, wherein a slider (92) is welded on the screw (91), and an annular groove (93) is provided on the pipe (1), and the slider (92) is slidably connected in the annular groove (93).

8. A liquid flow difference measuring device according to claim 1, wherein an elastic sleeve (97) is bonded to the retaining ring (96), and the elastic sleeve (97) and the limiting ring (94) are bonded together.

9. A method of using a liquid flow difference measuring device according to any one of claims 1 to 8, characterized in that, The specific steps include: Step 1: Manually move the screw (91) so that the screw (91) slides outside the pipe (1), and then move the pipe (1) between the two connecting pipes (8); Step 2: Then move the screw cylinder (91) to slide outside the pipe (1), manually move the limit pin (95), the limit pin (95) moves and disengages from the limit hole (98), the limit pin (95) drives the retaining ring (96) to move, the retaining ring (96) moves and compresses the elastic sleeve (97), then rotate the screw cylinder (91) and the connecting pipe (8) to make threaded movement, thereby fixing the connecting pipe (8) and the pipe (1), then release the limit pin (95), the elastic sleeve (97) resets and the limit pin (95) enters the limit hole (98), thereby limiting the screw cylinder (91) and preventing the connection between the screw cylinder (91) and the connecting pipe (8) from loosening; Step 3: Then start the regulating valve on the connecting pipe (8) to release water. The water flows through the filter screen (61) and is filtered by the filter screen (61). The water flow impacts the fan blades (63), causing the fan blades (63) to drive the support shaft (62) to rotate. The support shaft (62) drives the scraper (67) to move. The scraper (67) moves to brush the filter screen (61) to prevent the filter screen (61) from clogging. Step 4: The fan blade (63) rotates and collides with the baffle (69), causing the baffle (69) to rotate and collide with the filter screen (61), causing the filter screen (61) to vibrate. While the filter screen (61) is being scraped, it can vibrate to remove impurities. The water flow impacts the measuring head (4), and the measuring head (4) monitors the liquid flow rate according to the water flow speed and the pipe (1) diameter. The flow difference is measured according to the monitoring results at different etching times. Step 5: When the ultrasonic measuring instrument (3) is damaged, manually move the lever (24). The lever (24) drives the pin (22) to move. The pin (22) moves and disengages from the plug (21), so that the spring (23) is compressed. Then, the ultrasonic measuring instrument (3) is moved away from the rubber sleeve (5), and the measuring head (4) slides out from the rubber sleeve (5), thereby completing the disassembly of the ultrasonic measuring instrument (3) and facilitating the repair of the ultrasonic measuring instrument (3).

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